Design And Research Of The Integrated Simulation Platform For Satellites Attitude Control System

The attitude control system is an important part of a satellite.However,there is no conditions on earth to simulate the on-orbit space environment,such as vacuum,micro gravity,magnetic field,light,etc.,which restricts the test of satellite attitude control system.Therefore,it plays a very important role in the manufacture of satellite system to evaluate the satellite attitude control system using simulation technology.With the rapid development of satellite technology,the requirements for the simulation platform of attitude control system,such as versatility,reliability,human-computer interaction,flexibility and so on,have been put forward.At the same time,it is necessary to establish a complete joint simulation loop for on-orbit satellite and ground,in order to meet the needs of the performance evaluation of the control system.According to the application requirements,this paper completes the design and research of the integrated simulation platform for satellite attitude control system based on the current research status.Based on Matlab and Satellite Tool-Kit(STK),the integrated simulation platform is standardized,configurable and interactive.Full process simulation verification and performance analysis can be conducted in the platform,including mathematical simulation,hardware-in-the-loop simulation and on-orbit attitude detection.Meanwhile,the attitude of satellite can be dynamically displayed with 3D models.The research contributions of this paper are as follows:(1)The relevant mathematical models of satellite attitude control simulation are analyzed in detail,including the satellite orbit,space environment,attitude dynamics,sensor and actuator,and the design principle of standardized and modular structure with mathematical simulation system of high reliability.Complying with the standardized and modular design principles,a mathematical simulation system of high degree credibility is established.(2)A hardware-in-the-loop simulation for attitude control system is realized without a turntable.Using a standard communication protocol and on-board integrated test interfaces,the simulation platform propose plug-and-play support of test hardware.The whole satellite can also be access to the platform testing the influence of residual magnetism on the attitude control system.(3)Through the UDP network interface,the telemetry data of satellite is load to the simulation platform and drive three-dimensional dynamic display interface on STK.By this means,real-time information such as satellite orbit and attitude can be displayed in 2D/3D,and used for quickly determine of satellite state.On the other hand,The telemetry data can also be connected to the mathematical simulation model,which can provide a visual contrast between the actual control effect and the theoretical simulation results.It is helpful in the judgement of emergency state and analysis for control effect.(4)Based on the application of ZDPS-2 satellite,the simulation platform is proved to have realized the mathematical simulation,hardware-in-the-loop simulation and on-orbit attitude detection function,and effectively test and evaluated the performance of satellite attitude control system.In summary,the integrated simulation platform for the satellite attitude control system realizes many functions,including mathematical simulation,hardware-in-the-loop simulation for single attitude control system or complete satellite,visualization of telemetry information and attitude control simulation combining on-orbit data and ground model.It provides the technology support for whole process from design to implementation of a satellite attitude control system,which has some reference value for simulation research and project practice.