《基于MATLBA自整角机随动系统设计》-毕业论文.doc

PAGE 摘 要 位置随动系统是应用非常广泛的一类系统，主要实现执行机构对位置指令的准确跟踪，被控制量一般是负载的空间位移，当位置指令随机变化时，系统能使被控制量准确无误地跟随。在实现角位置闭环控制的伺服系统中，完成角位置测量是实现闭环控制的先决条件。角位置测量是这类控制系统的重要组成部分，同时也是实现其它控制功能的基础。自整角机（下文皆用自整角机）由于具有结构简单、工作可靠和精度高等特点，经常用于轴角的测量。本设计选择自整角机位置随动系统为具体研究对象。系统包括以下几个环节：自整角机、相敏整流器、可逆功率放大器、执行机构及减速器。基于上述模型，本文对系统的误差进行了简单分析，指出各种误差来源并写出具体表达式和数学关系，并针对性地提出了有效校正方案。在误差分析的基础上完成了系统基于MATLAB软件的仿真，具体为闭环系统在单位阶跃响应进行SIMULINK仿真，仿真结果表明自整角机位置随动系统的稳定性和快速性都达不到标准要求，此时采用PD和PID调节器进行校正，结果表明系统总体工作稳定可靠，指标满足设计要求。 关键词： MATLAB；自整角机；随动系统；自动控制系统；稳态误差 Abstract Position servo system is a very broad application class system, it mainly accomplish that the position instruction is tracked well and truly by executive actuator, controlled variables is the spatial displacement of load, when the position instruction changes random, controlled variables can be controlled precisely by the system. In accomplishing the loop control servo system of angular position, accomplishing the angular position measurement is the implementation. Angular position measurement is an important part of the control system, and the fundamental of other control function implements Synchro has simple structure, reliable and high precision characters, is often used for measurement of the rotation angle. This paper takes Synchro Position servo system for specific subjects. The system includes the following parts: Synchro, phase-sensitive rectifier, reversible power amplifier, actuators and reducer. Basing on the model, the paper analysis the system error, indicates error sources and its expression and the mathematical relationships, and put forward a reliable calibration scheme. The simulation of the system is implemented based on error analysis and simulate the step response by SIMULINK , the results show that the system’s stability and rapidity can not achieve the requirements, hence PD and PID are derived in to adjust the system. At last the results show that the system works stable and the indicators meet the design requirements . Keywords： MATLAB; Syn