ENERGY-SHAPING AND L2 GAIN DISTURBANCE ATTENUATION CONTROL OF INDUCTION MOTOR

A novel speed tracking control scheme of induction motor (IM) is presented based on the state error Port-Controlled Hamiltonian (PCH) system and L2 disturbance attenuation theory. Firstly, a PCH system model of IM is established. Secondly, using interconnection and damping assignment, the desired state error PCH structure is assigned to the closed-loop IM control system by the energy-shaping (ES) principle when the load torque is known. Thirdly, following the idea of rotor field orientation, the desired equilibrium of IM system is obtained. The equilibrium stability of the closed-loop system is verified. Moreover, the L2 gain load torque disturbance attenuation technology is applied to the PCH control of IM system. At last, proportional integral (PI) control is used to eliminate the steady state error brought by the load disturbance. The comparative studies and simulation results show that the proposed scheme has a good performance and application prospects.