Thematische Bibliographien / Rocker system

Inhaltsverzeichnis

  1. Zeitschriftenartikel
  2. Dissertationen
  3. Bücher
  4. Buchteile
  5. Konferenzberichte
  6. Berichte der Organisationen

Auswahl der wissenschaftlichen Literatur zum Thema „Rocker system“

Autor: Grafiati
Veröffentlicht am 28. Juni 2021
Zuletzt aktualisiert am 1. Februar 2022

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Zeitschriftenartikel zum Thema "Rocker system"

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Eremyants, V. E. „Dynamics of a rocker impactor system by elastic support of the rocker“. Journal of Machinery Manufacture and Reliability 40, Nr. 4 (August 2011): 326–30. http://dx.doi.org/10.3103/s1052618811040066.

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Zheng, Feng Zhu, Wei Min Cui und Hong Juan Li. „Static Strength Analysis of Components of Flap Control System for a Certain Type of Aircraft“. Applied Mechanics and Materials 401-403 (September 2013): 422–26. http://dx.doi.org/10.4028/www.scientific.net/amm.401-403.422.

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Pull rod and rocker arm are important parts of aircraft control system, its strength, stiffness and stability can largely affect the aircrafts control effect, sometimes the flight safety will be influenced [2]. A type of aircraft control system has been upgraded and modified, therefore the pull rod and rocker arm of the flap control system need to take the static strength test. Based on field test and finite element simulation analysis, this paper has the static strength of pull rod and rocker arm checked, and to verify the correctness of the finite element model and lay foundation for the optimization design of components of aircraft control system.
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Wang, Sunxin, und Yan Li. „Dynamic Rocker-Bogie: Kinematical Analysis in a High-Speed Traversal Stability Enhancement“. International Journal of Aerospace Engineering 2016 (2016): 1–8. http://dx.doi.org/10.1155/2016/5181097.

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The rocker-bogie suspension system has robust capabilities to deal with uneven terrain because of its distributing of the payload over its six wheels uniformly, while there is one major shortcoming to high-speed traversal over the planar terrain. This paper proposes a new dynamic rocker-bogie suspension system with two modes of operation: it can expand the span of the rocker-bogie support polygon to increase travel rate when the terrain is planar; and it can switch to its original configuration to move by low speed when it is faced with rough terrain. The analysis on dynamic stability margin and kinematical simulation on the two operating modes of rocker-bogie are employed to analyze and verify the rationality and effectiveness of the modification in the structure.
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Chen, Jia Chuan, und Jing Yu Liu. „A Photographing and Shooting Device Delivery System“. Advanced Materials Research 510 (April 2012): 507–11. http://dx.doi.org/10.4028/www.scientific.net/amr.510.507.

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Related to the technological field of Photographing and Shooting Support Device, a Photographing and Shooting Device Delivery System includes shooting track and its Device Case. A shooting track covers at least a set of track-flexible track units. Each single unit in the meantime owns two main tracks and at least two horizontal track axes which inset between the two main tracks. The horizontal track axis can meet the needs of the length-adjustment devices in stretching out and drawing back the length of axes. A single Shooting Track Device Case consists of a Roker, Case itself, two Pulley Mechanisms that attached to the bottom of the Case, as well as a position device that has the Rocker fixed. The Rocker can take apart and connect with the Case through Position Device. At least one axis moving mechanism is attached to the Pulley Mechanism Device, which can collapse the length in order to the change of axis. In doing so, it will not only cut down the expense but also save labor. By replacing the tripod spider in positioning through the Rocker, it can boost enormous convenience, make shooting in a low angle into a reality, and occupies relatively a smaller space compared with the tripod spider.
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Li, Yun Wang, Shi Rong Ge, Hua Zhu und Hai Feng Fang. „Mobile Platform of a Rocker-Type W-Shaped Track Robot“. Key Engineering Materials 419-420 (Oktober 2009): 609–12. http://dx.doi.org/10.4028/www.scientific.net/kem.419-420.609.

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Based on the configurations of the track type travel mechanism, instead of wheels, the tracks were introduced into the rocker-type robot mobile system, and various configurations of the rocker-type track suspensions were obtained. Through analyzing characteristics of the suspensions, a rocker-type unsymmetrical W-shaped track mobile system was presented. The rear main tracks of the W-shaped tracks were longer than the front ones. The prototype’s obstacles-surmounting capabilities including ditch-crossing, step and stairs-climbing were analyzed. The prototype could climb up a 320mm-high step, climb down a 520mm-high step, cross a 490mm-wide ditch. The capabilities analysis and prototype test results indicated that the rocker-type unsymmetrical W-shaped track mobile platform had excellent passive adaptability to rugged unstructured terrain environments and strong obstacles-surmounting capabilities.
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Chan, Chingyao, und Albert P. Pisano. „Dynamic Model of a Fluctuating Rocker-Arm Ratio Cam System“. Journal of Mechanisms, Transmissions, and Automation in Design 109, Nr. 3 (01.09.1987): 356–65. http://dx.doi.org/10.1115/1.3258803.

