电磁直线执行器控制参数多目标优化设计

Multi-objective Optimization Design of Control Parameters for Electromagnetic Linear Actuator

针对电磁直线执行器控制性能要求高、控制参数设计周期长等问题,提出一种控制参数多目标优化设计方法。基于电磁直线执行器系统,设计了鲁棒控制器,选择控制器参数作为优化变量,以系统ITAE准则、正弦信号跟踪下的相移量、阶跃信号下的超调量作为优化目标,采用多目标粒子群优化算法(MOPSO)对控制参数进行优化,求解Pareto前沿,最后结合控制参数与控制系统性能的相关系数矩阵选择最终控制参数最优解。结果表明:控制参数优化后控制性能指标与优化前相比,电磁直线执行器控制系统中ITAE准则JITAE下降了约79.9%;阶跃信号下超调量σ下降了约95.2%;正弦跟踪下相移量S下降了约79.7%,验证了优化的有效性,可以满足电磁直线执行器控制性能要求,所提方法为伺服系统控制器中控制参数的优化设计提供了一定的理论参考基础。

Aiming at the problems of high control performance and long design cycle of electromagnetic linear actuator control parameters,a multi-objective optimization design method of control parameters was proposed.Based on electromagnetic linear actuator system,a robust controller was designed. The controller parameters was selected as optimization variables,ITAE criterion system,sine signal tracking down the amount of phase shift,overshoot amount under the step signal were taken as the optimization goal,the control parameters were optimized by using multi-objective particle swarm optimization(MOPSO)algorithm,the Pareto front was solved. Finally,the control parameters of the optimal solution were selected by correlation coefficient matrix of the control parameters and control system performance. The results show that the ITAE criterion JITAEin the electromagnetic linear actuator control system is decreased by 79.9% compared with that before the optimization,overshoot σ is decreased by about95.2% under the step signal,and under sinusoidal tracking,the phase shift S is decreases by about 79.7%. Summing up the above,the effectiveness of optimization is verified,which can meet the control performance requirements of electromagnetic linear actuator. The method provides a certain theoretical reference basis for the optimal design of control parameters in servo system controller.