Fuzzy sliding mode position sensorless control of permanent magnet synchronous motor
A super rotating sliding mode fuzzy observer was proposed to address the system chattering problem caused by the switching of sliding mode variables on the sliding mode surface and nonlinear changes in velocity.The high-frequency chattering in sliding mode observer(SMO)can have a signifi-cant impact on the motor control system,leading to speed fluctuations and steady-state errors in the mo-tor.In order to weaken the chattering problem of SMO,aiming at the chattering problem caused by dy-namic changes in the approaching velocity of sliding mode dynamic variables,by introducing fuzzy logic theory,the trend speed of system state variables was intelligentized.Fuzzy rules were set to achieve intel-ligent dynamic speed,with the distance between the system dynamic variables towards the switching sur-face and the dynamic trend speed of the state variables as the rule factors,and dynamic intelligent trend speed was achieved;Secondly,in response to the system chattering caused by the system switching func-tion,a continuous function F(s)was further adopted to replace the discontinuous sgn(s)symbol function.This scheme effectively weakens the chattering problem of the system and improves the stability of the sys-tem compared with SMO control.
permanent magnet synchronous motorsensorless controlsliding mode observerfuzzy con-trolhigh frequency chatteringsliding mode control
万方数据
维普
