Thematische Bibliographien / Quality of pneumatic cylinders

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  2. Dissertationen
  3. Bücher
  4. Buchteile
  5. Konferenzberichte

Auswahl der wissenschaftlichen Literatur zum Thema „Quality of pneumatic cylinders“

Autor: Grafiati
Veröffentlicht am 28. Juni 2021
Zuletzt aktualisiert am 3. Februar 2022

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Zeitschriftenartikel zum Thema "Quality of pneumatic cylinders"

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Guo, Jun Zhong, und Jun Ping Yang. „Impact Analysis of Piston Velocity to Cylinders Motion on Pneumatic Impression On-Off Mechanism of Sheet-Fed Offset Press“. Advanced Materials Research 215 (März 2011): 327–31. http://dx.doi.org/10.4028/www.scientific.net/amr.215.327.

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The impression on-off mechanism is an important part of the offset press, the design and manufacture have relationship with the performance of the printing presses and the quality of the printed products. Pneumatic impression on-off mechanism has the advantages of high position accuracy, reliable and highly automation. This article takes pneumatic impression on-off mechanism as the object of study, the three-dimensional digital model of the impression on-off mechanism is established and the process of on-off pressure is analyzed by using ADAMS software, the piston minimum velocity when the cylinders rotates in different angular velocity is obtained, through simulation, the relation between the motion of impression on-off mechanism and cylinder angular displacement is analyzed. Finally, an important basis to adjust the piston velocity under different speed of cylinders rotation will be provided.
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Wang, Fang, und Hong Chen. „Design and Research on the Clutch Mechanism in Modern Offset Printing Machine“. Advanced Materials Research 694-697 (Mai 2013): 128–32. http://dx.doi.org/10.4028/www.scientific.net/amr.694-697.128.

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The clutch mechanism is the important part of printing machine. At present, cam connecting rod type mechanical clutch mechanism has been used by most of the domestic offset printing machine and its mechanical structure is very complex and its reliability is very poor. So a new type of pneumatic clutch mechanism is designed to meet its technological requirements. For the new mechanism, the motion law of the blanket cylinder can be calculated in the pressing process by complex number vector method and the finite element model has been established, natural frequency, maximum amplitude and mode of vibration of the cylinder can be calculated based on Block Lanczos method. The analysis results show that the relationship between the cylinders is flexible impact at the pressing instant, positioning is accurate, stable and reliable, which meets flexible design requirements. Thus it is important significance to improve design level and the product quality of the domestic printing machine and shorten the gap with foreign advanced printing machine.
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Jianqiang, Xu. „Research on Pneumatic Servo Control for Double-Cylinder Collaborative Loading Based on Neural Network“. Open Electrical & Electronic Engineering Journal 8, Nr. 1 (31.12.2014): 512–21. http://dx.doi.org/10.2174/1874129001408010512.

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The pneumatic control system for double-cylinder collaborative loading is extensively applied in the industry. However, compared to the hydraulic system, it is difficult for the pneumatic system for double-cylinder collaborative loading to get satisfactory effect due to strong non-linearity and low rigidity. To improve robustness of the double-cylinder collaborative loading system and increase its control precision, the double-looped PID hybrid controller and doublevariable neural network PDI controller are designed. The comparative test is performed for them in research. The research results indicate that the neutral network control is strongly adaptive to the unknown, uncertain and non-linear features of the controlled objects, can effectively overcome unfavorable influences of the non-linear factors on the system, and improve the control quality.
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Šešlija, Dragan, Stanimir Čajetinac, Vladislav Blagojević und Jovan Šulc. „Application of pulse width modulation and by-pass valve control for increasing energy efficiency of pneumatic actuator system“. Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering 232, Nr. 10 (08.06.2018): 1314–24. http://dx.doi.org/10.1177/0959651818780858.

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Control of a pneumatic actuator using pulse width modulation (control) represents a good alternative for control of pneumatic actuator that uses proportional valve. Important advantage of pulse width modulation control is fewer consumption of compressed air. In addition, air consumption can be further reduced by the use of inter-chamber cross flow (chamber by-passing). This article discusses joint application of pulse width modulation and by-pass chamber control on the example of pneumatic rodless cylinder which is controlled by programmable logic controller. Saving of compressed air was experimentally determined, as well as the influence of inter-chamber cross flow on the quality of the control. With this application of pulse width modulation and by-pass valve control, pneumatic actuator system shows that 30% of energy can be saved under the same working conditions in comparison to the traditional pulse width modulation control system.
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Guo, Jun Zhong, und Jun Ping Yang. „Simulation Analysis of Pneumatic on-off Pressure Mechanism on Printing Press“. Advanced Materials Research 154-155 (Oktober 2010): 1481–84. http://dx.doi.org/10.4028/www.scientific.net/amr.154-155.1481.

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The on-off pressure mechanism has an important function to the printing press, the quality of which concerns the working performance of the printing machine and the quality of printed products directly. In this paper, the pneumatic on-off pressure mechanism is discussed; the work demand of order on-off pressure is analyzed. In addition, the three-dimensional digital model and the kinematic analysis process can be achieved on the basis of ADAMS software. What’s more, the on pressure value in the process of on pressure is derived from the kinematic analysis. Lastly, the relation between the motion of on-off pressure mechanism and cylinder’s angular displacement is analyzed, an important basis to the on-off pressure mechanism’s optimal design will be provided.
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SASAKI, Katsumi, und Yusuke TANAKA. „3202 Riding Quality up on the Tilting train : Phase 2 Structure and Characteristics of Pneumatic Cylinder“. Proceedings of the Transportation and Logistics Conference 2000.9 (2000): 185–88. http://dx.doi.org/10.1299/jsmetld.2000.9.185.

