Fault-tolerant control for high-speed trains based on neural network embedded compensation control

Abstract

To address the position and velocity tracking control problems of high-speed trains (HSTs), a neural network embedded fault-tolerant control (FTC) method is proposed in this paper. The unknown resistances and interactive forces between the connected carriages are taken into account. The stability of the neural networks (NNs) embedded FTC is proved by a common formal derivative of Lyapunov function, in which an NN-embedded item is integrated with a base controller which is stable for the system. On account of the system uncertainties and actuator faults, a value adaptive sliding mode control for estimating equivalent term composed of the unknown nonlinear terms and the disturbance is used and the base FTC is designed based on this method. The results of simulations show that the method of NN embedded optimization technology proposed in this paper can compensate and optimize the performance of the base FTC with only a few conditions. In the absence of actuator faults, NN-embedded FTC proposed in this paper reduces position error by about $ 5\% $ $5\mathrm{\%}$ and velocity error by $ 94\% $ $94\mathrm{\%}$ . In case of actuator faults, it reduces position error by about $ 3\% $ $3\mathrm{\%}$ and velocity error by $ 71\% $ $71\mathrm{\%}$ .