Research On Control Method In Electro-Hydraulic Servo System Of The Attitude Adjustment Platform

Wind tunnel test has a very important role in the aviation field and aerospace engineering. With the development of industry aerodynamic, the application field of wind tunnel has extended to industry like Transportation Building construction、 Wind energy utilization, etc. As the important part of wind tunnel, Control performance of attack angle mechanism also know as attitude adjustment platform, determines operation stability、loading capacity and motion precision.This topic is based on a wind tunnel reformation project, related researches are carried out on the technology of electro-hydraulic servo valve controlled motor system of the model attitude adjusting platform. Based on detailed analysis of the principle of platform of mechanical and hydraulic system, via fully consideration of the various factors affecting the control system precision, the transfer function of each component of the system are set up. Combined with the actual parameter values to determine the overall system mathematical model, the basic stability and system response analysis is carried out.For the electro-hydraulic servo system is a typical unknown uncertain nonlinear systems, To accelerate the speed of response and improve the control precision, classical PID control and fuzzy PID control intelligent algorithms are used, also controller design and Matlab simulation analysis are developed.After system modeling and simulation analysis of the PID and fuzzy PID intelligent control algorithms, Combined with the model attitude adjustment platform functional requirements, by analysis of the current feasible control method, the appropriate control scheme is determined, and give a brief description of hardware design, interface, software program, etc. Via overall performance test, the system control scheme is put forward to meet the needs of the platform control, the control scheme and control methods feasibility and operability is verified. The expected attitude adjustment target is implemented.Currently, the attitude adjustment platform has realized many kinds of model attitude adjustment action in wind tunnel, and is working in a good condition, also has a good control effect, provides a good hardware platform for improvement of wind tunnel and wind tunnel experiments.