The Development Of Simulation Platform For Attitude Control System Of The Canard Type Sounding Rocket

Sounding rockets for its advantages of launch flexible and low cost,are widely used in near-earth space detection and scientific experiment,such as meteorological observation,micro-gravity experiment,space science verification and so on,getting the attention of the space power more and more.In this paper,aiming at the sounding rocket's problem of large dropping point,weak anti-interference ability and limited launching environment,putting forward a simple control of sounding rocket by using the canard system and completing the development of simulation platform for attitude control system of the canard type sounding rockets.The simulation platform can be developed in the rocket stage,auxiliary staff to complete the design and performance evaluation of body.It is of great significance to ensure the successful launch of the rocket,reduce the launch cost,and protect the safety of the life and property of the personnel and the people around them.This article in the framework of the basic structure of the attitude control system,on the basis of the in-depth analysis of the control object,the canard actuator and the controller,combined with computer simulation technology to complete the development of the simulation platform,the main research contents are as follows:Firstly,the mechanical environment of the canard sounding rocket is analyzed,and the attitude Dynamics model of the projectile is deduced based on Newton's motion theorem and the momentum theorem.At the same time,considering the complex nonlinear coupling phenomenon of the model,a small deviation attitude dynamics model is established based on the Taylor series linearization theory and the small perturbation hypothesis,the variable step size iterative solution of benchmark trajectory parameters is completed.Secondly,on the basis of clarifying the work requirement of canard,we completed the structural design of the canard actuator.Based on the Adams software,the virtual prototype model of the canard actuator is built,and the dynamic simulation analysis of the canard mechanism is completed.The simulation results show that the mechanism has good dynamic characteristics and can realize the reciprocating deflection of the canard surface.Thirdly,after detailed analysis of the structure and function of attitude control system,.based on the theory of PID control,the design of attitude controller is completed.The MATLAB simulation software is used to complete the simulation analysis of the attitude control system.The simulation results show that the system has good stability and tracking performance.Finally,based on the MFC application framework,combined with MATLAB,C + +,My SQL database,the development of the simulation platform of the canard sounding rocket attitude control system is completed.This paper mainly introduces three key technologies,including interaction technology between MATLAB and C++,MATLAB connecting My SQL database,the development environment of simulation platform and its configuration technology.Respectively,from the interface layer,program layer and database layer details the implementation process simulation platform.Taking XX sounding rocket as an example,the simulation platform is used to simulate the trajectory,the attitude stability and the tracking performance,compared with the required data,the practicability of the simulation platform is verified.