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This study is focused upon one example from a class of cam systems with a fluctuating rocker-arm ratio, known as “finger follower” cam systems. This class of cam systems is typically built in practice with a hydraulic tappet as the pivot-end support for the finger-follower, and the rocker-arm ratio varies as much as 34 percent from the baseline value during the cam cycle. A six-degree-of-freedom dynamic model is formulated to predict the forces as well as the motions of the cam system components. Successful dynamic modeling of such a system requires an accurate model for the hydraulic tappet as well as for the cam system, and so, six separate dynamic phenomena are identified in the tappet and the resulting nonlinear dynamics included in the cam system model. Lateral and rotational motions, as well as the customary longitudinal displacement, are admitted for the valve, and it is found that although the extra degrees of freedom change the cam contact force but little, they strongly influence where in the cam system toss and impact occur.
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Ghomian, Banafshe, Mojtaba Kamyab, Hassan Jafari, Mohammadebrahim Khamseh und Aoife Healy. „Rocker outsole shoe is not a threat to postural stability in patients with diabetic neuropathy“. Prosthetics and Orthotics International 40, Nr. 2 (24.07.2014): 224–30. http://dx.doi.org/10.1177/0309364614543549.

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Background: Rocker outsole shoes are commonly prescribed to patients with diabetic neuropathy to offload a particular area of the foot sole, thereby decreasing the risk of foot ulceration. Contrary to this, some evidence has reported a postural destabilising effect of these shoes in healthy adults. Objective: To explore the postural stability of patients with diabetic neuropathy who wear a rocker outsole shoe. Study design: Quasi-experimental. Method: In total, 17 patients with diabetic neuropathy (aged 49.29 ± 7.48 years; 7 female, 10 males) participated in this study. A Motor Control Test measuring centre of force displacement, response strength scale and response latency in medium and large perturbations was conducted using the EquiTest system to evaluate postural stability while wearing a baseline shoe (without a rocker outsole) or a rocker outsole shoe (with a toe-only rocker sole). Results: No significant difference was observed between the shoe conditions in centre of force displacement and response latency of the participants (p > 0.05). The results indicated a significant increase in the response strength scale of participants by the rocker outsole, for medium forward and backward and large forward perturbations ( p = 0.014, p = 0.001 and p = 0.027, respectively). Conclusion: When the immediate effect is a concern, the rocker outsole shoe did not negatively affect postural stability in patients with diabetic neuropathy. Clinical relevance This article will provide objective evidence about the effect of rocker outsole on postural balance in diabetic patients. In prescription of rocker outsole to prevent plantar ulceration of diabetic foot, immediate postural destabilising is not a concern.
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Tamgadge, Mayank. „Design and Fabrication of Rocker Bogie Mechanism“. International Journal for Research in Applied Science and Engineering Technology 9, Nr. VI (15.06.2021): 1033–37. http://dx.doi.org/10.22214/ijraset.2021.35043.

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The rocker-bogie suspension mechanism its currently NASAs one of the favourite design for wheeled mobile robots, mainly because it has multipurpose capabilities to deal with different types of surface and obstacles because it uniformly distributes the overall weight over its 6 wheels at all times. That's why it has many advantages when dealing with obstacles, there is one of the disadvantage is its low average speed of operation, the rocker bogie system generally not suitable for situations where high-speed operations for which to cover large surfaces Areas. mainly due to stability problems. Our purpose is to increase the stability of the rocker-bogie mechanism system by expanding its support design structure, making it more stable and flexible while moving at high speed, at different surfaces but keeping its original flexibility against obstacles. Most of the flexibility of this method can be achieved without any mechanical modification to existing designs only a change in control strategy. Some mechanical changes are required to Achieve the maximum Advantages and to increase the rover operations speed in future. We will develop a method of driving a rocker-bogie vehicle so that it can effectively step over most obstacles rather than impacting and climbing over them. The Rocker-Bogie Mechanism system was designed to be used at slow speeds. It is capable of overcoming obstacles that are depends upon the size of a wheel.
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Wang, Hui, Rong Rong Zhang, Sheng Liang Xiao und Peter Leisner. „Analysis of Kinematics and Dynamics of Crank-Rocker Mechanism“. Advanced Materials Research 945-949 (Juni 2014): 690–95. http://dx.doi.org/10.4028/www.scientific.net/amr.945-949.690.

