A Laser Terminal Coarse Pointing Mechanism Working Mode Recognition and Position Control System

Abstract

The invention discloses a laser terminal coarse pointing mechanism working mode identification and position control system, comprising: a reference voltage output module for generating d-axis and q-axis reference voltages for the coarse pointing mechanism motor; a rotation coordinate inverse transformation module for The d-axis and q-axis reference voltages of the coarse pointing mechanism motor are subjected to inverse transformation of the rotating coordinates to generate the α-axis and β-axis reference voltages of the coarse pointing mechanism motor; the modulation module is used to adjust the pulse width of the α-axis and β-axis reference voltages of the coarse pointing mechanism motor modulation to generate pulses; the full-bridge inverter drive module is used to convert the DC input voltage into three-phase voltage according to the pulse; the permanent magnet synchronous motor is used to output the driving torque under the control of three-phase voltage; the shafting and load are used The corresponding rotation is carried out under the action of the driving torque. The invention solves the shortcomings that the traditional PID control method cannot take into account the fast dynamic response and no overshoot of the step response.

Description

technical field [0001] The invention belongs to the technical field of satellite laser communication, and in particular relates to a laser terminal rough pointing mechanism working mode recognition and position control system. Background technique [0002] Compared with the existing radio frequency communication, satellite laser communication has many advantages such as high transmission rate, large communication capacity, small size, light weight, and high confidentiality. It is considered to be the best solution for realizing high-speed inter-satellite communication. Many countries have successively carried out a lot of research work in related fields such as space laser communication. The coarse pointing and tracking system plays an extremely important role in satellite laser communication terminals, and is one of the key technologies for the success of inter-satellite laser communication. Tracking error as a consideration of dynamic performance and pointing accuracy of ...

AI Technical Summary

Problems solved by technology

The traditional PID regulator control method has the advantages of simplicity, good stability, and high reliability, but it cannot realize that the controller parameters can be adjusted according to different needs. The fixed PID parameters often can only meet the requirements of a single index, and cannot be considered at the same time. Requirements for rapid system response and no overshoot in steps

With the development of theories such as fuzzy control, neural network and genetic algorithm, the combination of traditional PID controller and these new theories has also produced a considerable number of new controllers, such as fuzzy PID controller, single neuron PID controller, internal model PID controllers and sliding mode variable structure PID controllers, etc., although these new controllers have improved the performance indicators of the control to a certain extent, they have disadvantages such as large amount of calculation, inaccurate parameter adjustment, and complex control structure. It is not common in engineering applications with high performance requirements

Images