Relevant bibliographies by topics / Harvester

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Harvester'

Author: Grafiati
Published: 4 June 2021
Last updated: 22 February 2023

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Journal articles on the topic "Harvester"

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Wanjura, John D., Kevin Baker, and Edward Barnes. "COTTON GINNERS HANDBOOK (2016 Revised Edition): Harvesting." Journal of Cotton Science 21, no. 1 (2017): 70–80. http://dx.doi.org/10.56454/axfa4722.

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The spindle picker and brush-roll stripper are the two machines used to harvest cotton produced in the U.S. Adoption of each harvester type is dictated by regional differences in production environment, production practices, cultivar, and yield. The spindle picker is a selective-type harvester that harvests seed cotton only from well-opened bolls, collecting a minimal amount of undesirable foreign material with the seed cotton. The brush-roll stripper utilizes a nonselective harvesting mechanism to indiscriminately remove mature seed cotton, immature bolls, sticks, leaves, and any other vegetative material that is easily broken off the plant. Thus, fiber quality can be reduced for stripper-harvested cotton because of the increased presence of immature fibers relative to picker-harvested cotton. Spindle pickers are more mechanically complex than brush-roll strippers and require additional daily maintenance to ensure optimum performance. Considering conventional harvesters equipped with baskets, stripper-type harvesters cost less to own and operate than spindle pickers resulting in lower harvesting costs. Regardless of harvester type, careful attention to setup and maintenance is required to achieve maximum harvesting efficiency, field productivity, and fiber quality.
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Yarborough, David E. "A Reevaluation of Mechanical Harvester vs. Hand-raking for Wild Blueberries." HortScience 30, no. 4 (July 1995): 800F—800. http://dx.doi.org/10.21273/hortsci.30.4.800f.

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Improvements in the Bragg harvester and the introduction of a new Nimco harvester warranted a reevaluation of new technologies. Four technologies: the Bragg harvester, a modified Bragg harvester, the Nimco prototype, and hand-harvesting were evaluated at two locations: a land-leveled field (T-19) and a field without land leveling (Deblois). The experimental design was a randomized complete block with eight replications. A 150-ft strip was harvested with each technology, with strips directly adjacent to each other to minimize field variability. Time to harvest and berry weights were measured. Poor maintenance, adjustment and skill of the operator contributed to a 69% recovery relative to hand-harvest by both the Bragg and modified Bragg harvesters. The Nimco harvester has great potential, but only if it is properly mounted to allow it to cover the fields at a speed similar to the Bragg harvesters. The land-leveled field allowed for greater recovery for the Bragg and Nimco harvester, indicating that smoother fields are more efficient for machine-harvesting.
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Novák, Pavel, and Patrik Burg. "Evaluation of harvest losses within a full mechanised grape harvest." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 61, no. 3 (2013): 751–56. http://dx.doi.org/10.11118/actaun201361030751.

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A contribution deals with an evaluation of harvest losses within a full mechanised berries harvest using two self-propelled harvesters GREGOIRE G 152 and NEW HOLLAND VL 6060 differing in kinds of harvesting and catching mechanisms. Observation was done in vineyards of ZVOS Hustopeče joint–stock company at harvest of Müller Thurgau and Lemberger varieties in a period 2009–2010. Results gained under operating conditions showed that both self-propelled harvesters reached a comparable quality of a harvested product. There were observed losses by a slump in a case of using GREGOIRE G 152 harvester 0.8–1.45%. By using NEW HOLLAND VL 6060 the losses were 0.86–1.52% and data were gained with a respect to vine condition, the variety and the vintage. Next to losses by the slump also losses as non-harvested product were observed. Using GREGOIRE G 152 were reached 1.08–2.56% of non-harvested product losses and in a case of NEW HOLLAND VL 6060 similarly 1.17–2.22%. However a value of the non-harvested product losses cannot be perceived absolutely because in a practice the non-harvested grapes are consequently picked up manually. Total losses perceived as a sum of losses by the slump and non-harvested losses values were at GREGOIRE G 152 harvester 2–4% and at NEW HOLLAND VL 6060 harvester 2–3.7% of total hectare yield.
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Rajarathinam, Murugesan, and Shaikh Faruque Ali. "Investigation of a hybrid piezo-electromagnetic energy harvester." tm - Technisches Messen 85, no. 9 (September 25, 2018): 541–52. http://dx.doi.org/10.1515/teme-2017-0086.

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Abstract A hybrid energy harvester combining piezoelectric and electromagnetic transduction mechanisms is designed to scavenge vibration energy. The system comprises of a cantilever beam, a piezoelectric harvester and a magnetic mass hung through a spring at the free end. The beam with piezoelectric harvests electrical energy due to the strain induced in the piezoelectric patch. The hung mass oscillates in and out a solenoid to harvest energy due to electromagnetic induction. The system can generate power from any vertically oscillating vibrating host structure. This paper studies the power harvested from the hybrid harvester under harmonic excitation using experimental and analytical evaluations. Comparisons are made with the standalone piezoelectric and electromagnetic harvester under the same excitation environment. The study shows that the present hybrid harvester can harvest energy at a broad range of frequencies. Furthermore few parametric studies are carried out for understanding the device performance. Finally, the efficiency of the proposed hybrid energy harvester is compared with the existing hybrid energy harvester.
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Jiang, Bing, Fan Zhu, Yi Yang, Jingyu Zhu, Yuting Yang, and Ming Yuan. "A Hybrid Piezoelectric and Electromagnetic Broadband Harvester with Double Cantilever Beams." Micromachines 14, no. 2 (January 18, 2023): 240. http://dx.doi.org/10.3390/mi14020240.