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Graphic method and analytical method are often used for calculation analysis of kinematics and dynamics of the crank-rocker mechanism. However, the analysis procedure is usually complicated and the analysis results can not be expressed visually and directly. Programs are made on the basis of theoretical analysis of kinematics and dynamics in this paper, and a kind of analyzing system of crank-rocker mechanism is designed with Java. This system may analyze the crank-rocker mechanism’s motion state, stress condition and its change regulation in different operating conditions, as well as different rotation angles of the crank. This system has also a friendly man-machine interface. Calculation results are expressed through textbox and parametric curve. Each window of the system has the following buttons: calculation button, save button, output curve button, print button, maximum/minimum value output button and exit button. This system may evidently reduce the calculation workload and improve working efficiency.
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KOZAK, Władysław. „Crank and rocker piston assembly“. Combustion Engines 152, Nr. 1 (01.02.2013): 10–27. http://dx.doi.org/10.19206/ce-117009.

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The paper presents a qualitative analysis of a crank-and-rocker piston mechanism. In comparison to a conventional piston assembly the mechanism is composed of more elements necessary to convert the reciprocating motion of the pistons to rotary motion of the crankshaft. A greater complexity of the system is balanced by a greater number of advantages particularly visible in the module, composed of four cylinders coupled by the rocker with a single crank journal. A greater number of elements allow an obtainment of better functional flexibility of the mechanism, particularly in terms of the piston movement. This feature can be used to control the course of the engine torque, the heat losses to the cooling system, the reduction of the piston pressure on the cylinder liners (friction and mechanical losses) as well as variation of the compression ratio easily performed during engine operation. The natural characteristics of the four-cylinder module have been highlighted through an internal balancing of the mass forces. The analysis does not contain the elements of design. The design parameters in the analysis are random. They were selected to highlight the properties of the design and show negative and positive features. The relations and remarks included in the paper may turn out useful when designing the mechanism.
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Dissertationen zum Thema "Rocker system"

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St, Germain Brad David. „Technique for the optimization of the powerhead configuration and performance of liquid rocket engines“. Diss., Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/13063.

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Jansson, Albert, und Andreas Lezdins. „Student Rocket Experiment B2D2 - Power System“. Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-293893.

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The B2D2 student experiment aims to study theEarth magnetic field by releasing a free falling unit (FFU) from asounding rocket. The power system of the FFU needs to supply allsubsystems with sufficient power and energy during the flight.This is achieved with two lithium cells and voltage regulatorsthat produce the required voltages and can deliver the necessarycurrent. The voltage regulators are tested on prototype PCBsand their performance evaluated. An attitude determination andcontrol system is needed to stabilise the FFU after release. Motordrive systems are custom designed for this purpose. The powerconsumption of the FFU is computer-simulated based on mea-surements on existing hardware. According to tests conducted,switching regulator designs with inductors are the best candidatesfor the power system. The chosen designs have sufficient marginsin current capacity to power the experiment during the durationof the mission with the chosen battery cells.
Målet med studentexperimentet B2D2 är att studera det jordmagnetiska fältet genom att släppa en experimentmodul från en sondraket. Strömförsörjningssystemet i experimentmodulen behöver kunna leverera tillräcklig strömstyrka och energi till alla delsystem under experimentets varaktighet. Detta åstadkoms med två litiumceller och spänningsomvandlare som producerar de spänningar som behövs vid den strömstyrka som krävs. Spänningsomvandlarna testas på prototypkort för att utvärdera deras prestanda. Ett attitydkontrollsystem behövs för att stabilisera experimentenheten efter dess att den släppts. Till detta attitydkontrollsystem utvecklas ett motordrivsystem. Strömförbrukningen av experimentenheten simulerades utifrån mätningar på existerande hårdvara. Utifrån utförda tester bedöms de induktorbaserade switchande spänningsomvandlarna vara de lämpligaste. De valda kretsdesignerna har tillräcklig strömkapacitetsmarginal för att kunna strömförsörja experimentenheten under experimentets varaktighet med de valda battericellerna.
Kandidatexjobb i elektroteknik 2020, KTH, Stockholm
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Mockensturm, Jeffrey J. „Modernization of the Multiple Launch Rocket System embedded system software“. Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1995. http://handle.dtic.mil/100.2/ADA295248.

