基于扰动观测器和有限时间控制的永磁同步电机调速系统

针对采用矢量控制的永磁同步电机调速系统提出一种复合控制方法:首先用扰动观测器观测出系统中由于模型参数变化,负载改变等产生的扰动,并用此观测值作为前馈量补偿到输入端;然后运用有限时间控制方法设计系统前向通道中的反馈控制器;最后给出了控制器参数与速度误差收敛性能之间的数学关系.仿真表明,基于扰动观测器的有限时间控制具有更好的抗扰动性能和更优越的收敛性能.

PMSM speed-adjusting system based on disturbance observer and finite-time control

Based on the vector control speed-regulation system of permanent magnet synchronous motor,a compound control method is proposed.First,a disturbance observer is used to estimate the disturbance value of the system which is caused by model parameters change and load change.Then,this estimated value is used to construct a feedforward compensation which is added to the control input.Subsequently,the finite-time control theory is applied to the feedback control design for the forward channel.Finally,a relationsh...