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Vibration-energy harvesting is an effective strategy for replacing batteries and provides a long-term power supply to microelectronic devices. Harvesting vibration energy from human motions has attracted research attention in recent years. Here, a novel low-frequency hybrid piezoelectric and electromagnetic broadband harvester is proposed. Two parallel piezoelectric cantilever beams support the harvester and capture environmental vibration energy based on the piezoelectric effect. A permanent magnet is connected by springs to the two beams, and a fixed coil surrounds the moving permanent magnet, enabling energy conversion via the electromagnetic effect and the proof mass. The parameters influencing the output power of the harvester are optimized numerically to boost the harvester’s performance. The output power of the proposed hybrid harvester is compared with that of a piezoelectric harvester and an electromagnetic harvester. The simulation results show that the output power is significantly higher for the hybrid harvester than for the piezoelectric and electromagnetic harvesters, and the bandwidth is broader owing to the double cantilevers. An experiment is conducted using a prototype of the hybrid harvester to evaluate its output power. The results show multiple resonant peaks, an extended bandwidth, and a maximum power of 6.28 mW. In contrast, the maximum harvested power of the piezoelectric harvester is only 5.15 mW at 9.6 Hz.
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Asmar, Omar, Ranjeet Jeevan, and Azhar Iqbal. "Minimal Access Tendon Harvesting without a Harvester: A Cheap and Effective Alternative Technique Using a Plastic Yankauer Suction Tip." Journal of Hand Surgery (Asian-Pacific Volume) 25, no. 04 (October 28, 2020): 515–17. http://dx.doi.org/10.1142/s2424835520710010.

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Tendon grafting is a key component of hand reconstructive procedures. Commercially produced tendon harvesters facilitate this grafting process but are not always available. We present an innovative technique that allows tendon harvest to be undertaken using equipment readily available in all hospitals. Only a scalpel blade and a plastic Yankauer suction tip are required. Two simple and rapid modifications are made to the suction tip using the blade prior to its use. The described tool has been conceived, refined and used successfully by the authors, without complications, and allows tendon harvest via the standard minimally invasive approach associated with a conventional harvester. Creating this improvised harvester is neither challenging nor time-consuming, and this cheap and effective substitute allows tendon grafts to be harvested using a minimal access approach in environments where a traditional harvester is not available, or not sterile.
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Pajic, Milos, Vesna Pajic, Sanjin Ivanovic, Mico Oljaca, Kosta Gligorevic, Dusan Radojicic, Milan Drazic, and Ivan Zlatanovic. "Influence of harvester type and harvesting time on quality of harvested chamomile." Journal of Agricultural Sciences, Belgrade 61, no. 2 (2016): 201–13. http://dx.doi.org/10.2298/jas1602201p.

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This paper is the result of studying effects of mechanical chamomile harvesting on yield and quality of harvested chamomile. Chamomile (Chamomilla recutita (L) Rausch.) was harvested at three time intervals (T1 - 240 days, T2 - 250 days and T3 - 260 days after sowing) by three conceptually different harvesters. The results achieved indicate that the harvester type significantly influences quality of harvested chamomile, whereas it is not influenced by chamomile harvesting time. Quality of harvested chamomile was classified into four categories, and it was observed that the greater number of rotations of a picking device increased the content of the first category of quality. The harvester A achieved 54.79% of the first category of quality in respect to the harvester B achieving 50.26% and the harvester C with 42.93%.
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Takeda, Fumiomi, Gerard Krewer, Elvin L. Andrews, Benjamin Mullinix, and Donald L. Peterson. "Assessment of the V45 Blueberry Harvester on Rabbiteye Blueberry and Southern Highbush Blueberry Pruned to V-Shaped Canopy." HortTechnology 18, no. 1 (January 2008): 130–38. http://dx.doi.org/10.21273/horttech.18.1.130.

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Mechanical harvesting systems for processed blueberries (Vaccinium spp.) are available. However, low harvest efficiency and high fruit damage have limited the use of mechanical harvesters for picking blueberries for fresh market to specific cultivars under good weather conditions. New harvesting technology for fresh-market blueberries is needed. The V45 harvester was developed by the U.S. Department of Agriculture in 1994 to harvest fresh-market-quality northern highbush (V. corymbosum) blueberries in Michigan. The current study was performed in Georgia to evaluate the V45 harvester on specially pruned rabbiteye blueberry [V. virgatum (syn. V. ashei)] and southern highbush blueberry (V. darrowi × V. corymbosum) and included analysis of harvest efficiency and fruit quality (percent blue fruit, percent bloom, percent split skin, and internal bruise damage). Six-year-old, 6- to 8-ft-tall ‘Brightwell’ and ‘Powderblue’ rabbiteye blueberry plants were winter pruned to remove vertically growing and overarching canes in the center of the bush in Jan. 2004 and Feb. 2005 respectively. Three-year-old, 3- to 5-ft-tall ‘FL 86-19’ and ‘Star’ southern highbush blueberry plants were similarly pruned in summer (June 2004) or in winter (Feb. 2005). Pruning removed an estimated 30% to 50% of the canopy and opened the middle, resulting in V-shaped plants in both rabbiteye and southern highbush blueberries. Yield of winter-pruned ‘Brightwell’ rabbiteye blueberry was lower compared with unpruned plants during both years, but winter-pruned ‘Powderblue’ rabbiteye blueberry plants produced as much as unpruned plants in 2005. In ‘FL 86-19’ southern highbush blueberry, plants that were summer pruned in June 2004 produced as much as unpruned plants in 2005, but plants that were winter pruned in Feb. 2005 had lower yields than unpruned plants in 2005. The V45 harvester caused little cane damage on pruned blueberry plants. In rabbiteye blueberries, internal fruit damage and skin splitting was less in V45-harvested fruit than in fruit harvested by a sway harvester and nearly that of hand-harvested fruit. However, in ‘FL 86-19’ southern highbush blueberry, the V45 harvester detached a lower percentage of blue fruit and excessive amounts of immature and stemmed fruit. These findings suggest that the V45 harvester has the potential to harvest some rabbiteye blueberry cultivars mechanically with fruit quality approaching that of hand-harvested fruit.
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Carneiro, Pedro M. R., Jorge A. F. Ferreira, Andrei L. Kholkin, and Marco P. Soares dos Santos. "Towards Self-Adaptability of Instrumented Electromagnetic Energy Harvesters." Machines 10, no. 6 (May 25, 2022): 414. http://dx.doi.org/10.3390/machines10060414.