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7

Posmetev, Valeriy, Vadim Nikonov, Vladimir Zelikov und Viktor Posmetev. „TWO-FACTOR PARAMETER OPTIMIZATION OF PROMISING MODULAR HYDROPNEUMATIC SUSPENSION FOR LOGGING ROAD TRANSPORT“. Forestry Engineering Journal 10, Nr. 3 (02.10.2020): 175–84. http://dx.doi.org/10.34220/issn.2222-7962/2020.3/17.

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The necessity to reduce the cost of timber haulage by logging road transport to increase the efficiency of logging in the Russian Federation has been substantiated. The drawbacks of the timber road transport equipped with traditional suspension systems, which are manifested when they transport timber along low quality logging roads, have been revealed. A promising direction for improving the operational properties of timber road transport used for hauling timber is described. It consists in the development of effective design schemes for suspensions for timber road transport with optimal suspension parameters. The scientific works of foreign scientists in this direction has been considered. Taking into account the identified shortcomings, a promising scheme of modular hydropneumatic suspension for timber road transport has been developed, which makes it possible to recuperate the energy of the working fluid when moving on the roads of low quality, compensate for leaks of working fluid, and also control the ground clearance from the driver's cab remotely. Two-factor optimization has been carried out, which allows identifying favorable combinations of the two factors under study. The graphs of the influence of the pneumatic cylinder diameter heat transfer coefficient on the maximum vertical acceleration of the sprung mass, as well as on the maximum gas pressure in the pneumatic cylinder and the amplitude of the temperature change have been obtained. The cartograms of optimization of the design parameters for perspective hydropneumatic suspension have been presented.
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Böllhoff, J., T. Heß, J. Metternich und S. Seifermann. „Qualität in der Sequenzfertigung*/Quality in cellular manufacturing - Evaluation and discussion of the process capability in a lean machining cell“. wt Werkstattstechnik online 105, Nr. 01-02 (2015): 13–19. http://dx.doi.org/10.37544/1436-4980-2015-01-02-15.

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In der Zerspanung kann das häufige Umspannen eines Bauteils, wie es die Sequenzfertigung erfordert, eine signifikante Herausforderung für die Maßhaltigkeit eines Fertigungsergebnisses sein. Nach einer kurzen Erläuterung des Konzepts der Sequenzfertigung stellt der Fachartikel die Ergebnisse der Prozessfähigkeitsbewertung einer Sequenzfertigungslinie dar, auf welcher der Boden eines Pneumatikzylinders gefertigt wird. Es wird gezeigt, dass dieses Konzept auch qualitätsperspektiv interessante Einsatzgebiete besitzt.   In machining, a high amount of clamping operations, as they are required when applying the concept of cellular manufacturing, may have a negative impact on the part quality. After a short introduction to cellular manufacturing this paper presents the results of a process capability study in a cellular manufacturing area where the bottom of a pneumatic cylinder is produced. It is shown that there are interesting fields of application for this concept, also from a quality point of view.
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Hsieh, Ming-Chu, und Zhen-Hong Khong. „Design and analysis for manipulator fixture applications“. MATEC Web of Conferences 185 (2018): 00031. http://dx.doi.org/10.1051/matecconf/201818500031.

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The manipulators arms are the most important components in automatic machinery and equipment. These arms must conform to product requirements and match important accessory devices such as clamping jaw so that the entire process operates properly. Therefore the most important issue is that the manipulator arm has only one clamping jaw, followed by other issues such as welding and related features. In this research the manipulator arm of automated machinery with attached equipment was optimized, and the design serves as an object of study for multifunctional applications. This research emphasizes on customized manipulator design to create products with distinguished styles and characteristics, and serve as a basis for an improvement on innovative design. Manipulator arms from different manufacturers with various head-disc size and screw-hole locations were investigated, and concept of human palm was incorporated in the design to create a mechanical fixture that can be fitted into the arm. Overall design including main body of the manipulator, pneumatic cylinder set, gear and connecting rod combination, planet gear set, and linkage rods and fixture. These components were combined to offer the functions of the manipulator. Commercial software package, SolidWorks, was used to construct the model for the manipulator arm, and CAE analysis was implemented to identify the stress on the structure and possible interferences of the mobile components. Stress analysis was also performed on the gear set under pneumatic loading to ensure that the gear mechanism has a sufficient strength. The results of this study showed that an arc shaped manipulator body is the most easily handled during installation and most effectively controlled during operation. The simple profiles of the manipulator also lower the space required for storage. The design of the gear set and integrated application of the shaft helps prevent loosening of gear and shaft during operation. In this study, a manipulator was designed with three different functions, each fixture is powered by an isolated pneumatic cylinder, and this mechanism can be manipulated to form o0to o180clamping action in accordance with requirements of the task. The methods and results of this study serve as a reference for machinery industry to achieve high quality product, and also as a basis for innovative design.
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GOLUBKOV, A. S., O. A. SIDOROV und S. N. SMERDIN. „Ways to improve the efficiency of automatic control systems of pressing current collectors for railway service of high speeds“. Vestnik of the Railway Research Institute 78, Nr. 2 (05.06.2019): 74–81. http://dx.doi.org/10.21780/2223-9731-2019-78-2-74-81.

