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Design of Electrohydraulic Force Loading System
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English
Abstract
This paper discusses the design of an electrohydraulic force loading system. This system is able to produce any desired arbitrary forces. As an example, the loading system is designed to load force to a hydraulic position servo. It is shown that if the loading system is designed by using a combination of a servo valve with critical center and a hydraulic cylinder to realize a force feedback close-loop system, the position system may generate a large additional force to frustrate this loading system to work properly. By using a bypass adjustable throttle valve across the two flow lines of the loading cylinder, it is verified by theoretic analysis and simulation that the additional force generated by position system can be greatly reduced. Because an asymmetric cylinder is used as the loading actuator, modelling of its characteristics is also carried out.
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Citation
LeQuoc, S., Xiong, Y., Cheng, R., and Zhang, H., "Design of Electrohydraulic Force Loading System," SAE Technical Paper 941798, 1994, https://doi.org/10.4271/941798.Also In
References
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- Le Quoc S. Xiong Y.F. Cheng R.H.M. “ Identification and control of nonlinear hydraulic systems ,” SAE Transactions -- Journal of Commercial Vehicles 101 281 285 1992
- Watton Joho “ Closed-loop design of an electrohydraulic motor drive open-loop steady-state characteristics ,” The Journal Of Fluid Control 20 1 1989
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