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Motion-driven electromagnetic energy harvesting is a well-suited technological solution to autonomously power a broad range of autonomous devices. Although different harvester configurations and mechanisms have been already proposed to perform effective tuning and broadband harvesting, no methodology has proven to be effective to maximize the harvester performance for unknown and time-varying patterns of mechanical power sources externally exciting the harvesters. This paper provides, for the first time, a radically new concept of energy harvester to maximize the harvested energy for time-varying excitations: the self-adaptive electromagnetic energy harvester. This research work aims to analyze the electric energy harvesting gain when self-adaptive electromagnetic harvesters, using magnetic levitation architectures, are able to autonomously adapt their architecture as variations in the excitation patterns occur. This was accomplished by identifying the optimal harvester length for different excitation patterns and load resistances. Gains related to electric current and power exceeding 100 can be achieved for small-scale harvesters. The paper also describes comprehensive case studies to verify the feasibility of the self-adaptive harvester, considering the energy demand from the adaptive mechanism, namely the sensing, processing and actuation systems. These successful results highlight the potential of this innovative methodology to design highly sophisticated energy harvesters, both for a small- and large-scale power supply.
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Yarborouph, David E. "A COMPARISON OF THREE MECHANICAL HARVESTERS AND HANDRAKING FOR WILD BLUEBERRIES." HortScience 27, no. 6 (June 1992): 600d—600. http://dx.doi.org/10.21273/hortsci.27.6.600d.

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Hand raking was compared to a non-mechanized machine and to two self propelled harvesters for yield and harvest time. Experimental design was split-plot replicated six times with four harvesters/plot with each raker using each machine in each plot. The machines were operated adjacent to one another. Hand raking resulted in the highest yield recovery of all harvesters. Average yield varied by raker from a high of 4831 kg/ha to a low of 3884 kg/ha. The Bluevester harvester recovered 91% of hand harvest and was 1.6 times faster than hand raking while the Darlington machine harvested one half of hand harvest in one quarter of the time. The Easy Pick recovered 81% of hand harvest but was twice as fast. Mechanical harvesters took less time but recovered fewer berries. A economic analysis is needed to fully evaluate these machines.
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Dissertations / Theses on the topic "Harvester"

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Lewis, Andrew Geoffrey. "Automated Asparagus Harvester Feasibility Study." Thesis, University of Canterbury. Engineering Management, 2013. http://hdl.handle.net/10092/7442.

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The Tendertips Company (TTC) is an asparagus growing a packing business which has a problem. Not enough New Zealanders are willing to manually harvest asparagus. Samoan workers are being employed through the recognised seasonal employer (RSE) scheme which incurs a large cost to TTC. This scheme is also susceptible to a change in government policy at any time. Automated asparagus harvesters have been designed in the past however they inflict too much damage to asparagus plants and the paddocks in which they grow. Several research projects have also been undertaken to minimise this damage while robotically harvesting asparagus however no solutions currently exist. In this project a low-cost system was designed and constructed to determine the feasibility of selectively harvesting asparagus without inflicting damage to asparagus plants or the paddock. The most technical component in this system was identified, accurately identifying and locating asparagus spears to be harvested. A camera and lighting system, along with an asparagus data logging system was designed and tested, with the assumption that if this system succeeded, the development of an automated asparagus harvester would have a very high chance of success. The system proved that individual asparagus spears can be located accurately enough so as not to inflict damage on other spears during the harvesting process: • 96.8% of asparagus spears were located. • Average location error of 3.0mm. The measurement of the size and height of asparagus spears was not very accurate due to the lighting system, however this is expected to be fixed with a design change. A global positioning system (GPS) successfully saved the calculated size of the asparagus spear with its global location to allow for analysis of the asparagus paddocks using the Google Earth application. The cost of robotically harvesting asparagus is forecast to be much less than manual harvesting: • Manual harvesting cost $1.40 per kilogram • Forecast robotic harvesting cost $0.41 per kilogram. If one other investor was obtained to create a new business, which developed an automated asparagus harvester before harvesting asparagus in New Zealand and California, the forecast financials are: • Net present value (NPV) of $1.613 million after ten years. • Internal rate of return (IRR) of 33% after ten years. • Maximum accumulated investment from TTC of $449,000 four years after development first begins. The forecast income is through harvesting asparagus only as selling the machines or leasing the intellectual property is not viable. A guiding document was created to guide TTC with the development of an automated asparagus harvester if it aligns with their business model. The development of an automated harvester: • Is technically viable. • Will lower harvesting costs. • Will ensure all of TTC’s asparagus is harvested when required. • Will return sustainable profits to the child business that TTC should create. The project management techniques adopted in this project ensured the project was completed on the planned day of completion, while remaining on budget: • Budgeted cost of work scheduled $24,478.21 • Budgeted cost of work performed $24,027.54
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Angulo, Ignacio. "Harvester Energy Modelling and Optimization." Thesis, KTH, Maskinkonstruktion (Inst.), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-192131.