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One of the limiting factors in increasing train speeds on railway transport is the quality of current collection. With increasing operation speeds, the dynamic loads on the current collector from the rolling stock increase and the aerodynamic impact increases as well, which leads to an increase in the variation of the contact pressure, tearing off the current collector from the contact wire, arcing in contact and increased wear of the contact elements. A promising direction in addressing this issue is the use of automatic control systems, allowing to stabilize the amount of contact pressure. The article discusses the features of modern automatic control systems for pressing current collectors, its main disadvantages are indicated. Authors proposed new automatic control circuit for pressing a current collector, characterized by increased speed. A mathematical model of a current collector equipped with a high-speed automatic pressure control system is described. The results of the calculation of the parameters of the high-speed control system are presented, showing the possibility of its use in order to reduce the spread of the contact pressure of the current collector and improve the quality of the current collection at high speeds. Analysis of the characteristics of the transfer functions of the regulator shows that the application of the PI controller algorithm is effective for stabilizing the contact pressure. Since the rod length of the pneumatic cylinder is limited, the regulator is able to maintain pressure for a limited time, after which the rod must be returned to its original position. The speed of the rod is limited by the characteristics of the actuator (electric motor). These features cause a significant variation in system parameters, such as the time constant and the duration of maintaining a stable depression, depending on the values of the controller coefficients kp and ki, which should be set taking into account the parameters of the current collector, operating conditions and type of contact suspension. For the considered current collector model, the optimal values of the controller coefficients are kp = 1.5 and ki= 1.0. Results of the calculations showed that the use of a rapid regulator based on a pneumatic cylinder in the carriage design reduces the standard deviation of the contact pressure to 37 % at speeds of up to 260 km/h.
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Dissertationen zum Thema "Quality of pneumatic cylinders"

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Pabiška, Martin. „Zabezpečování kvality pneumatických válců“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-443749.

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This Master thesis deals with the requirements for the quality of ISO standard compliant pneumatic cylinders, which are machined and assembled by a local manufacturer. According to the philosophy of continuous improvement, this thesis describes the project to decrease the number of air leaks detected by automatic testing machines. The main benefits of the thesis are the improvement of the design of pneumatic cylinders and the improvement of their assembly procedure leading to a reduction in the number of air leaks from pneumatic cylinders on automatic test equipment. It also provides an overview and general procedure for selecting, analyzing, implementing measures and taking further opportunities to improve the quality management system of pneumatic cylinders in the company.
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Mahmoud, Houssam. „Diagnosis of Pneumatic Cylinders Using Acoustic Emission Methods“. Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-399214.

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Tato práce se zabývá vývojem nového efektivního diagnostického postupu pro kontrolu funkce pneumatických válců pomocí metody akustické emise. Cílem práce bylo navrhnout a určit diagnostická kritéria pro hodnocení kvality vybraných typů pneumatických válců. Prvním krokem bylo nalezení typického akustického emisního signálu, který je spojen s určitým typem poškození ve válci využitím frekvenčního spektra signálu. Později byl tento parametr nahrazen parametrem RMS během sledování změn v průběhu testů. Na konkrétních válcích byl sledován vztah mezi akustickou emisí a různými typy defektů a byl představen nový přístup k určování těchto typů vad a jejich odlišením v signálu akustické emise. Druhý krok studie že neporušené a poškozené válce byly porovnávány tak, aby se zjistily výrazné rozdíly, které určují, zda je válec poškozen nebo nepoškozen. Několik nepoškozených válců bylo testováno akustickou emisí a následně v nich byly vytvořeny umělé vady. Signály z vysouvání a zasouvání pístu byly zaznamenány a analyzovány pomocí řady parametrů. Na základě časového zpoždění a normalizace RMS byly rozpoznány odezvy mezi poškozenými a nepoškozenými pneumatickými válci. Rozdíly byly zjištěny porovnáním maximální hodnoty RMS ze snímače upevněného na předním víku válce a snímače upevněného na zadním víku válce pro jeden cyklus. Poškozené a nepoškozené válce byly rozlišeny pomocí rozdílů energetických hodnot přítomných v signálech z obou snímačů v závislosti na zdvihu pístu. Konečné vyhodnocení válce bylo určeno výpočtem celkové hodnoty RMS. Ve třetím kroku experimentu byly válce postupně zatěžovány různými závažími ve svislém směru. Signály akustické emise byly zaznamenány z vysouvání a zasouvání pístu a poté analyzovány. Časové zpoždění se vypočítává z digitálního vstupu a začátku pohybu pístu. Energie signálu a RMS akustické emise porovnávají různé reakce v poškozených a nepoškozených pneumatických válcích s a bez zatížení. Výsledky testu ukázaly lineární vztah mezi křivkou RMS a zatížením. Defekty ovlivňují vztah mezi aplikovaným zatížením a zaznamenaným signálem snímačů.
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Sharma, Akhil. „A New Multiple Input Random Excitation Technique Utilizing Pneumatic Cylinders“. University of Cincinnati / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1470671978.

