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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 dura-tion,four hydraulic actuators are utilized. The model is then used to formulate an advanced feedfor-ward 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 per-formance of the system. Simulation results have demonstrated the effectiveness of the controller.
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 dura tion, four hydraulic actuators are utilized. The model is then used to formulate an advanced feedfor-ward 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 per-formance of the system. the controller.