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Denna rapport är resultatet av ett examensarbete på Kungliga Tekniska Högskolan i samarbete med Skogforsk. Syftet är att analysera den trädkapningsprocessen hos en skördare, optimera dess energiförbrukning och föreslå modifieringar av systemet. En analys av skördarhuvudets energiförbrukning genomfördes baserat på testdata från Skogforsk. Denna undersökning gav en inblick i prestandan hos hydraulmotorn Parker F11-19 vid kapnng av träd med varierande diameter, samt en kvantifiering av mängden energi som används av skördarhuvudets olika komponenter. Hydrauliska och mekaniska modeller av skördarhuvudet skapades med hjälp av simuleringsverktygen Hopsan och Simulink. Dessa modeller användes för att verifiera optimeringsförslagen. Resultatet av denna studie är fyra optimeringslösningar för ett skördarhuvud. Det första förslaget är att använda en ackumulator för kinetisk energiåtervinning i matningsrullarna, vilket kommer att bidra med en minskning av energiförbrukningen med 6.85%. Det andra förslaget är att optimera sågcylinderns position, vilket kommer leda till en reduktion med 0%, dvs aktuell position bedöms vara optimal. Det tredje förslaget är förändring av kvistknivarnas utformning, vilket minskar energiförbrukningen med 2.72%. Det fjärde förslaget är att använda en alternativ motor som kräver mindre energi, vilket bidrar till en markant minskning av energiförbrukningen med 28.4%. Totalt kommer de föreslagna förändringarna att resultera i en reduktion av energiförbrukningen med 37.9%. Resultatet är teoretiskt och ytterligare fält- och riggprov är nödvändiga för att validera resultaten.
This report is the result of the Master of Science thesis project developed for KTH Royal Institute of Technology in collaboration with the Forestry Research Institute of Sweden (Skogforsk) for the Forestry Master Thesis School 2016. The purpose is to analyze the tree cutting process of a harvester machine, optimize the energy consumption and propose modifications to the system of components if applicable. A study on the energy usage of a harvester head was performed based on test data gathered by Skogforsk, providing insight about the performance of the hydraulic motor Parker F11-19 when cutting different tree diameters and quantifying the amount of energy used on each part of the harvester head. Hydraulic and mechanical models of the head were built using Hopsan and Simulink, respectively. These models were used for the verification of the optimizations proposed. The results from this research study are four optimization solutions for a harvester head. The first suggestion is to use an accumulator for kinetic energy recovery in the feeding rollers, which will contribute with a reduction in energy consumption of 6.85%. The second suggestion is to optimize the saw’s cylinder position, which did not provide any improvements. The third suggestion is a redesign of the delimbing knives, which will reduce the energy consumption with 2.72%. And the final suggestion is to use an alternative motor that requires less power, which will result in a significant decrease of energy consumption by 28.4%. In total, the changes suggested will result in a reduction of the energy consumption by 37.9%. The results are theoretical and further testing in practice is needed in order to assess the veracity of the results.
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Baldassarri, Mirko. "Review of Vibration Energy Harvester." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2021.

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This work presents a state-of-the-art on vibration energy harvesting that is one of the hottest topics addressed by a big part of the scientific community to minimize the requirement of external power source. A lot of transduction mechanisms have been investigated and designed by researchers, based on different mechanical systems and transduction principles, in order to recover energy coming from environmental vibrations. This dissertation is intended to illustrate and analyse the main findings in order to highlight the critical aspects of this technology and the key challenges for further developments. Firstly, a classification of vibration energy harvesters (VEHs) based on their "oscillating structures" and "transduction mechanisms" is provided, corresponding to the most widely used mathematical reference model and transduction devices, respectively. Then, the most common examples of application of such devices is presented to illustrate how vibrations of the surrounding environment can be converted into electrical energy exploited for different intended uses. Based on this survey, the limitations of the simplest devices are discussed, the most important of which is the ineffectiveness of VEHs when prompted by vibrations with a frequency even slightly different from the device resonance frequencies, (which is a common scenario, since environmental vibrations are often random and broadband). To solve this problem, researchers are currently focusing on developing efficient VEHs by adopting new materials and optimising the harvesting devices. The recent prototypal devices appear promising, but the achievement of robust solutions for real practical applications still seems a long-term goal, due to the limited capability of current technology to harvesting meaningful levels of electrical energy.
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Eliasson, Lars. "Analyses of single-grip harvester productivity /." Umeå : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 1998. http://epsilon.slu.se/avh/1998/91-576-5614-2.gif.

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Hajati, Arman. "Ultra wide-bandwidth micro energy harvester." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/63072.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2011.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 189-197).
An ultra wide-bandwidth resonating thin film PZT MEMS energy harvester has been designed, modeled, fabricated and tested. It harvests energy from parasitic ambient vibration at a wide range of amplitude and frequency via piezoelectric effect. At the present time, the designs of most piezoelectric energy devices have been based on high-Q linear cantilever beams that use the bending strain to generate electrical charge via piezoelectric effect. They suffer from very small bandwidth and low power density which prevents them from practical use. Contrarily, the new design utilizes the tensile stretching strain in doubly-anchored beams. The resultant stiffness nonlinearity due to the stretching provides a passive feedback and consequently a wide-band resonance. This wide bandwidth of resonance enables a robust power generation amid the uncertainty of the input vibration spectrum. The device is micro-fabricated by a combination of surface and bulk micro-machining processes. Released devices are packaged, poled and electro-mechanically tested to verify the wide-bandwidth nonlinear behavior of the system. Two orders of magnitude improvement in bandwidth and power density is demonstrated by comparing the frequency response of the system with that of an equivalent linear harvester with a similar Q-factor.
by Arman Hajati.
Ph.D.
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Larson, Geremy. "Self-propelled forage harvester sales analysis." Thesis, Kansas State University, 2015. http://hdl.handle.net/2097/35746.