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Li, Heping. „Microwave assisted osmotic dehydration of apple cylinders under continuous medium flow conditions for improving moisture transfer rate and product quality“. Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=85933.

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Microwave assisted osmotic dehydration (MWOD) under continuous medium flow conditions is a new process with good potential for quality optimization. It combines microwave process with osmotic dehydration and improves the mass transfer rate of osmotic dehydration process and product quality. The thesis describes the design and development of this process.
Preliminary studies on osmotic dehydration were carried out in two parts. First, the effects of processing time, temperature and solution concentration on mass transfer under conventional osmotic dehydration process were investigated and suitable ranges of parameters: 40-60°C, 40-60°Brix and 3h, for further osmotic dehydration kinetics study were identified. Then, the osmotic dehydration efficiency under continuous flow condition process was evaluated. For this, a continuous flow osmotic contactor was developed and found to be an efficient process in terms of osmotic dehydration of apple cylinders. Solids diffusivity (Ds) was lower in continuous flow osmotic dehydration process compared with conventional osmotic dehydration correspondents (P<0.05). Being a separate operation unit, the dehydration process and solution management can be done in a more efficient way in this process.
Following the preliminary studies, the osmotic contactor was relocated under a microwave oven so that heating and mass transfer operations could be facilitated by continuous microwave treatment providing a microwave assisted osmotic dehydration (MWOD) process. Compared with conventional osmotic dehydration (COD), moisture loss (ML%), solids gain (SG%) and mass transport coefficients (km and ks) of MWOD were improved, the average k m was increased 80% and the average ks was decreased 20%, respectively. Moreover, product rehydration property and color profile were improved. Microwave heating had an important effect on water transfer during the osmotic dehydration. Application of microwave heating to osmotic dehydration process facilitated in increasing moisture loss from the sample and simultaneously restricted the product's solute gain. Higher moisture loss in mass transfers area helped to control and strongly counters the solids gain.
Modeling of the mass transfer phenomenon is necessary to optimize osmotic dehydration processes to have a high product quality at minimum energy costs. To explain the simultaneous mass-flow in an osmo-dehydration process, evaluation of equilibrium kinetics is important. Pseudo-equilibrium (practical equilibrium) and dynamic period data are necessary for estimating the time of osmotic process, and ultimate mass transport of the solutes and water, and hence these data were gathered.
The effect of osmotic dehydration treatment on sample subsequent air drying behavior and product quality parameters were investigated. Compared with control samples, osmostically treated samples moisture diffusivity during subsequent air drying process was reduced over same moisture content range: from 1.18*10-9m2/s to 0.77*10-9--1.07*10 -9 m2/s. Drying rates of MWOD pretreated samples varied depending on treatment conditions. MWOD pretreatment shifted product's color profile to those that can be achieved under freeze drying conditions.
Sorption isotherms induced by osmotic dehydration were studied, using a gravimetric-static method, and fitted to GAB model. Adsorption isotherms of products were affected by drying method and osmotic dehydration pretreatment conditions. Adsorption isotherms of osmo-air dried apple cylinders followed type II isotherms (Sigma shaped curve). Monolayer (Mm) values of the osmo-air dried products were reduced. Sorption isotherms of osmotically treated-air dried products were shifted from the control isotherms.
Overall, this work has demonstrated potential of microwave heating for improving moisture transfer during osmotic dehydration and microwave osmotic treatment on subsequent air drying and resulting product quality, as well as the importance of equilibrium kinetics study in process modeling.
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Ameur, Omar. „Commande et stabilité des systèmes commutés : Application Fluid Power“. Thesis, Ecully, Ecole centrale de Lyon, 2015. http://www.theses.fr/2015ECDL0032/document.

