过程控制系统的前馈反馈复合控制器设计

摘要

Along with the process control system performance requirements of the constant improvement, the traditional feedback control strategy is difficult to adapt to the different conditions of the controlled object dynamic characteristics. The feedforward-feedback hybrid control strategy is proposed, The design method and the specific operation steps are given to design the feedforward controller which does not realize in physics. The simulation in a process control system results show that; Feedforward-feedback compound control to measurable disturbance in effect before the system output to compensation; The dynamic function and the stable performance are better than traditional feedback control. The feed-forward controller in physics not realized technology problem is solved, having a certain theoretical meaning and reference value for engineering.%随着对过程控制系统性能要求的不断提高,传统反馈控制策略难以适应不同工况下被控对象动态特性的改变.提出了前馈-反馈复合控制策略,研究了前馈控制器在物理上不可实现情况下的设计方法,给出了具体操作步骤.在过程控制系统中应用的仿真结果表明:前馈-反馈复合控制能够将可测扰动在影响系统输出前得以补偿；系统的动态性能和稳定性能均优于传统反馈控制.解决了扰动通道时滞小于主控通道时,前馈控制器在物理上不可实现的技术难题,对过程控制系统有一定理论意义和工程参考价值.