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Master of Agribusiness
Department of Agricultural Economics
Major Professor Not Listed
Self-propelled forage harvesters are used to make feed for livestock. Producers prefer forage made with these machines because they are able to deliver a feed value that enables improved productivity of their animals in terms of milk production for dairy animals and weight gain for beef animals. Self-propelled forage harvesters are able to make a variety of feed from different crops, including whole-plant corn silage, earlage, and haylage, among others. The self-propelled forage harvester is a complex and expensive piece of machinery for a producer to own. The self-propelled forage harvester market in the United States is a growing market, but small when compared to other equipment such as combines. In today’s environment, productivity is crucial to the success of the agricultural producer. Self-propelled forage harvesters are no exception. Growth of the self-propelled forage harvester market is reflected in increased unit sales, total horsepower sold, and average horsepower of the selfpropelled forage harvesters sold in the United States. This study looks at changes in the number and size of self-propelled forage harvesters being purchased and what factors might be driving those changes. This study found that the amount of milk produced, the type of customer purchasing the equipment, and the average price of milk a producer received explained 81.2% of the variation in the number of self-propelled forage harvesters sold from 2000- 2014. Study results also show that the size of dairy operation, the type of customer purchasing the equipment, and the average price of milk explained 88% of the variability in total horsepower of self-propelled forage harvesters sold from 2000-2014. Finally, the size of dairy operation that a typical cow comes from, the type of customer purchasing the equipment, and the average price of corn were able to explain 98% of the variation of average horsepower of self-propelled forage harvesters over that same time period. The model and analysis will be shared with product planners from John Deere as they develop new machine specifications for self-propelled forage harvesters in the future.
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Smith, Christopher Ryan. "Florida harvester ants and their charcoal." [Tallahassee, FL : Florida State University], 2004. http://etd.lib.fsu.edu/theses/available/etd-06282004-170836.

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Thesis (M.S.)--Florida State University, 2004.
Advisor: Dr. Walter R. Tschinkel, Florida State University, College of Arts and Sciences, Dept. of Biological Science. Title and description from dissertation home page (viewed Sept. 24, 2004). Includes bibliographical references.
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Michelon, Dino. "UHF energy harvester in CMOS technology." Thesis, Aix-Marseille, 2016. http://www.theses.fr/2016AIXM4322.

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Un des défis majeurs de l’Internet des Objets et, plus généralement, des tous les réseaux de capteurs sans fils, c’est l’alimentation de chaque nœud connecté. La solution la plus commune est d’équiper chaque dispositif d’une batterie mais cela introduit plusieurs contraintes, qui mettent en question la faisabilité de cette approche sur le long terme (durée de vie limité, couts de gestion élevé, empreinte écologique).Cette thèse développe une possible solution basée sur la transmission sans-fils de l’énergie. Un récupérateur d’énergie RF, composé d’une antenne, un redresseur haute-fréquence et un convertisseur élévateur, est présenté. Ce système permet de récupérer les ondes électromagnétiques et de produire une tension continue en sortie, qui peut être utilisé pour alimenter des microcontrôleurs ou des capteurs. L’absence d’une batterie interne augmente la flexibilité globale, surtout pour les situations où le remplacement n’est pas possible (ex. dispositifs implantés, nombre élevé de nœuds, milieux dangereux). Une étude approfondie sur les redresseur intégrés ultra-haute-fréquence de type Schottky et MOS a été mené ; plusieurs topologies ont été analysées et optimisées. De plus, l’utilisation d’un convertisseur élévateur a été envisagée, dans le but d’accroitre la tension en sortie ; une première version discrète et puis une plus compacte version intégrée, ont été abordées et testées. Ces développements ont permis d’aboutir à un récupérateur complet, potentiellement capable d’alimenter un microcontrôleur du commerce
One of the challenges of the Internet of Things and, more in general, of every wireless sensor network is to provide electrical power to every single one of its smart nodes. A typical solution uses batteries but various major concerns reduce the long-term feasibility of this approach (limited lifetime, maintenance and replacement costs, and environmental footprint).This thesis develops a possible solution based on the wireless transmission of power. A complete RF harvester composed of an antenna, a UHF rectifier and a step-up voltage converter is presented. This system captures electromagnetic waves and converts them to a stable DC voltage to supply power to common logic circuits like microcontrollers and sensors. The lack of an internal battery provides an extended flexibility, especially when its replacement is not a viable option (ex. implanted devices, large number of nodes, dangerous environments, etc.). An in-depth study of integrated Schottky and CMOS UHF rectifiers is carried out; various topologies and optimizations are analyzed. Moreover, the use of an additional step-up converter is proposed in order to increase the system output voltage; an early discrete implementation and a final, more compact, integrated version are discussed and tested. These developments lead to a complete system capable of potentially powering an application with an off-the-shelf microcontroller
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Hehn, Thorsten [Verfasser], and Yiannos [Akademischer Betreuer] Manoli. "A CMOS Integrated Interface Circuit for Piezoelectric Energy Harvesters = Eine CMOS-Integrierte Schnittstellenschaltung für Piezoelektrische Energy Harvester." Freiburg : Universität, 2014. http://d-nb.info/1123479119/34.

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Deterre, Martin. "Toward an energy harvester for leadless pacemakers." Phd thesis, Université Paris Sud - Paris XI, 2013. http://tel.archives-ouvertes.fr/tel-00868838.

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This work consists in the development and design of an energy harvesting device to supply power to the new generation pacemakers, miniaturized leadless implants without battery placed directly in heart chambers. After analyzing different mechanical energy sources in the cardiac environment and associated energy harvesting mechanisms, a concept based on regular blood pressure variation stood out: an implant with a flexible packaging that transmits blood forces to an internal transducer. Advantages compared to traditional inertial scavengers are mainly: greater power density, adaptability to heartbeat frequency changes and miniaturization potential. Ultra-flexible 10-µm thin metal bellows have been designed, fabricated and tested. These prototypes acting as implant packaging that deforms under blood pressure actuation have validated the proposed harvesting concept. A new type of electrostatic transducer (3D multi-layer out-of-plane overlap structure with interdigitated combs) has been introduced and fully analyzed. Promising numerical results and associated fabrication processes are presented. Also, large stroke optimized piezoelectric spiral transducers including their complex electrodes patterns have been studied through a design analysis, numerical simulations, prototype fabrication and experimental testing. Apower density of 3 µJ/cm3/cycle has been experimentally achieved. With further addressed developments, the proposed device should provide enough energy to power autonomously and virtually perpetually the next generation of pacemakers.
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Books on the topic "Harvester"

1

The harvester. Bloomington: Indiana University Press, 1987.