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Bidgol, Saman, und Viktor Granberg. „Power supply system for the ISAAC rocket experiment“. Thesis, KTH, Skolan för elektro- och systemteknik (EES), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-199333.

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Kitchen, Seth, und Daniel Klinger. „TELEMETRY SYSTEM FOR INTERCOLLEGIATE ROCKET ENGINEERING COMPETITION VEHICLE“. International Foundation for Telemetering, 2017. http://hdl.handle.net/10150/626955.

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This paper describes a telemetry system for a high-powered rocket entered in the Intercollegiate Rocket Engineering Competition hosted by the Experimental Sounding Rocket Association. On-board the rocket GPS coordinates,acceleration, magnetic field and lux readings are collected,along with other data. The data is sent between internal systems using commercial Internet-of-Things boards that utilize IEEE 802.11 wireless protocols. The aggregated data is transmitted to a ground station through a monopole transmitting antenna and custom designed helical receiving antenna such that in the event of a crash, data is not lost. The ground station data recovery is performed using a commercial XBee transceiver, before being displayed in real time for tracking and safety purposes,and stored for future data analysis. The target apogee is 9 km, so real time GPS data will be useful for both tracking and vehicle recovery operations.
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Patterson, William Ray. „DEVELOPMENT OF A ROCKET MOTOR TEST SYSTEM AND A STUDY OF HYBRID ROCKET FUEL GRAINS“. MSSTATE, 2009. http://sun.library.msstate.edu/ETD-db/theses/available/etd-07062009-120546/.

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A rocket test system was developed and fabricated for the purpose of testing hybrid rocket motors. The test system includes a rocket test stand, load cell, and data acquisition system that is capable of safely and accurately recording thrust data from each burn. This paper documents the test system design and operation. The test system has been used to study the performance results from using multiple types of fuel utilized in hybrid motor systems. The types of hybrid motors used typically have thrust values below 1000 lbf. Along with different fuels, different motor configurations were also used during testing to determine if each hybrid rocket fuel reacted similarly under altering conditions.
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Rock, Brevin Shae. „Two-patch predator-prey system coupled with migration of both species“. View electronic thesis (PDF), 2009. http://dl.uncw.edu/etd/2009-3/Rockb/brevinrock.pdf.

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Holmeros, Linus. „Data acquisition system for rocket engine hot fire testing“. Thesis, KTH, Maskinkonstruktion (Inst.), 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-99495.

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ECAPS har utvecklat ett unikt drivmedel med tillhörande raketmotor för satellitstyrning som skall kunna ersätta Hydrazin, vilket idag är det vanligaste bränsle ombord på satelliter. Hydrazin är extremt giftigt och cancerogent. Det nya drivmedlet har 6 % högre specifik impuls samt 30 % högre densitetsimpuls jämfört med Hydrazin. Dessutom utgör ECAPS drivmedel en betydligt mindre risk för människa och miljö. Denna rapport innefattar en litteraturstudie om raketmotorer som används på satteliter samt hur testmiljön är uppbyggd av ECAPS där de utvecklar egna motorer. En motor beskrivs först generellt från bränsletank till dysutlopp och kompletteras med teoretiska härledningar av användbara begrepp. För vidareutveckling av nya raketmotorer har det befintliga motortestsystemet för få mätkanaler och begränsad samplingshastighet (2 kHz). Vidare är operatörsinterface och mjukvaran i behov av uppgradering samt att antalet kanaler behöver bli fler .Rapporten behandlar implementeringen av ett nytt mätsystem som är skrivet i Labview 8.6 vilket har gett en förbättring av t.ex. prestanda, stabilitet och gränssnitt. Samplingsfrekvensen är nu 10 kHz på 24 kanaler med marginal för utbyggnad upp till 40 kanaler, larmfunktioner finns på temperaturgivare och valfria analoga givare, gränssnittet är logiskt och mer ergonomiskt samt att spårbarheten för alla typer av körningar sparas i unika loggar.
ECAPS has developed a unique propellant with a rocket engine which can be used to control satellites and replace Hydrazin which today is the most common fuel onboard on satellites. Hydrazin is extremely toxic and cancerogenic. The new propellant offers 6 % better specific impulse and 30 % better density impulse compared to hydrazine. ECPAS´s propellant also provides significant lower risks for both man and environment. The report includes a literature study about rocket engines which can be used on satellites and how the test environment is arranged where ECAPS develops their engines. The rocket engine is first generally described and then complemented a theoretical derivation of common concepts. For further development of new rocket engines the present engine test system has too few sensor channels and limited sampling capability (2 kHz). The operator interface and software can be upgraded and the number of channels needs to increase. This report treats the implementation of a new test system which is written in Labview 8.6 and has improved for example performance, stability and interface. The sampling frequency is now 10 kHz on 24 channels with a margin for up to 40 channels, alarm functions exists on both temperature and multiple choice sensors, the user interface is logic and more ergonomic together with increased traceability for different types of tests which are saved in unique logs.
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Chammam, Oussama. „Localization system and remote cutter for sounding rocket experiment“. Thesis, KTH, Skolan för elektro- och systemteknik (EES), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-199275.

