Tracking Control Mathod For The Moving Parts On A Satellite

The rapid development of space technology to promote the use of the spacecraftto be more advanced and diversified, the article discusses the satellite system withmoving parts which is equipped with a rigid moving part on the satellite platform.The dynamic model and tracking control method of the satellite system wouldsupport the development of complex aircraft. This paper focuses on three aspects:(1) Establishing the coupled dynamic model of the satellite system with movingparts. The satellite system with moving parts consists of three parts, the center rigidbody, the rotatable part and the solar array. So when the model is established, wemust solve coupling dynamics problem between the center rigid body and therotatable part first. In this paper, Lagrange equation method is used to solve theproblem. Another important factor must be considered is the vibration of the solararray, which can impact the attitude of satellite system. This paper uses concentratedmass method to set up the model of solar array.(2) Analyzing satellite coupled dynamic model and making simulation. This partis divided into two parts, one is to discuss the disturbance torques of externaldisturbances on the system such as the external disturbance moment from spaceenvironment, the gravity gradient moment, and the liquid sloshing moment. Anotheris to analyze the characteristics of the system coupling dynamic model. Usingcomputer simulation to observe the vibration of solar array and the coupledrelationship between center rigid body and rotatable part when satellite system isrotating.(3) To design the control method of satellite system and make simulation. In thispaper, the model reference output tracking control method is used to solve thetracking target motion problem. We use three examples to show the effect of modelreference output tracking control method. These instances are the target linearmotion, the target curve movements and the target accompanying motion. Thesimulation shows that the tracking controller allows the system to achieve therequired performance indicators.