Study of Electro-Hydraulic Force Control System Controlled by Flow Press Servo-Valve and Nonlinear Performance Analysis

Abstract:

The mathematic model of the flow press sever-valve was built in this paper, during the process of building the model, the author took into account the load moment brought by the pair of spray nozzles flow force and the load moment brought by the force couples back pole and the fundamental equation of the force moment motor. On the other hand, the author analyzed the influence of the nonlinear factor to system performance, and the nonlinear factor was valve port overlap length disaccord caused by machining error. The mathematic model of the electro-hydraulic force control system controlled by the flow press servo-valve with valve port error was built. The results of simulation and experiment showed that valve port error badly influenced the system performance, and that valve port error was the main reason of the pressure higher than the supply pressure, which is one of the two cylinder cavities. The simulation curve and the experiment curve were accord compared by system simulation and experiment results, so we can know that the mathematic model of the flow press sever-valve and of the electro-hydraulic force control system controlled by the flow press servo-valve is correct.

• Periodical: Advanced Materials Research (Volumes 154-155)
• Pages: 137-142
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.154-155.137
• Online since: October 2010
• Authors: Jun Peng Shao, Jian Ying Li, Zhong Wen Wang, Gui Hua Han
• Keywords: Electro-Hydraulic Force Control System, Experiment Study, Flow Press Servo Valve, Mathematical Models, Nonlinear Performance, System Simulation

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