Nonlinear dynamic analysis and control of a hydraulic press electro-hydraulic servo system

Nonlinear dynamic analysis and control of a hydraulic press electro-hydraulic servo system

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The internal electro-hydraulic servo system of a hydraulic press is affected by the non-linear friction, and it becomes non-linear, unstable under vibration.In this study, the dynamic behavior and control of such a system were investigated.A mathematical model was first built read more and then proportional-integral-derivative control and sliding mode control were applied.Particle swarm optimization was used to find the optimal gain values and proportional-integral-derivative control parameters to control and stabilize the system.Sliding mode control was used for interactive comparison to demonstrate that the controller could avert chaos and restore stable periodic motion.

A circuit was designed and assembled for the experimental confirmation of the results.The results showed that control of nonlinear behavior was better with sliding mode control than proportional-integral-derivative.This study can serve as a reference for the sensory play further investigation of hydraulic press electro-hydraulic servo systems.