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Ces travaux portent sur la commande et l’analyse de la stabilité d’un système électropneumatique constitué d’un axe linéaire commandé par deux servodistributeurs régulant le débit massique entrant dans chaque chambre de l’actionneur. La problématique générale est motivée par l’apparition d’un phénomène de redécollage sur ce système électropneumatique difficilement pris en compte par les études actuelles en automatique. Ce problème, rencontré depuis de nombreuses années, concerne toutes les commandes linéaires et non linéaires mono et multidimensionnelles étudiées au laboratoire. Il se traduit par des mouvements saccadés du vérin au voisinage de l’équilibre. Ce phénomène est dû à la présence de frottements secs et aux dynamiques des pressions dans les chambres pneumatiques de l’actionneur, qui continuent à évoluer (intégrer le débit massique entrant délivré par les servodistributeurs), même après l’équilibre mécanique. La première partie de ce mémoire propose une commande non linéaire commutée afin d’éviter le phénomène de redécollage de l’actionneur électropneumatique notamment vis-à-vis des variations de frottements secs qui peuvent à tout moment causer ce phénomène. Cette technique est finalement mise en œuvre et son efficacité est constatée. La plus grande partie de ce mémoire traite l’analyse de l’actionneur électropneumatique avec sa loi de commande commutée. La présence de frottements secs et l’application d’une loi de commande commutée nous a amené à concilier une démarche d’analyse de stabilité, en considérant une classe de systèmes commutés appelée systèmes affines par morceaux. La principale difficulté de cette démarche réside dans l’obtention de fonctions de Lyapunov adéquates, qui se transforme en un problème d’optimisation sous contraintes LMI (Linear Matrix Inequality) en utilisant la S-procédure. Afin d’analyser la stabilité d’un système PWA (PieceWise Affine), la première démarche proposée permet le calcul d’une fonction de Lyapunov quadratique par morceaux sous la forme d’un problème d’optimisation sous contraintes LMI, en imposant des conditions suffisantes de stabilité. Ces dernières permettent, contrairement aux méthodes classiques, d’assurer la convergence de trajectoires d’état non pas vers un point d’équilibre, mais vers un ensemble des points d’équilibre d’un système PWA. L’approche proposée permet aussi l’étude de la robustesse vis-à-vis des variations paramétriques dans le système. Nous proposons aussi une deuxième approche pour la construction d’un type de fonctions de Lyapunov dites polynomiales par morceaux, via l’utilisation des "sum of square" et de la "power transformation", afin d’analyser la stabilité d’un ensemble de points d’équilibre d’un système PWA, en présence de phénomènes de glissement et de variations paramétriques. Cette approche propose des conditions suffisantes moins conservatives que celles imposées par les fonctions de Lyapunov quadratique par morceaux. En effet, sur des exemples de systèmes PWA présentant de dynamiques discontinues sur les frontières entre les cellules, pouvant générer à tout moment des phénomènes de glissement, ces dernières s’avèrent inefficaces et ne permettent pas d’assurer la stabilité des systèmes PWA en présence de ces phénomènes. Par conséquent, les résultats sur la fonction de Lyapunov quadratique par morceaux sont étendus pour pouvoir calculer des fonctions de Lyapunov polynomiales par morceaux d’ordre supérieur, en résolvant un problème d’optimisation sous contraintes LMI. Ces dernières permettent de garantir des conditions plus générales et moins conservatives par rapport à celles développées dans la littérature. Ces deux approches ont été appliquées afin d’analyser la stabilité de l’ensemble des points d’équilibre du système électropneumatique, en considérant à la fois un modèle de frottements sous la forme d’une saturation et un autre sous la forme d’un relais présentant une dynamique discontinue. [...]
This work focuses on the control and stability analysis of an electro-pneumatic system, i.e. a linear pneumatic cylinder controlled by two servo valves regulating the mass flow entering each chamber of the actuator. The general problem is motivated by the appearance of stick-slip on the electro-pneumatic system, hardly taken into account by the current studies in automatic control. This problem, encountered throughout the years, concerns all mono- and multidimensional linear and non-linear controls systems studied at the laboratory. In pneumatic cylinders, the phenomenon consists in a displacement of the rod a while after it has come to a rest ; this is due to the fact that the force acting on the rod initially becomes smaller that the threshold which is necessary for a motion, and then this threshold is overcome later on. In this case, stick-slip is caused by the presence of dry friction and by the pressure dynamics in the chambers, which continue to evolve (integrating the net incoming mass flow from the servovalves) even after the rod has stopped. The first part of this thesis proposes a nonlinear switching control law in order to avoid stick-slip on pneumatic cylinder, taking into account with the variations of dry friction that may occur at any time causing this phenomenon. This technique is implemented and its effectiveness is recognized. The greatest part of this thesis deals with the stability analysis of the pneumatic cylinder with its switched control law. The presence of dry friction and the application of a switched control law requires an appropriate method for approaching the stability analysis ; this method is based on considering the closed-loop system as belonging to a class of switched systems called piecewise affine systems (PWA). The main difficulty in this approach lies in obtaining adequate Lyapunov functions for proving stability, which turns into an optimization problem under LMI constraints (Linear Matrix Inequality) using the S-procedure. In order to analyze the stability of a PWA system, a first method is proposed allowing the computation of a piecewise quadratic Lyapunov function through an optimization problem under LMI constraints. The methods takes into account, in contrast to conventional methods, that the states might converge not to a single point but to a set of equilibrium points. The proposed approach allows also the study of robustness with respect to parametric variations in the system. A second method is also proposed for the construction of a type of Lyapunov functions called piecewise polynomial, using the “sum of squares” and “power transformation” techniques. This approach proposes less conservative sufficient conditions than those imposed by the piecewise quadratic Lyapunov functions, yielding a more succesfull stability test when for PWA systems featuring sliding modes and parametric variations. In fact, on PWA systems with discontinuous dynamics (which can generate sliding phenomena), piecewise quadratic Lyapunov functions might prove ineffective to prove the stability. Therefore, the results on piecewise quadratic Lyapunov functions are extended in order to compute piecewise polynomial Lyapunov functions of higher order, by solving an optimization problem under LMI constraints. These functions are more general and allow less conservative conditions compared to those formerly developed in the literature. Both of these methods have been applied to the stability analysis of the set of equilibrium points of the pneumatic cylinder, considering first a friction model in saturation form and then a model in relay form with a discontinuous dynamics. The application of the methods is successful, i.e. the robust stability is proven under dry friction threshold variations, with possibility of sliding modes
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Zhao, Hao-Zhi, und 趙浩志. „Design of the Statically Balanced Mechanisms Using Pneumatic Cylinders“. Thesis, 2019. http://ndltd.ncl.edu.tw/handle/3wh8u4.

