Design Of Laser Doppler Anemometer Steering Servo Control System Based On Neural Network Control

Wind power is rich resources in our country, the use of wind to generate electricity is a prospective industry, and the wind is one of the major environmental factors affecting industrial and agricultural production. So the accurate measurement of wind speed and direction for the human to better research and utilization of wind energy has a positive effect.The laser Doppler anemometer(LDA) is an instrument which can relatively accurately measure wind speed, and the air duct steering control device is the key subsystems of laser Doppler anemometer, it can measure the turning angle of the weather vane according to the rotary encoder of the weather vane and adjust the air duct in time, so that make the direction of the air duct can be as much as possible to the wind, let more wind into the air duct, thus based on the Doppler priciple,use the laser as measurement medium can get the wind accurate speed. At present, the research contents of the laser Doppler anemometer steering control device are rarely and remains to be further studied.This paper mainly studies the problem of laser Doppler anemometer, which load tracks vane angle change, it put forward and designs steering servo control system of the laser Doppler anemometer. The main work of this paper is divided into the following several aspects:(1) Firstly, the performance requirements of the steering servo system is analysed and according to the analysis result, the overall design scheme is proposed.(2) The components, the drive elements and detection devices of the case mentioned are selected minutely.(3) The mathematical model of steering servo system is established and aiming at shortcomings of the conventional PID control method in the servo motors, also considering the outstanding self-learning ability, good robustness and strong fault-tolerant features of neural network, the steering servo control system of laser Doppler anemometer based on neural network PID control is put forward. Simulations are made to compare with conventional PID control and neural network PID control through MATLAB software.(4) designing the hardware and software of the laser Doppler anemometer steering servo system controller, including the schematic and printed circuit board files are drawn by PROTEL software, the solid plate is processed by factory and the electrical components are welded by myself, using C language to write applications of the MCU and PC control program.