基于Fminsearch的时滞系统Dahlin控制方法研究  

Research of Dahlin control for time-delay system based on Fminsearch

作　　者：庞晓楠[1] 于天琦 

机构地区：[1]海军潜艇学院,山东青岛266042 [2]哈尔滨工程大学自动化学院,黑龙江哈尔滨150001

出　　处：《应用科技》2016年第3期54-59,共6页Applied Science and Technology

基　　金：国家自然科学基金项目(61374007、61273081、61104036);中央高校基本科研业务费专项资金(HEUCFX41309)

摘　　要：针对以温度过程为代表的时滞系统中存在输出超调大、稳定性差的控制问题,提出了一种基于无约束非线性规划函数的Dahlin控制方法。先利用无约束非线性规划函数Fminsearch对被控对象模型参数进行辨识,得到被控对象模型参数,再通过Dahlin算法将系统闭环传递函数设计成纯延迟环节加一阶惯性环节的形式,从而可以得到满足被控系统闭环响应的控制器。仿真结果表明:通过设计Dahlin控制器并与传统PID及Smith预估控制对比,系统超调量及稳态误差得到了很好的控制,且具有很好的鲁棒性。In order to solve the output overshoot, poor stability control problems existing in the time-delay system re-presented by temperature process, a Dahlin control algorithm based on the nonlinear programming function was putforward. The method first used the unrestraint nonlinear Fminsearch function to identify model parameters of thecontrolled object, obtaining the model parameters of the controlled object, then the closed-loop transfer function ofthe system was designed as the first-order inertial form with pure delay link through the Dahlin algorithm, finallyobtaining the controller which meets the closed-loop response of the controlled system. Computer simulation showsthat, compared with the traditional PID control and the Smith prediction control, the system overshoot and steady-state error are well controlled, and has good robustness through the design of Dahlin controller.

关 键 词：时滞系统 纯延迟 DAHLIN控制器 系统超调 

分 类 号：U666.1[交通运输工程—船舶及航道工程]