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Miquel, Valentin. „Propellant Feeding System of a Liquid Rocket With Multiple Engines“. Thesis, KTH, Rymdteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-276460.

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Multiengine first stages are the new trend in recent rockets. Reusability and an oxygen/methane based engine complete this picture. ArianeGroup wants to develop its own rocket following these principles. This thesis presents the study of the feeding system for a seven Prometheus engine rocket. Several ways of connecting propellant tanks to engines were proposed and analyzed. Two configurations were selected and studied with more detail. One consists of a main feeding line which is then split in seven secondary lines. The other one adds one rank of pipes to reduce the number of feeding valves. Their performances were assessed according to classic space industry drivers. Furthermore, the impact of the two solutions on the efficiency of the tank was evaluated. CAD drawings and simulation models were made and could be a base for future work if one of the systems is chosen. The study shows that a falcon 9 like feeding system is performant in terms of mass and pressure losses but another cost-effective configuration is possible and gives good results.
Första stegen med flera motorer är den nya trenden i de senaste raketerna. Återanvändbart och en syre och metan-baserad motor kompletterar denna bild. ArianeGroup vill utveckla sin egen raket enligt dessa principer. Denna avhandling presenterar studien av drivmedelsrör för en sju Prometheus-motorraket. Flera sätt att ansluta drivmedelstankar till motorer föreslogs och analyserades. Två konfigurationer valdes ut och studerades mer detaljerat. En består av en huvudlinje som sedan delas upp i sju sekundära linjer som på SpaceX Falcon 9. Den andra lösningen lägger till en rang av rör för att minska antalet ventiler. Deras prestanda utvärderades först enligt klassiska kriterier för rymdindustrin. Dessutom utvärderades de två lösningarnas påverkan på tankens effektivitet. CAD-ritningar och simuleringsmodeller gjordes och kan vara en bas för framtida arbeten om ett av systemen väljs. Studien visar att ett Falcon 9-liknande konfiguration har bättre prestanda när det gäller massa och tryckförluster men en annan kostnadseffektiv konfiguration är möjlig och ger goda resultat.
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Bücher zum Thema "Rocker system"

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Nemeth, Edward J. Health management system for rocket engines. [Washington, DC]: National Aeronautics and Space Administration, 1990.

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O'Malley, T. J. Artillery: Guns and rocket systems. London: Greenhill Books, 1994.

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Perry, John G. Reusable rocket engine turbopump health management system. Canoga Park, Calif: Rockwell International, Rocketdyne Division, 1989.

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Perry, John G. Reusable rocket engine turbopump health management system. Canoga Park, Calif: Rockwell International, Rocketdyne Division, 1989.

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Gupta, S. C. Growing rocket systems and the team. Bangalore: Prism Books, 2006.

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Grubb, Teryl G. A portable rocket-net system for capturing wildlife. [Fort Collins, Colo.]: USDA Forest Service, Rocky Mountain Forest and Range Experiment Station, 1988.

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Grubb, Teryl G. A portable rocket-net system for capturing wildlife. [Fort Collins, Colo.]: USDA Forest Service, Rocky Mountain Forest and Range Experiment Station, 1988.

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Turbopumps for liquid rocket engines. [Warrendale, PA: Society of Automotive Engineers, 1992.

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Shevi͡akov, A. A. Sistemy upravlenii͡a raketnykh dvigateleĭ i ėnergeticheskikh ustanovok. Sistemy upravlenii͡a ėnergeticheskikh ustanovok. Moskva: "Mashinostroenie", 1985.

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Noordung, Hermann. The problem of traveling in outer space: The rocket motor. Washington, D.C: National Aeronautics and Space Administration, 1993.