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Taber, Stephen Welton. The world of the harvester ants. College Station, Texas: Texas A&M University Press, 1998.

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Vintage International Harvester tractors. Stillwater, MN, U.S.A: Town Square Books, 1997.

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Keville, B. J. Short rotation harvester/chipper. Luxembourg: Commission of the European Communities, 1986.

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Klancher, Lee. International Harvester photographic history. Osceola, WI: Motorbooks International, 1996.

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Lawrence, Otto R. Harvester of the sea. St. John's, Nfld: H. Cuff, 1996.

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1951-, Wells Allen, ed. Yucatán y la International Harvester. Mérida, Yucatán, México: Maldonado Editores, 1986.

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International-Harvester tractor data book. Osceola, WI, USA: Motorbooks International Publishers, 1997.

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Wendel, C. H. 150 years of International Harvester. Osceola, WI: Motorbooks International, 1993.

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Seifert, Brandon, and Eric Battle. Harvester. Legendary Comics, 2015.

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Book chapters on the topic "Harvester"

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Capinera, John L., Thomas O. Crist, John B. Heppner, Minos E. Tzanakakis, Severiano F. Gayubo, Aurélien Tartar, Pauline O. Lawrence, et al. "Harvester Ants." In Encyclopedia of Entomology, 1768. Dordrecht: Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-6359-6_1266.

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Heppner, John B., John B. Heppner, Minos E. Tzanakakis, Minos E. Tzanakakis, Minos E. Tzanakakis, Pauline O. Lawrence, John L. Capinera, et al. "Old World Harvester Termites." In Encyclopedia of Entomology, 2664. Dordrecht: Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-6359-6_1831.

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Tzou, Hornsen. "Tubular Shell Energy Harvester." In Piezoelectric Shells, 385–407. Dordrecht: Springer Netherlands, 2018. http://dx.doi.org/10.1007/978-94-024-1258-1_12.

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Zoolfakar, Md Redzuan, and Ismail Ibrahim Chacha. "A Water Hyacinth Harvester." In Advanced Engineering for Processes and Technologies II, 193–207. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-67307-9_18.

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Alhawari, Mohammad, Baker Mohammad, Hani Saleh, and Mohammed Ismail. "Polarity Mechanism for Thermoelectric Harvester." In Analog Circuits and Signal Processing, 61–79. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-62578-2_5.

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Hehn, Thorsten, and Yiannos Manoli. "Piezoelectricity and Energy Harvester Modelling." In CMOS Circuits for Piezoelectric Energy Harvesters, 21–40. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-017-9288-2_2.

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Rajarathinam, M., P. V. Malaji, and Shaikh Faruque Ali. "A Nonlinear Hybrid Energy Harvester." In Lecture Notes in Mechanical Engineering, 605–14. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5693-7_42.

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Nayal, Rajat, and Anshul Sharma. "Mechanism-Driven Piezoelectric Energy Harvester." In Lecture Notes in Mechanical Engineering, 543–52. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-4018-3_51.

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Capinera, John L., Thomas O. Crist, John B. Heppner, Minos E. Tzanakakis, Severiano F. Gayubo, Aurélien Tartar, Pauline O. Lawrence, et al. "Harvester Ants, Pogonomyrmex Mayr (Hymenoptera: Formicidae)." In Encyclopedia of Entomology, 1769–71. Dordrecht: Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-6359-6_1267.

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Ramadoss, Tamil Selvan, and Seeram Ramakrishna. "Human Vibration Energy Harvester with PZT." In Nanotechnology for Energy Sustainability, 649–78. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2017. http://dx.doi.org/10.1002/9783527696109.ch27.

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Conference papers on the topic "Harvester"

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Pedchenko, Alexander V., and Eric J. Barth. "Broad Frequency Vibration Energy Harvesting Control Approach Based on the Maximum Power Transfer Theorem." In ASME 2013 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/dscc2013-3981.

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A control law for an electromagnetic vibration energy harvester is derived using the maximum power transfer theorem. Using regenerative electronics, the controller cancels the reactive portion of the harvester’s impedance by eliminating the effect of mechanical inertia and stiffness elements, and the coil’s electrical inductive element. The result is an energy harvester approach that captures more vibrational energy than a passive tuned harvester. It is shown that the controlled system acts like an infinite series of passive harvesters tuned to all frequency components within a certain frequency range. The control approach also avoids the delay and computational overhead of a Fast Fourier Transform as it does not require the explicit calculation of the excitation frequency. An experimental prototype harvester was built and characterized. The prototype’s multi-domain dynamics were modeled using bond-graph techniques, and its behavior as a passive harvester was experimentally validated. The prototype’s behavior under the proposed control method is simulated and compared to the passive case. It is shown that the proposed control method harvests more power for a range of excitation frequencies than the passive harvester.
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Doria, Alberto. "Framed Harvesters for Collecting Energy From Vibrations in Industrial Plants." In ASME 2019 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/detc2019-97291.

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Abstract The idea of increasing the number of resonance conditions of a cantilever piezoelectric harvester by coupling the harvester with a frame that surrounds the harvester’s body is presented and discussed. Experimental tests on prototypes show that it is possible to design framed harvesters able to generate significant powers at two frequencies. Since the framed harvesters will be used for harvesting energy from periodic vibrations characterized by multiple harmonics, a tuning method is needed. For this reason a numerical sensitivity analysis is performed to analyze the effect on harvester tuning of small masses mounted on the frame. A prototype tuned to 40 and 80 Hz is developed and tested, its performance is compared with the one of a system of two simple harvesters tuned to the same frequencies.
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Masana, Ravindra, and Mohammed F. Daqaq. "Comparing the Performance of a Nonlinear Energy Harvester in Mono- and Bi-Stable Potentials." In ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/detc2011-47828.