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碩士
國立臺灣科技大學
機械工程系
107
Whether it's industrial robotic arms, surgical robots or general industrial machinery, static balancing technology is often used to achieve better mechanical motion characteristics. Most of the static balancing methods commonly using spring, counterweight, magnetic, cable and connecting, and the above methods are passive static balancing methods. This thesis using active pneumatic method as the main source of gravity compensation, with its idea as the basis for a mechanical arm design, this design has the following advantages: (1) This pneumatic static balancing mechanism can achieve variable payload in one step; (2) This design can be stopped in any position during working and it has the locking function; (3) This thesis is more simplified in size compared with other static balancing methods; (4) Consider the weight of each part and use the actual spring to achieve an approximate gravity balanced; This thesis proposes a 2-DoF statically balanced mechanism using a linear pneumatic cylinder , and to verify its feasibility with MSC Adams CAE software. In order to make the 2-DoF statically balanced mechanism in line with practicability. This thesis considers the weight of each rod piece, a system formula is proposed to calculate the number of air pressure bars required according to different payload and different mounting positions and the size of the cylinder, to achieve the characteristics of the variable payload. Propose five operation steps and explain the function of the air pressure cylinder. Finally, the prototype measures the actual situation is the same as the simulation results, and verify the mechanism can achieve the above advantages.
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Al-Shaalan, Tareg Mutlag. „Utilizing expansion to reduce air consumption during the actuation of pneumatic cylinders“. 1992. http://catalog.hathitrust.org/api/volumes/oclc/31732343.html.

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Thesis (M.S.)--University of Wisconsin--Madison, 1992.
Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 148-152).
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Lan, Chou-Wei, und 藍冑偉. „Dynamic friction behaviors of the grease with nano-particles as additives in pneumatic cylinders“. Thesis, 2012. http://ndltd.ncl.edu.tw/handle/4a998z.

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博士
國立臺北科技大學
機電科技研究所
100
This study aims to build new friction force test equipment to measure and analyze the frictional force between seal and cylinder bore and dynamic friction characteristic of pneumatic cylinder with nano-lubricant. The dynamic characteristics of pneumatic cylinder are affected by guide seal, piston seal, grease and surface of cylinder bore. In seeking to improve the friction force characteristics of pneumatic cylinders and to clarify the friction phenomenon of the pneumatic cylinders, this study describes friction force measurement tests to measure the friction force of pneumatic cylinder, under both dry and lubricated conditions. Experimental equipments are designed to assess the effect of seals and lubrications in pneumatic cylinder, where the velocity and pressure of the driving cylinder are controlled. Measurements of friction force are shown for velocities of up to 200 mm/s. In this research, the first step, TiO2 and CuO nano-particles were chose to synthesize the nano-lubricants. Secord, a ball on flat test equipment was employed to measure the lubrication properties of Nano-lubricants. And the friction force measurement of pneumatic cylinder was used to measure the friction force of pneumatic cylinder with different seals in dry and lubricating condition. In these experiments, the best nano-lubricant and seal were chosen into analyze the friction characteristics of the grease with nano-particles as additives in pneumatic cylinder. The results appear that the friction force measurement system can effectively and precisely measure the friction force between seal and cylinder bore. And, in low velocity operate condition; the ball effect of the nano-particles can avoid the stick-slip motion of the piston. In the high velocity operate condition; the nano-particle can reduce the damp of the lubricant so that the friction force is not getting to increase. This study develops two equipments to measure and analyze the lubrication properties of the nano-lubricant and the dynamic characteristic of pneumatic cylinder with nano-lubricant. These equipments can help the researchers, engineers and designers to study any kind of lubricant and different setup of seals in the pneumatic cylinder.
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Dehghan, Behrad. „POSITION CONTROL OF A PNEUMATIC SYSTEM USING ADAPTIVE INTELLIGENT METHODS“. Thesis, 2012. http://hdl.handle.net/1974/7282.

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Behrad Dehghan: Position Control of a Pneumatic System using Adaptive Intelligent Methods. M.A.Sc. Thesis, Queen’s University, June, 2012. A large body of research is devoted to the development of advanced control techniques to improve the positioning performance of pneumatic systems, which are known to be highly nonlinear systems. Although model based controllers show good results, the requirement for a system model makes these methods difficult to implement. So-called intelligent algorithms, such as neural networks and fuzzy rule based controllers, are attractive since they do not require a model. The performance of these controllers can be enhanced by adding an adaptive mechanism to adjust controller parameters in a continuous on-line fashion. The objective of this thesis was to explore different adaptive intelligent controllers for position control of a pneumatic system. The application was the x-axis and z-axis of a pneumatic gantry robot. They were tested independently for their ability to track step and sine wave trajectories. The rodded x-axis cylinder was an example of a short stroke low friction application. The rodless z-axis cylinder was an example of a long stroke high friction application. Five different controllers were tested: 1) PID, 2) Fuzzy, 3) PID+Adaptive Neural Network Compensator (ANNC), 4) ANNonly and 5) Fuzzy Adaptive PID (FAPID). Results with FAPID and PID+ANNC showed improvement in tracking performance over PID by 60% for the rodded and 35% for the rodless cylinder. This level of improvement was expected given the adaptive nature of the controller. Unfortunately, both required significant effort to setup and tune. In order to reduce the tuning effort, a second adaptive mechanism was added to FAPID, to adjust output weights. Results with adaptive PID and modified FAPID (MFAPID) showed further improvement performance over PID by 87% for the rodded and 70% for the rodless cylinder (in addition to being easier to tune). To provide a measure of robustness, experiments were conducted at two supply pressures and three tracking frequencies. The fact that MFAPID was able to improve performance for both cylinders, is considered further evidence of its robustness. MFAPID is considered novel for two reasons: 1) fuzzy rule set is reduced in size relative previous work and 2) addition of an adaptive mechanism for output weights is new.
Thesis (Master, Mechanical and Materials Engineering) -- Queen's University, 2012-06-20 11:09:19.694
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Lee, Jing-Wen, und 李靜雯. „Developing Web RFID-based Concrete Test Cylinders Quality Management System“. Thesis, 2007. http://ndltd.ncl.edu.tw/handle/8pp5jd.

