H_∞ velocity controller design for polar-allocation-based linear servo system
CHEN Yi-xiu, WANG Yong-chu(College of Electromechanical Engineering & Automatization,Huaqiao University, Quanzhou 362021, China)
With regard to the directly-drive servo system of permanent magnet linear synchronous motor(PMLSM),a servo compensator is added to the curent loop using internal model.Simultaneously,a state feedback controller is developed based on the polar allocation and H∞ control method.In this manner,the closed-loop system poles are allocated in a region of linear matrix inequality(LMI) to guarantee dynamic performances e.g.prompt tracking;whereas,the system robustness is further enhanced via the H∞ control to resolve uncertainties e.g. loading interruption.From the simulation results,it is indicated that,compared with traditional control methods,this approach possesses such advantages as prompt yet precise tracking,anti-interruption and robustness.
【CateGory Index】： TM921.541