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Buchteile zum Thema "Rocker system"

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Suresh, Aswath, Nitin Ajithkumar, Sreekuttan T. Kalathil, Abin Simon, V. J. Unnikrishnan, Deepu P. Mathew, Praveen Basil et al. „An Advanced Spider-Like Rocker-Bogie Suspension System for Mars Exploration Rovers“. In Advances in Intelligent Systems and Computing, 423–47. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-31293-4_34.

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Huntress, Wesley T., und Mikhail Ya Marov. „Rockets“. In Soviet Robots in the Solar System, 31–47. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-7898-1_4.

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Mishra, D. P. „Liquid-Propellant Injection System“. In Fundamentals of Rocket Propulsion, 333–95. Boca Raton: CRC Press, 2017.: CRC Press, 2017. http://dx.doi.org/10.1201/9781315175997-10.

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Palaszewski, Bryan A., Michael L. Meyer, Les Johnson, Dan M. Goebel, Harold White und David J. Coote. „In-Space Chemical Propulsion System Roadmap“. In Chemical Rocket Propulsion, 655–71. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-27748-6_26.

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Kinnersley, M., P. Freeborn und K. Schefold. „The Rockot Launch System“. In The Space Transportation Market: Evolution or Revolution?, 81–92. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-010-0894-5_11.

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Milone, Eugene F., und William J. F. Wilson. „Rocks and Minerals“. In Solar System Astrophysics, 169–96. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-8848-4_7.

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Kitsche, Wolfgang. „Bench Systems“. In Operation of a Cryogenic Rocket Engine, 39–61. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-10565-4_5.

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Figueroa, Fernando, und John Schmalzel. „Rocket Testing and Integrated System Health Management“. In Springer Series in Advanced Manufacturing, 373–91. London: Springer London, 2006. http://dx.doi.org/10.1007/1-84628-269-1_15.

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Krawczyk, M., B. Bartkowiak und J. Wierciak. „Valve for Testing Rocket Engines“. In Advances in Intelligent Systems and Computing, 87–94. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-65960-2_12.

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Fiedler, Torben, Joachim Rösler, Martin Bäker, Felix Hötte, Christoph von Sethe, Dennis Daub, Matthias Haupt, Oskar J. Haidn, Burkard Esser und Ali Gülhan. „Mechanical Integrity of Thermal Barrier Coatings: Coating Development and Micromechanics“. In Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 295–307. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-53847-7_19.

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Abstract To protect the copper liners of liquid-fuel rocket combustion chambers, a thermal barrier coating can be applied. Previously, a new metallic coating system was developed, consisting of a NiCuCrAl bond-coat and a Rene 80 top-coat, applied with high velocity oxyfuel spray (HVOF). The coatings are tested in laser cycling experiments to develop a detailed failure model, and critical loads for coating failure were defined. In this work, a coating system is designed for a generic engine to demonstrate the benefits of TBCs in rocket engines, and the mechanical loads and possible coating failure are analysed. Finally, the coatings are tested in a hypersonic wind tunnel with surface temperatures of 1350 K and above, where no coating failure was observed. Furthermore, cyclic experiments with a subscale combustion chamber were carried out. With a diffusion heat treatment, no large-scale coating delamination was observed, but the coating cracked vertically due to large cooling-induced stresses. These cracks are inevitable in rocket engines due to the very large thermal-strain differences between hot coating and cooled substrate. It is supposed that the cracks can be tolerated in rocket-engine application.
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Konferenzberichte zum Thema "Rocker system"

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Georgescu, Adrian, P. A. Simionescu und Ilie Tălpăşanu. „Design and Prototyping of a Cost-Effective Sun Tracking System for Photovoltaic Panels“. In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-37682.

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The paper discusses the design and prototype build of a sun tracking system for photovoltaic panels, that consists of a slider-rocker mechanism and a controls system. The slider-rocker is optimized for best transmission angle properties, near linear input-output function and 180 degrees rocker travel. The control system includes three shaded light-dependent resistors pointing in different directions, and operational amplifiers to sense the imbalance in their illumination. The amplified imbalanced signal is used to control the linear motor of the slider-rocker mechanism towards minimizing this imbalance. A small scale prototype of the system has been built and tested successfully.
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Li, Shutian, Guoping Wang, Yunfei Miao und Xiaoting Rui. „Dynamic Analysis of Multiple Launch Rocket System Under the Action of Jet Flow“. 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/detc2019-98493.

