Globally Active Feedback-Linearization Control Strategy for Pantograph-Catenary System

The research of the dynamic characteristics of the contact force in high speed pantograph-catenary system and its restraint is essential for the reliable operation of the high-speed train. In order to overcome the shortcoming of the existing active control strategies, this article introduces a globally linear active control strategy for the pantograph-catenary system of feedback-linearization, basing on the ternary pantograph-catenary dynamic modeling. The parameter cluster could be optimized through the zero-poles configuration in classic control theory, also, its effectiveness was validated compared with the LQR optimum control. The simulation result shows, during widely operation speed range, there exists more than 30% derating on the standard deviation under the contact force of pantograph-catenary system compared with that in present global linear active control strategy. Meanwhile, a better tracking result for expectation mean value of the contact force can be realized, therefore, the advantage of this strategy is verified.