For the control system of magnetic levitation linear synchronous motor of computer numerical control(CNC)machine tools,hybrid H2/H∞ robust control is proposed.Firstly,the mathematical model of magnetic levitation linear synchronous motor of CNC machine tools is established by considering the uncertain perturbation,and the end effect.Secondly,the H∞ robust control is combined with the LMI to design an H∞ robust controller based on the LMI.Thirdly,in order to improve the dynamic performance of the system,a hybrid H2/H∞ robust controller based on LMI is designed.Finally,the simulation results prove that the hybrid H2/H∞ robust control can effectively improve the convergence speed and response sensitivity of the system under the premise of ensuring the system robust stability.
关键词
数控机床磁悬浮直线同步电动机/H∞鲁棒控制/混合H2/H∞鲁棒控制/LMI
Key words
magnetic levitation linear synchronous motor of CNC machine tools/H∞ robust control/hybrid H2/H∞ robust control/LMI
万方数据