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碩士
國立臺北科技大學
土木與防災研究所
95
The concrete in construction projects is the most critical and requirement material which can affect the process of projects more easily, so that concrete test cylinder strength is a major inspection to confirm the concrete quality. Besides, the concrete test cylinder strength always works with labor and paper-based to record the test data. If the test-commissioned unit wants getting more about the test information documents, the unit must wait for the concrete test canter to find and check the record of testing-paper, but it is laborious, ineffective, and in need of more time. Therefore, developing a useful and automated quality management system to manage and maintain the test processes data is necessary. In an effort to improve concrete test cylinders management effectively, this thesis develops radio frequency identification (RFID) - concrete test cylinders quality management system (CTCQMS) which combines RFID and Web technologies. The system assists the concrete test center in enhancing not only communicating the real-time test information to the test-commissioned units but accumulating, maintaining, and managing the electronic documents.
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Bücher zum Thema "Quality of pneumatic cylinders"

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Clemmer, Jim. Firing on all cylinders: The service/quality system for high-powered corporate performance. Toronto: Macmillan of Canada, 1991.

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Clemmer, Jim. Firing on all cylinders: The service/quality system for high-powered corporate performance. 2. Aufl. Toronto, Ont: Macmillan, 1992.

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Clemmer, Jim. Firing on all cylinders: The service/quality system for high-powered corporate performance. Homewood, Ill: Business One Irwin, 1992.

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Barry, Sheehy, Hrsg. Firing on all cylinders: The service/quality system for high-powered corporate performance. Homewood, Ill: Business One Irwin, 1992.

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Clemmer, Jim. Firing on all cylinders: The service/quality system for high-powered corporate performance. Toronto: Macmillan of Canada, 1990.

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Clemmer, Jim. Firing on all cylinders: The quality management system for high-powered corporate performance. London: Piatkus, 1993.

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Clemmer, Jim. Firing on all cylinders [2nd ed.]: The service/quality system for high-powered corporate performance. 2. Aufl. Toronto: Macmillan Canada, 1992.

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Firing on All Cylinders. TCG Press, 1992.

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Firing on All Cylinders. MacMillan Publishing Company, 1991.

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Clemmer, Jim. Firing on All Cylinders. 2. Aufl. Macmillan of Canada, 1992.

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Buchteile zum Thema "Quality of pneumatic cylinders"

1

Bose, Prosenjit, und Pat Morin. „Testing the Quality of Manufactured Disks and Cylinders“. In Algorithms and Computation, 130–38. Berlin, Heidelberg: Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/3-540-49381-6_15.

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Kurita, Yuichi, Chetan Thakur und Swagata Das. „Assistive Soft Exoskeletons with Pneumatic Artificial Muscles“. In Haptic Interfaces for Accessibility, Health, and Enhanced Quality of Life, 217–42. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-34230-2_8.

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Morimoto, Takafumi, Mohd Aliff, Tetsuya Akagi und Shujiro Dohta. „Development of Flexible Haptic Robot Arm Using Flexible Pneumatic Cylinders with Backdrivability for Bilateral Control“. In Lecture Notes in Electrical Engineering, 231–37. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-17314-6_30.

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Patkó, István. „The Nozzle’s Impact on the Quality of Fabric on the Pneumatic Weaving Machine“. In Studies in Computational Intelligence, 583–92. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-03737-5_42.

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Kunitsyn, Maksym, und Anatoly Usov. „Development of Quality Criteria for the Surface Layer of Cylinders with Wear-Resistant Coatings“. In Lecture Notes in Mechanical Engineering, 137–47. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-40724-7_14.

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Rolinck, Maximilian, Sebastian Gellrich, Christoph Herrmann und Sebastian Thiede. „Data Analytics of Energy and Compressed Air Flows for Process and Quality Monitoring in Electro-Pneumatic Handling Systems“. In Sustainable Production, Life Cycle Engineering and Management, 109–16. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-44248-4_11.

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„Cylinders“. In Pneumatic Drives, 99–126. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-69471-7_8.

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„Pneumatic“. In In-Process Quality Control for Manufacturing, 121–23. CRC Press, 1989. http://dx.doi.org/10.1201/b15229-15.

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„Pneumatic Cylinders, Cushions, Motors, and Smart Actuators“. In Fluid Power Design Handbook, 483–517. CRC Press, 1995. http://dx.doi.org/10.1201/9781482295474-20.

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„Chapter 5 Equipment, construction, and quality control and assurance“. In The Pneumatic Flow Mixing Method, 173–216. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2016. http://dx.doi.org/10.1201/9781315375014-6.

