A research of discrete variable structure control algorithm for electro mechanical servo system

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To control the electromechanical servosystem precisely, based on the nonlinear mathematical model, the discrete variable structure control algorithm is designed using delay characteristic. The proposed algorithm eliminates chattering effectively by improve on the reaching law, applying delay characteristic to estimate the uncertainty, the ability of overcome nonlinear and robustness is improved. The simulation results shows that the controller designed by the proposed algorithm can track the reference signal fast and precisely under the condition of parameters' perturbation and disturbance.