【摘要】 烷氧基化装置温度控制系统具有大时滞特性,温度高效控制困难.建立系统数学模型;提出内环为PD控制器,外环为Smith预估器与线性自抗扰控制相结合的控制策略,以解决时滞系统采用自抗扰控制时扩张状态观测器输入信号不同步及Smith预估器抗扰能力差的问题;设计线性自抗扰控制器;从不同点加入扰动进行数值仿真实验,仿真结果证明了所提出方法的有效性.更多还原

【Abstract】 The temperature control system of alkoxylation device has a characteristic with large time-delay,which brings difficulty to the efficient control of temperature. The mathematical model of the system is established. It is proposed that the inner loop is a PD controller and the outer loop is a combined strategy of Smith predictor and LADRC(Linear Active Disturbance Rejection Control) which can solve the problem of non-synchronization of input signal of ESO(Extended State Observer) by LADRC in time-delay system as well as poor anti-interference performance of Smith predictor. LADRC is designed. Numerical simulation is carried out by adding disturbance from different points and the results of the simulation prove the effectiveness and correctness of the proposed method.更多还原