A Stabilization Unit By The Use Of Fuzzy PID Controller On Shipboard

Considering some requirements of the engineering project,a stable platform needs to be designed to isolate the carrier and the object equipped on it.Especially in some certain conditions,the structure of the platform has more different with other ordinary platform.The paper introduces The Application on Fuzzy PID Control in Stable Platform Control System.In chapter 1,first introduce the basic concept,structure,principle,application, development and the researsh status of the stable platform,then introduce the development,application,advantage and disadvantage of the electro-bydraulic servo control technology,and the development,application,characteristic of PLC.Finally bring forward the research content and research method of the project.In chapter 2,introduce the structure of the platform,include the structure of actuating mechanism,the structure of electro-hydraulic servo driven system and control system of the platform,analyze the working principles and characteristics of all united parts,in order to construct the system model.In chapter 3,construct the model of valve-control parallel asymmetry cylinders, analyze the characteristics and control performances of the model.In chapter 4,design the model of Fuzzy Control and analye the characteristics by doing the simulationswith Matlab.It has the advantage of quickness.And it can get quickness with a very small temperature over setting point.But because its theory is not very perfect,the control quality cannot be expected in advance.Furthermore,it's a reference method bases on the membership function of the input and output variables,to get the program is very difficult.And it has error when it comes steady.In chapter 5,to offset the shortage of fuzzy PID control and PID control,I design the model of Fuzzy PID Control.In chapter 6,this paper does simulation of three methods and then selects the fuzzy PID method.Combining the advantages of PID control algorithm and fuzzy control, fuzzy PID control could realize online adjusting of PID parameters,so as to quicken the control system response speed,reduce the overshoot,shorten the transitional period,and decrease the oscillating time.The system has strong robustness and stability,and plays a leading role in fuzzy control.