In the vector control system

aiming at problems of slow identify response

low precision and poor stability of traditional speed observer

a kind of simplified gain matrix selection method is put forward

combined with optimization algorithm analysis

a kind of improved speed state observer is designed

and the new speed observer combined with MRAS is applied to speed-sensorless speed regulation system

the stability and observe precision of system is improved obviously

dynamic performance is also increased.The simulation model is constructed for corresponding control system in Matlab/Simulink.The simulation results show that speed control system with the improved observer is more rapid

it has more accurate identification and the system performance is more stable.