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The quest to develop broadband vibratory energy harvesters (VEHs) has recently motivated researchers to explore introducing nonlinearities into the harvester’s design. Some research efforts have demonstrated that this new class of nonlinear harvesters can outperform their traditional linear (resonant) counterparts; some others however concluded that nonlinearities can diminish the harvester’s transduction. Through this effort, we compare the performance of a nonlinear VEH operating in mono- and bi-stable potentials. With that objective, we consider an axially-loaded clamped-clamped piezoelectric beam which functions as an energy harvester in the mono-stable (pre-buckling) and bistable (post-buckling) configurations. For the purpose of fair performance comparison, the oscillation frequency around the stable equilibria of the harvester is tuned to equal values in both configurations. The harvester is then subjected to harmonic base excitations of different magnitudes and a slowly-varying frequency which spans a wide range around the tuned oscillation frequency. The output voltage measured across an arbitrarily chosen electric load is used as a relative performance measure. Both numerical and experimental results demonstrate that the shape of the potential function plays an essential role in conjunction with the magnitude of the base excitation to determine whether the bi-stable harvester can outperform the mono-stable one and for what range of frequencies.
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Doria, Alberto, Federico Moro, and Domenico Tommasino. "Vibration Energy Harvesting in Light Vehicles: Road Tests and Interpretative Models." In ASME 2022 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/detc2022-89093.

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Abstract The interest towards piezoelectric energy harvesters has been fostered in recent years by the development of ultra-low power electronics. An experimental analysis approach based on modal testing is here proposed in order to detect the best position on a bicycle of a piezo-harvester. Road tests show that vibrations are in the low frequency range so that the energy harvester has to be properly tuned to get its largest electrical response. Different tuning strategies of the same piezo-harvester, mounted in the best location, are tested and compared. The best setup is selected by considering as figures of merit the average stress inside the piezo-layer of the harvester (which affects its lifespan) and the maximum electric power which can be harvested. These figures are both analytically estimated from the measured power spectral density of the output open circuit voltage, which is experimentally determined. It is shown that the configuration with the largest tip mass provides the largest delivered power. Nevertheless, in order to preserve the device lifespan, harvesters with oscillator and liquid tip mass may represent a good tradeoff between the amount of generated stress and delivered power. The methods presented in this paper can be also adopted for predicting the behavior of harvesters mounted on other light vehicles.
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Bibo, Amin, and Mohammed F. Daqaq. "New Insights Into the Performance and Optimization of Galloping Flow Energy Harvesters." In ASME 2014 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/smasis2014-7453.

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This paper presents a generalized formulation, analysis, and optimization of energy harvesters subjected to galloping and base excitations. The harvester consists of a cantilever beam with a bluff body attached at the free end. A nondimensional lumped-parameter model which accounts for the combined loading and different electro-mechanical transduction mechanisms is presented. The aerodynamic loading is modeled using the quasi-steady assumption with polynomial approximation. A nonlinear analysis is carried out and an approximate analytical solution is obtained. A dimensional analysis is performed to identify the important parameters that affect the system’s response. It is shown that the response curves of the harvester can be generated in terms of only three dimensionless loading parameters. These curves can serve as a complete design guide for scaling and optimizing the performance of galloping-based harvesters. As a special case study, a harvester subjected to only galloping excitations is analyzed. It is shown that, for a given shape of the bluff body and under quasi-steady flow conditions, the harvester’s dimensionless response can be described by a single universal curve irrespective to the geometric, mechanical, and electrical design parameters of the harvester. The universal curve is utilized to obtain the optimal harvesting circuit design parameters, that minimize the cut-in wind speed and maximize the output power, and predict the harvester’s total conversion efficiency.
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Sharghi, Hesam, Jean-François Daneault, and Onur Bilgen. "A Wearable Biomedical Motion Sensor Employing a Vibration Energy Harvester." In ASME 2019 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/smasis2019-5634.

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Abstract Wearable motion sensors find a great number of applications in the biomedical field by recording real-time movements and transferring data to mobile electronics. Patients with hyperkinetic movements is a group of interest for such sensors to survey their conditions for long periods. Longer and more frequent recording intervals are necessary to diagnose and treat patients’ disease. Mobile battery-operated motion sensors have a limited recording span, and they need to be charged frequently, which is inconvenient for most of the patients. In this study, vibration energy harvesters are employed to extend the battery life of motion sensors: one step closer to make autonomous sensors without chargers. A vibration energy harvester is designed for a motion sensor to harvest energy from involuntary movements of patients with hyperkinetic movements. An analytical model for charging and discharging cycles is developed to predict the battery life based on the amount of harvested power. Preliminary data from commercial devices are used as a foundation for the design and the current feasibility study.
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Masana, Ravindra, and Mohammed F. Daqaq. "Performance of a Randomly-Excited Nonlinear Energy Harvester in Mono- and Bi-Stable Potentials: An Experimental Investigation." In ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/detc2012-71451.