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Abstract Jet flow is one of the important factors affecting the vibration, initial disturbance and firing dispersion of Multiple Launch Rocket System (MLRS). In this research, based on the rocket gas jet dynamics, MLRS launch dynamics theory and transfer matrix method for multibody system, a physical model of jet flow model and a MLRS launch dynamics model considering the multiple launch rocket device and the launch of rocket are built. The launching dynamic process of rocket jet flow of MLRS is numerical simulated by using the technology of overset mesh and the Computational Fluid Dynamics (CFD) methods. The nephogram of mach number and contour map of velocity are obtained. The impact effect force on the air-facing surface of rocker launcher after the rocket slides and leaves the directional barrel is acquired. Regarding the calculated data of impact force to MLRS as external force, the MLRS launch dynamics equation is solved by using the transfer matrix method for multibody system. Finally, the dynamics response of MLRS under the effect of jet flow is analyzed.
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Shilpiekandula, Vijay, und Yun Seong Song. „A Music-Based Mechatronic System for Teaching Modeling and Control“. In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-66817.

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Audio-based tools can enhance the learning experience in introductory modeling and control classes at the undergraduate (sophomore) level in the mechanical engineering curriculum. An example audio-based learning tool that we propose is the “FlexSynth,” a servo-actuated flexural rocker arm that sways to an electronically generated music. We have built and tested the FlexSynth as part of a project under the MIT advanced graduate subject 2.737 Mechatronics class offered in Fall 2007. The angular range of the rocking motion of the flexural arm in the FlexSynth is mapped to a set of musical notes. While the flexural rocker swayed to the generated ‘command’ music, its motion is also converted into an equivalent ‘response’ music. Two speakers are used, one to play the commanded music and the other to play the response music. The performance of control algorithms (such as proportional or proportional-integral control) can be discerned from the command and response music, and compared for better musical quality. The appeal of an electromechanical system, driven by music and controlled to see the ‘dancing’ flexural rocker, makes the overall system an interesting show-and-tell for young kids or the public at large, getting them excited about science and engineering automation. Advanced control issues such as filtering of flexural damping modes of the rocker can also be addressed with this system implementation. Advanced students in the controls area can study the design tradeoffs between robustness and speed in following the command music. While the usual debugging tools such as multimeters, oscilloscopes, and dynamic signal analyzers allow for hands-on learning about the performance of a control system, an audio-based unit such as the FlexSynth can be a valuable addition to the innovative teaching tool kit.
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Zhang, Jingshui, Yuejin Zhao, Weiwen Zhu, Hong Wu, Liangliang Zhang, Liquan Dong und Cunlin Zhang. „A passive THz imaging system based on the crank-rocker mechanism“. In 2013 38th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2013). IEEE, 2013. http://dx.doi.org/10.1109/irmmw-thz.2013.6665886.

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Tang, Yinghong, Zhongwei Liu und Bing He. „Optimization Design for Crank-rocker Mechanism Based on Genetic Algorithm“. In 2012 Second International Conference on Intelligent System Design and Engineering Application (ISDEA). IEEE, 2012. http://dx.doi.org/10.1109/isdea.2012.493.

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Moubarak, Paul M., Pinhas Ben-Tzvi, Zhou Ma und Eric J. Alvarez. „Kinematic Synthesis and Dynamic Analysis of the Dual-Rod Slider Rocker Mechanism: An Application to Modular Robotics“. 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/detc2012-71200.

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In mechanism theory and design, no work has been reported on the kinematic synthesis and dynamic analysis of the dual-rod slider rocker mechanism. By definition, this system is equivalent to two traditional slider-rocker mechanisms that share a common rocker, where the two sliders translate along two opposite directions of motion. Unlike a single slider-rocker mechanism, the dual-rod-based mechanism exhibits unique kinematic characteristics in which the two sliders do not travel the same distance for the same rocker rotation. This paper presents an optimal analysis that outlines the early investigations on the kinematic design and dynamic analysis of the dual-rod slider rocker mechanism. Because of the translation difference that exists between the two sliders, an expression for the relative position error is derived. This error is integrated as a cost function in an optimization problem which calculates the optimal rod length that allows the two sliders to meet terminal boundary conditions. These kinematics are validated experimentally through a case-study application in modular robotic docking.
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Benner, Mark M., und Arthur G. Erdman. „Tolerance Synthesis Method for an Industrial Crank-Rocker Application“. In ASME 1992 Design Technical Conferences. American Society of Mechanical Engineers, 1992. http://dx.doi.org/10.1115/detc1992-0330.

