关键词: 电动加载, CMAC控制策略, 稳定性

Abstract:

The disturbance of surplus torque and the nonlinearity deteriorate the precision of torque tracking in the electric loading system.This undesired effect cannot be removed satisfactorily by the conventional control.To deal with this problem,after analyzing the origin of instability of the traditional CMAC,we propose a novel CMAC composite control strategy based on optional weight and investigate its structure and algorithm.This control adopts the desired output and the actual output of the electric loading system as the incentive signals of CMAC,and treats the error between the desired output and the actual output as the training signal for the CMAC structure.A non-uniform quantization scheme is then proposed according to the characteristics of the incentive signals.In the conventional CMAC,errors are equally distributed into memory cells;while the novel CMAC allocates errors according to the Gaussian weighting coefficients.Simulation results show that the proposed hybrid controller effectively suppresses the disturbance of surplus torque and the nonlinearity such as friction,improves the control precision of the electric loading system and enhances the control stability of the system.

Key words: eric load;CMAC control strategy;stability