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This paper aims to experimentally investigate the influence of stiffness-type nonlinearities on the transduction of vibratory energy harvesters (VEHs) under random white and colored excitations. For the purpose of the study, an energy harvester consisting of a clamped-clamped piezoelectric beam bi-morph is considered. The shape of the harvester’s potential function is altered by applying a static compressive axial load at one end of the beam. The axial load permits the harvester to operate with different potential energy characteristics; namely, the mono-stable (pre-buckling) and bi-stable (post-buckling) configurations. The performance of the harvester in both configurations is investigated and compared by tuning the harvester’s oscillation frequencies around the static equilibria such that they have equal values in both scenarios. The harvester is then subjected to random base excitations of different levels, bandwidths, and center frequencies. The variance of the output voltage is measured across an arbitrary, purely resistive load and used for the purpose of performance comparison. Critical conclusions pertinent to the influence of the nonlinearity and relative performance in both configurations are presented and discussed.
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Varoto, Paulo S., and Andreza T. Mineto. "Nonlinear Dynamics of Piezoelectric Cantilever Energy Converters Through Perturbation Theory and Experimental Analysis." In ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/detc2014-34744.

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It is known that the best performance of a given piezoelectric energy harvester is usually limited to excitation at its fundamental resonance frequency. If the ambient vibration frequency deviates slightly from this resonance condition then the electrical power delivered is drastically reduced. One possible way to increase the frequency range of operation of the harvester is to design vibration harvesters that operate in the nonlinear regime. The main goal of this article is to discuss the potential advantages of introducing nonlinearities in the dynamics of a beam type piezoelectric vibration energy harvester. The device is a cantilever beam partially covered by piezoelectric material with a magnet tip mass at the beam’s free end. Governing equations of motion are derived for the harvester considering the excitation applied at its fixed boundary. Also, we consider the nonlinear constitutive piezoelectric equations in the formulation of the harvester’s electromechanical model. This model is then used in numerical simulations and the results are compared to experimental data from tests on a prototype. Numerical as well as experimental results obtained support the general trend that structural nonlinearities can improve the harvester’s performance.
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Arroyo, Emmanuelle, Shaohui Foong, Luc Maréchal, and Kristin L. Wood. "Experimental Study of an Omni-Directional Wind Fluttering Energy Harvester." In ASME 2014 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/dscc2014-5916.

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Wind energy harvesters based on fluttering are a valuable and efficient alternative to traditional wind turbines. The optimized drive trains of traditional wind turbines have significantly shorter life expectancy and higher fabrication costs compared to harvesting systems based on fluttering. This article presents an analysis of a novel windbelt type energy harvester designed to harvest low-speed and changing direction winds. This experimental study explores the optimal ribbon tension, length and coil position of the wind-to-vibration converter, to obtain the maximum vibration acceleration.
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Doria, Alberto, Cristian Medè, Daniele Desideri, Alvise Maschio, and Federico Moro. "Improvement of Harvesters for Tires by Means of Multi-Physics Simulation." In ASME 2017 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/detc2017-67301.

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The specific working conditions of piezoelectric harvesters for scooter tires are analyzed. Calculated and experimental results show that the excitation of the harvester can be considered a series of separated impulses. Harvester response to an ideal impulse is analyzed with a single-mode model. An optimal ratio between impulse duration and natural period of the harvester that maximizes harvester excitation is found. A numerical finite element (FE) model of a bimorph cantilever harvester is developed in COMSOL and validated by means of experimental tests. The validated FE model is used for showing that an actual harvester excited by road impulses generates a large voltage only if there is a specific relation between impulse duration and natural period of the harvester. Starting from the validated FE model, small harvesters suited to tires are developed and analyzed. Also these harvesters show the best performance for a specific range of impulse durations, which corresponds to the highest speeds of the speed range of the scooter (50–80 km/h) and to high levels of acceleration.
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Reports on the topic "Harvester"

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Skone, Timothy J. Tree Harvester, 241 HP, Construction. Office of Scientific and Technical Information (OSTI), May 2012. http://dx.doi.org/10.2172/1509212.

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Skone, Timothy J. Diesel Forage Harvester, 615 Horsepower, Construction. Office of Scientific and Technical Information (OSTI), January 2010. http://dx.doi.org/10.2172/1509044.

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Skone, Timothy J. Tree Harvester Chipper, 440 Horsepower, Construction. Office of Scientific and Technical Information (OSTI), January 2010. http://dx.doi.org/10.2172/1509211.

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Prasad, Nadipuram R., and Satishkuma J. Ranade. Final Report of the HyPER Harvester Project. Office of Scientific and Technical Information (OSTI), November 2015. http://dx.doi.org/10.2172/1306335.

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Skone, Timothy J. Harvester, 300-Bushel Capacity, 6 Cylinder, Construction. Office of Scientific and Technical Information (OSTI), December 2009. http://dx.doi.org/10.2172/1509069.

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Gano, K. A., D. W. Carlile, and L. E. Rogers. Harvester ant bioassay for assessing hazardous chemical waste sites. [Pogonomyrmex owhyeei]. Office of Scientific and Technical Information (OSTI), May 1985. http://dx.doi.org/10.2172/5742755.

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Baechler, Britta. Microplastics in Pacific Northwest Bivalves: Ecological Prevalence, Harvester-Consumer Exposure, and Aquarium Exhibit Outcomes. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.7488.

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van Dalfsen, P., A. van ‘t Ooster, J. A. Booij, M. P. J. van der Voort, A. Veldhuisen, A. T. Nieuwenhuizen, and J. A. L. M. Kamp. Model based performance analysis of a light weight autonomous potato harvester : Feasibility study of lightweight, autonomous potato harvest strategies by means of model experiments. Lelystad: Stichting Wageningen Research, Wageningen Plant Research, Business Unit Field Crops, 2021. http://dx.doi.org/10.18174/563388.

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Huyler, Neil K., and Chris LeDoux. Performance of a cut-to-length harvester in a single-tree and group selection cut. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Research Station, 1999. http://dx.doi.org/10.2737/ne-rp-711.

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Research Institute (IFPRI), International Food Policy. Gender and agricultural mechanization: A mixed-methods exploration of the impacts of multi-crop reaper-harvester service provision in Bangladesh. Washington, DC: International Food Policy Research Institute, 2019. http://dx.doi.org/10.2499/p15738coll2.133260.

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