《一类时滞系统的PID控制方法研究》》-毕业论文.doc

摘 要 在各种实际的工业系统中，时滞是一种普遍存在的现象。其存在是引起系统不稳定和性能变差的重要原因；因此，分析时滞现象对系统动力学行为及控制性能的影响，以及如何利用或消除这种影响一直是控制理论与控制工程领域的研究热点。近年来，有关时滞系统的研究国内外学者在时滞控制的理论研究和实践操作上做了大量的研究工作，相继提出了很多行之有效的控制方法。 课题主要研究的是时滞系统的PID控制，PID控制具有结构简单、容易实现、控制效果好等特点，是迄今为止较稳定的控制方法。它所涉及的参数物理意义明确，理论分析体系完整，因而在工业过程控制中得到了广泛应用。在简单的PID控制基础上论文提出了改进型的积分分离PID控制和Smith预估算法，相较于简单PID控制这两种算法能有效地提高控制精度减小超调，仿真效果良好。 关键词：时滞；PID控制；Smith预估补偿控制 Abstract Time delays are often encountered in various practical systems．It has been shown that he existence of delays in a dynamic system may result in instability, oscillations or poor performances. Therefore, the stability analysis and the synthesis of controllers for time—delay systems have received considerable attentions over the decades．In recent years, the study of domestic and foreign scholars systems with time delays in delay control theory research and practice operation on doing a lot of research, have put forward many effective control method. This paper focuses on the PID delay control system. PID controller is simple in structure and easy to be realized, with good control effect is the more stable control method by far. The parameters associated with the physical meaning is clear and the theoretical analysis system is integrity, in consequence it is widely application in the industrial process control. Based on the simple PID control this paper puts forward on the improved version of the integral PID control and Smith-predictor method, compared with simple PID control the two algorithm can effectively improve control accuracy reduced system’s overshoot,the simulation reslut reasonable. Keywords: Time delays; PID control; Smith-predictor 目录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc327858156 摘 要 PAGEREF _Toc327858156 \h I HYPERLINK \l _Toc327858157 Abstract PAGEREF _Toc327858157 \h II HYPERLINK \l _Toc327858159 1 绪论 PAGEREF _Toc327858159 \h 1 HYPERLINK \l _Toc327858160 1.1 时滞现象的研究背景 PAGEREF _Toc327858160 \h 1 HYPERLINK \l _Toc327858161 1.2 时滞控制算法发展综述 PAGEREF _Toc32785816