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Abstract An emphasis on reducing product development lead-times in the automotive industry has received much attention recently. The synthesis and design of windshield wiper drive mechanisms is no exception. This paper examines and develops the new concept of performance synthesis for crank-rocker linkages with two prescribed positions as applied to windshield wiper systems. Various performance criteria are evaluated with respect to the effect on the desired motion of the crank-rocker linkage by manufacturing tolerances, elastic deflections and joint clearances. Three performance criteria are mapped in the crank-rocker synthesis solution space to aid in the selection of solutions when considering the performance demands of the windshield wiper system. A case study is presented to demonstrate the effectiveness of the new performance synthesis concept which simultaneously considers position tolerance sensitivity, transmission angles and angular acceleration magnitudes in the synthesis process.
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Mori, Yuki, Keigo Watanabe und Isaku Nagai. „Development of an omnidirectional mobile platform with a rocker-bogie suspension system“. In IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society. IEEE, 2016. http://dx.doi.org/10.1109/iecon.2016.7793808.

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Miller, David P., und Tze-Liang Lee. „High-Speed Traversal of Rough Terrain Using a Rocker-Bogie Mobility System“. In Eighth International Conference on Engineering, Construction, Operation, and Business In Space; Fifth International Conference and Exposition and Demonstration on Robotics for Challenging Situations and Environments. Reston, VA: American Society of Civil Engineers, 2002. http://dx.doi.org/10.1061/40625(203)54.

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Liu, Xiaoming, und Zhi-Kui Ling. „Contact Force Analysis in an OHC Finger-Follower-Type Cam-Valve System With Different Dynamic Models“. In ASME 1998 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/detc98/mech-5850.

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Abstract This study uses various dynamic models to predict contact forces in a finger-follower-type cam-valve system. It is found that the following factors have the greatest impact on the overall behavior of a cam valve system. They are the cam profile, valve spring, and rocker arm ratio. In this study, different techniques in modeling cam profiles are explored. Various ways of modeling valve-springs are examined. The rocker-arm ratio is assumed to be either a nonlinear function or a constant. Since the speed of the cam dictates a great deal in the overall behavior of the system, three different cam speeds are tested in this study. The models used in this study are established with a constructive approach by using a commercially available software system.
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Berichte der Organisationen zum Thema "Rocker system"

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Mills, James. Guided Multiple Launch Rocket System/Guided Multiple Launch Rocket System Alternative Warhead (GMLRS/GMLRS AW). Fort Belvoir, VA: Defense Technical Information Center, Dezember 2015. http://dx.doi.org/10.21236/ad1019443.

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Lawrence, Timothy J. Nuclear Thermal Rocket Propulsion Systems. Fort Belvoir, VA: Defense Technical Information Center, März 2005. http://dx.doi.org/10.21236/ada430931.

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Roth, J. T. Training in Multiple Launch Rocket System Units. Fort Belvoir, VA: Defense Technical Information Center, April 1992. http://dx.doi.org/10.21236/ada250140.

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Burns, Terry L., und Thomas R. Dickinson. Multiple Launch Rocket System: An Ammunition Resupply Challenge. Fort Belvoir, VA: Defense Technical Information Center, April 1988. http://dx.doi.org/10.21236/ada202203.

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Turner, David J. 'MLRS': A Rocket System for the Marine Corps. Fort Belvoir, VA: Defense Technical Information Center, März 1990. http://dx.doi.org/10.21236/ada223182.

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Mossman, Jason B., und David R. Perkins. Rocket Propulsion Technology Impact on TSTO Launch System Cost. Fort Belvoir, VA: Defense Technical Information Center, Mai 2001. http://dx.doi.org/10.21236/ada411282.

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Saul, W., und Mark C. Grubelich. Rocket Engine Test System for Development of Novel Propulsion Technologies. Office of Scientific and Technical Information (OSTI), September 2016. http://dx.doi.org/10.2172/1562423.

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Hills, Robert S. Design Sounding Rocket Payload System to Study Vehicle Charging Phenomena. Fort Belvoir, VA: Defense Technical Information Center, Mai 1985. http://dx.doi.org/10.21236/ada162149.

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Hernandez, Charles L. Human Factors Evaluation of the High Mobility Artillery Rocket System (HIMARS) in the Combined HIMARS-Guided Multiple Launch Rocket System (GMLRS) Initial Operational Test. Fort Belvoir, VA: Defense Technical Information Center, Mai 2007. http://dx.doi.org/10.21236/ada468506.

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Hernandez, Charles L. Human Factors Evaluation of the XM30 Guided Multiple Launch Rocket System (GMLRS) in the Combined High Mobility Artillery Rocket System (HIMARS)-GMLRS Initial Operational Test. Fort Belvoir, VA: Defense Technical Information Center, Mai 2007. http://dx.doi.org/10.21236/ada468402.

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