Application research on improved active disturbance rejection control in air speed regulation of local ventilator
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摘要: 针对现有用于矿井局部通风机风速调节的自抗扰控制算法存在控制信号波动剧烈，进而造成变频器和电动机产生冲击振荡的问题，提出了一种改进型自抗扰控制算法。该算法采用反正切函数与幂函数相结合的改进方法，反正切函数用于增强控制算法的线性程度，保证函数在原点处有更好的平滑性，幂函数用于保证控制算法的跟踪速度，加快控制算法的收敛速度。将改进型自抗扰控制算法应用到煤矿井下局部通风机风速调节中，经过该算法处理过的电压信号作为局部通风机变频器的输入信号，输出频率信号改变异步电动机的转速，最终实现局部通风机风速的动态调节。仿真结果表明，与现有PID控制算法、自抗扰控制算法相比，改进型自抗扰控制算法在控制速度和抗干扰能力方面有明显提高，可实现局部通风机风速的快速稳定调节。Abstract: In view of the problem of strong fluctuation of control signal in the existing active disturbance rejection control algorithm for air speed regulation of mine local ventilator, which causes shock and vibration of frequency converter and motor, an improved active disturbance rejection control algorithm was proposed. The algorithm uses an improved method combining the arctangent function and the power function, the arctangent function enhances the linearity of control algorithm, ensures better smoothness at the origin of the function, and the power function guarantees the tracking speed of the control algorithm, and speed up the convergence of the control algorithm. The improved active disturbance rejection control algorithm is applied to the air speed regulation of mine local ventilator. The voltage signal processed by the control algorithm is used as the input signal of inverter of the local ventilator, and output frequency signal changes the speed of the asynchronous motor, so as to realize the dynamic adjustment of air speed of the local ventilator.The simulation results show that the improved active disturbance rejection control algorithm has obvious improvement in control speed and anti-interference ability compared with the existing PID control algorithm and active disturbance rejection control algorithm, which can adjust the air speed of local ventilator rapidly and stably.
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