一种基于自适应的复合PID控制在非对称缸电液伺服系统中的应用  

Application of Composite PID Controller in Asymmetric Cylinder Electrohydraulic Servo System

作　　者：刘子龙[1] 刘国忠[2] 刘洁[3] 庄显义[1] 

机构地区：[1]哈尔滨工业大学控制科学与工程系,哈尔滨150001 [2]哈尔滨工业大学计算机科学与技术学院,哈尔滨150001 [3]东北轻合金有限责任公司计量控制中心,哈尔滨150060

出　　处：《机床与液压》2004年第6期102-105,共4页Machine Tool & Hydraulics

摘　　要：众所周知 ,非对称缸五阶电液伺服系统是一类典型高阶非线性、时变、增益不对称系统 ,动态特性随负载变化很大 ,使用常规PID控制很难满足性能指标的要求 ;2 0 -SIM仿真软件是建立在键图理论上的仿真工具 ,适合于非线性系统仿真。基于以上特点 ,本文采用 2 0 -SIM仿真工具建立仿真模型 ,并设计了一种基于自适应的复合BPNN控制策略 ,这种控制策略包括常规的PID控制和BPNN控制。将其控制的仿真结果与常规PID控制、单神经元PID控制的仿真结果相比较 。It is well known that asymmetric cylinder fifth -o rder electrohydraulic servo system is a class of typical high-order one with non -linearity, time-varying and gain asymmetric. Because dynamic performances of th e servo system vary greatly with the variable load, 20-SIM simulation software i s a simulation tool based on bond graph theory, and it is very suitable for simu lation of nonlinear systems.Based on the aforementioned characteristics, a simul ation model using 20-SIM simulation tool was set up, and a composite PID control ler based on adaptability, that consist of a conventional PID controller and an BPNN controller was designed. Compared with the conventional PID controller and single neuron PID controller,simulation results showed that this reformed PID co ntrol strategy based on adaptability was better than the other two.

关 键 词：增益不对称 单神经元PID 键合图 20-SIM 复合PID 

分 类 号：TH137[机械工程—机械制造及自动化]