Fuzzy Control Of The Electro-Hydraulic Vibration Test Stand

Electro-hydraulic vibration test stand gets a wide range of application with its excellent performance in the actual industrial production, while the controller is more important as its control core. This article has researched using PID controller and fuzzy controller to control the trajectory of vibration test stand, and then analysed the effect of control parameters basing on the analysis of the status of the electro-hydraulic vibration test stand.Firstly, summed up the development and the status at home and abroad of electro-hydraulic vibration test stand and electro-hydraulic servo control technology, illustrated the formation, development process, characteristics and main applications of fuzzy control. Secondly, this article bases on seting up the linear mathematical model of electro-hydraulic vibration test stand, analysing and testing the static and dynamic characteristics of the servo valve and steady-state characteristics and dynamic characteristics of electro-hydraulic servo control system, grasping the inherent characteristics of the system itself. Researched control strategy and focused on the fuzzy control strategy. Thirdly, designed two type controllers, fuzzy controller and PID controller based on the Ziegler-Nichols tuning parameters empirical formula. Through a comparative analysis of the structure form and control theory of two types controllers, analyses the performance of system using Matlab/Simulink simulation tool, and using PID controller and fuzzy controller to control the effect of the simulation and the test, summing up the advantage and disadvantage of the two controllers. It has a good dynamic characteristics when using fuzzy controller to control the vibration test stand system. It has a better tracking when using PID controller to control the vibration test stand system.In order to achieving a higher stability, speed, accuracy, adaptability and robustness of electro-hydraulic vibration test stand, this issue uses of a combination of theoretical research, simulation analysis and test researching, puts fuzzy control to be the controller of the electro-hydraulic vibration test stand, Realizing the high-precision waveform tracking control of the electro-hydraulic vibration test stand.It is a new subject to study intelligent control method of electro-hydraulic vibration test stand. The results of their research will comprehensively promote the development of vibration test stand control technology.