抑制量测噪声的大功率异步电动机自抗扰矢量控制

异步电机矢量控制过程中通过测速装置获取电机转速信息,而检测元件由于受到干扰、量化误差以及电机运行状况等因素影响,导致转速信息中混有噪声需要经过滤波处理,但传统的转速滤波方法不能兼顾实时性和精度要求.线性扩张状态观测器具有系统输出信号滤波的功能,在传统线性扩张状态观测器通道增加滤波环节提高噪声抑制能力,对观测器升阶处理以...

Active Disturbance Rejection Vector Control for High-Power Asynchronous Motor to Suppress Measurement Noise

In the process of asynchronous motor vector control, the motor speed information is obtained through the speed measuring devices. Influenced by such factors as interference, quantization errors, and motor operating conditions, the detection elements gives the speed information mixed with noise that needs to be filtered, but the traditional speed filtering method cannot consider both real-time and precision requirements. The linear extended state observer (LESO) has the function of filtering the output signal of the system. The traditional LESO channel is added with filtering to improve the noise suppression ability, and the observer is upgraded to improve the observation ability, thereby improving the contradiction between the system response speed and controller noise suppression. In the frequency domain, the improved linear active disturbance rejection controller is analyzed through the Bode diagram in terms of stability, tracking and anti-disturbance. The theoretical analysis shows that the improved active disturbance rejection controller can reduce the effects of the noise at the controller input and system feedback. The simulation results have verified the effectiveness of the controller in noise suppression.