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CHU Deying
ZHANG Zhiyi
WANG Gongxian
HUA Hongxing
State Key Laboratory of Vibration,
Shock and Noise,
Shanghai Jiaotong University,
Shanghai 200240, China
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NUMERICAL MODELING OF MULTI-
CYLINDER ELECTRO-HYDRAULIC SYSTEM AND CONTROLLER DESIGN FOR
SHOCK TEST MACHINE
Abstract:
A high fidelity dynamic model of a high-energy hydraulically-actuated shock test machine for heavy weight devices is presented to satisfy the newly-built shock resistance standard and simulate the actual underwater explosion environments in laboratory as well as increase the testing capability of shock test machine. In order to produce the required negative shock pulse in the given time duration, four hydraulic actuators are utilized. The model is then used to formulate an advanced feedforward
controller for the system to produce the required negative
waveform and to address the motion synchronization of the four
cylinders. The model provides a safe and easily controllable way
to per-form a “virtual testing” before starting potentially
destructive tests on specimen and to predict performance of the system. Simulation results have demonstrated the effectiveness of the controller.
Key words:
Shock test machine Negative shock pulse Actuator redundancy
Feedforward controller Virtual testing
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