Kaya I
Inonu University, Engineering Faculty, Electrical and Electronics Department, Malatya, Turkey.
ISA Trans. 2001;40(3):223-34. doi: 10.1016/s0019-0578(00)00054-9.
Many investigations have been done on tuning proportional-integral-derivative (PID) controllers in single-input single-output (SISO) systems. However, only a few investigations have been carried out on tuning PID controllers in cascade control systems. In this paper, a new approach, namely the use of a Smith predictor in the outer loop of a cascade control system, is investigated. The method can be used in temperature control problems where the secondary part of the process (the inner loop) may have a negligible delay while the primary loop (the outer loop) has a time-delay. Two different approaches, including an autotuning method, to find the controller parameters are proposed. It is shown by some examples that the proposed structure as expected can provide better performance than conventional cascade control, a Smith predictor scheme or single feedback control system.
许多研究致力于单输入单输出（SISO）系统中比例积分微分（PID）控制器的整定。然而，针对串级控制系统中PID控制器的整定，相关研究却很少。本文研究了一种新方法，即在串级控制系统的外环中使用史密斯预估器。该方法可用于温度控制问题，其中过程的次要部分（内环）延迟可忽略不计，而主要回路（外环）存在时间延迟。提出了两种不同的方法，包括一种自整定方法，用于确定控制器参数。一些例子表明，所提出的结构如预期那样，能够提供比传统串级控制、史密斯预估器方案或单反馈控制系统更好的性能。