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Konferenzberichte zum Thema "Quality of pneumatic cylinders"

1

Merkelbach, Stephan, und Hubertus Murrenhoff. „Exergy Based Analysis of Pneumatic Air Saving Measures“. In ASME/BATH 2015 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/fpmc2015-9513.

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Pneumatic linear drives are widely used in manufacturing, mainly for handling tasks. Pneumatic drives are very versatile and reliable. They are easy to install and to maintain as well as economically priced. Due to rising interest in environmental matters and increasing energy costs, energy efficiency has become a major issue in industrial applications. There is a growing competition between pneumatic and electromechanical drives. Pneumatic drives are said to have high operating costs while the purchase of electromechanical drives is more expensive. The operating costs of pneumatics are mainly induced by the energy consumption to provide pressurized air. Therefore many different air saving measures for simple handling tasks are proposed in literature, which offer opportunities for reducing the air consumption in comparison to standard configurations. This paper provides an overview of different approaches for saving air and typical applications for these approaches. The thermodynamic concept of exergy is utilized in the paper. It provides a better standard of comparison between different technologies than common energy analysis because exergy accounts for a system’s ability to conduct work out of different forms of energy. An exergy based analysis and a comparison of different air saving circuits are presented. The approaches described in literature are suitable for different applications. The study includes an analysis of cross flow valves to recuperate parts of the exhaust air during backstroke. Furthermore shut-off-valves using the expansion energy saved in the pressurized air of meter-out controlled cylinders are evaluated. The use of expansion energy is applicable if the entire cylinder force is not required at the end stop. The circuits are simulated based on lumped parameter models (DSHplus). The simulations are validated by experiments. The exergy efficiency of the examined circuits is compared to a meter-out controlled standard drive. Furthermore possible restrictions for the use of these circuits are discussed. This includes stability problems caused by the reduced force in the end stop or influences on the drive dynamics. If these restrictions are considered in the design of the facility, the same level of process quality and reliability compared to a standard setup can be achieved. Large energy savings and therefore reductions of operating costs of the pneumatic drives are possible with limited effort.
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Fry, Christian, James Mardula, Brandon Lee und Davide Piovesan. „Design of a Thumb Strength Testing Device“. In 2018 Design of Medical Devices Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/dmd2018-6952.

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The scope of the project was to design a pneumatic cylinder for measuring the resistive and applied force of the flexor pollicis longus (FPL) after anterior interosseous nerve (AIN) surgery. The patient’s distal section of the first phalange, of the thumb, is the area of evaluation. The device is intended for assessing both the quality of the surgery results as well as physical therapy progression. Criteria such as mobility, compact design, accuracy, repeatability, and ease of operation are some of the major requirements. The initial prototype is intended to collect FPL strength data to establish operating conditions.
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Wang, Jihong, und Tim Gordon. „Energy-efficient tracking control of pneumatic cylinders“. In 2011 50th IEEE Conference on Decision and Control and European Control Conference (CDC-ECC 2011). IEEE, 2011. http://dx.doi.org/10.1109/cdc.2011.6160684.

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Minamiyama, Yasuhiro, Takanori Kiyota, Takumi Sasaki und Noboru Sugimoto. „Application of Passive Dynamic Control to Pneumatic Cylinders“. In 2007 IEEE International Conference on Robotics and Automation. IEEE, 2007. http://dx.doi.org/10.1109/robot.2007.364172.

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Lakkonen, M., M. Linjama, K. T. Koskinen und M. Vilenius. „Applicability of Pneumatic Cylinders in Low-Pressure Water Hydraulics“. In International Off-Highway & Powerplant Congress & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2000. http://dx.doi.org/10.4271/2000-01-2612.

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Murayama, Eiji, Yukio Kawakami, Kazuhisa Ito, Akiyoshi Horikawa, Koji Shioda und Masashi Ogawa. „Development of new articulated manipulators with compact pneumatic cylinders“. In 2012 IEEE International Conference on Mechatronics and Automation (ICMA). IEEE, 2012. http://dx.doi.org/10.1109/icma.2012.6283239.

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Faudzi, Ahmad Athif Mohd, Koichi Suzumori und Shuichi Wakimoto. „Distributed Physical Human Machine Interaction Using Intelligent Pneumatic Cylinders“. In 2008 International Symposium on Micro-NanoMechatronics and Human Science (MHS). IEEE, 2008. http://dx.doi.org/10.1109/mhs.2008.4752458.

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Chen Juan, Ma Jungong und Wu Qiang. „Fault mechanism analysis and accelerate life testing for pneumatic cylinders“. In 2008 6th IEEE International Conference on Industrial Informatics (INDIN). IEEE, 2008. http://dx.doi.org/10.1109/indin.2008.4618376.

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Minamiyama, Yasuhiro, Takanori Kiyota, Takumi Sasaki und Noboru Sugimoto. „Follow-up control of pneumatic cylinders by passive dynamic control“. In 2008 IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM). IEEE, 2008. http://dx.doi.org/10.1109/aim.2008.4601698.

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Chen, Juan, Deyi Wang, Qiang Wu und Zhanlin Wang. „Multiple Stress Effect Analysis on Pneumatic Cylinders Accelerated Life Testing“. In 2009 Fourth International Conference on Innovative Computing, Information and Control (ICICIC 2009). IEEE, 2009. http://dx.doi.org/10.1109/icicic.2009.274.

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