实验关于汽车空调温度系统优化控制仿真研究  

An Improved PID Algorithm for First-Order plus Dead-Time System

作　　者：郑岸以 林世平[1] 柯逍[1] 

机构地区：[1]福州大学数学与计算机科学学院,福建福州350116

出　　处：《计算机仿真》2016年第3期149-154,共6页Computer Simulation

基　　金：福建省自然科学基金(2013J05088)

摘　　要：汽车空调系统具有明显的非线性时变性和滞后性,采用传统的PID控制难以及时作出相应调整。根据传统PID控制理论,以一阶惯性纯滞后的汽车空调系统为例,将Smith算法和模糊控制算法与传统的PID控制策略相结合,减小了系统的超调量,增强了系统的稳定性。同时根据结合后的算法响应时间延长的缺陷,对原有Smith-Fuzzy-PID算法进行改进,即在控制量输出前加上一层专家PID控制,提出了一种改进的Smith-Fuzzy-PID算法。对三种控制器仿真结果的比较表明,改进Smith-Fuzzy-PID算法在减小超调量和响应时间上均优于原有Smith-Fuzzy-PID算法,说明改进算法针对一阶惯性纯滞后的汽车空调系统可行有效。Automobile air condition system has the characteristic of nonlinear time-varying delay and hysteresis, it is difficult to make accurate adjustment by traditional PID control method. In order to solve these problems, Smith algorithm and fuzzy control method were combined with traditional PID controll method, which was called Smith- Fuzzy-PID method. And to overcome the defects of this method, we presented an improved method based on tradi- tional Smith-Fuzzy-PID method. The simulations reveal that the improved Smith-Fuzzy-PID method can achieve good control effect. Simultaneously, the comparative data show that the improved method works more effective than both of traditional PID control method and traditional Smith-Fuzzy-PID methond on first-order plus dead-time system.

关 键 词：控制 模糊专家控制 改进史密斯模糊控制 一阶惯性纯滞后系统 

分 类 号：TP399[自动化与计算机技术—计算机应用技术]