【作者】 王建立；

【导师】 李顺利；

【作者基本信息】 哈尔滨工业大学 ， 飞行器设计， 2009， 硕士

【摘要】 本论文以跟踪与数据中继卫星系统中的中继卫星为研究对象,为实现中继星连续跟踪用户星,进而实现中继星对用户星轨道的精确测定这一目的,对中继星S频段相控天线展开、中继卫星高精度天线跟踪指向控制等问题进行了较深入的研究。描述了中继卫星在中继卫星系统中的作用和任务。利用Lagrange方程建立了相控天线展开的动力学模型,详细地推导了动力学方程中参数的求解过程,在考虑柔性耦合影响的基础上,对天线展开过程进行了数学仿真,并对仿真结果进行了分析。分析结果表明,此天线展开过程对卫星姿态影响不大,展开结束锁定过程中,惯性角速度和姿态角有小幅振动。利用Lagrange方程建立了中继卫星动力学方程,分析了中继星天线的工作模式。研究了中继卫星天线跟踪用户星的跟踪规律和圆锥扫描模式下天线方位角与俯仰角的运动规律。从工程应用角度,应用自抗扰控制理论,基于不确定的天线动力学模型,结合中继星天线工作模式与天线指向策略,设计了双环天线跟踪指向自抗扰控制系统,并进行了数学仿真。仿真结果表明,所设计的天线指向自抗扰控制系统能够实现天线俯仰通道和方位通道的解耦控制,完成天线跟踪指向控制的各种工作模式,并具有较高的跟踪指向精度。更多还原

【Abstract】 The Object of this dissertation is Tracking and Data Relay Satellite in the Tracking and Data Relay Satellite System.Its aim is to achieve TDRS tracks the user satellite continuously and surveys and evaluates the orbit of the user satellite.These problems of S-Band Phased array antenna expansion and Tracking and Data Relay Satellite’s antenna high-precision Tracking and Pointing Control were studied.The usage and task of Tracking and Data Relay Satellite in the Tracking and Data Relay Satellite System were described.The dynamics model of phased antenna expansion were built using the Lagrange equations. Solving process of some parameters in the dynamics model were detruded in detail Taking into account the effect of flexible coupling,the mathematical simulation of the dynamics equations was made,and the analysis of the simulation results was done too.The results show that the effect on the satellite attitude as a result of S-Band Phased array antenna expansion is weak,and that inertial angular velocity and attitude angle will have small vibration in the lock processThe satellite’s dynamics equation were built using the Lagrange equations,and the antenna operating modes were analysed.Then the tracking laws of Tracking and Data Relay Satellite’s antenna tracking the user satellite and the movement laws of the antenna’s azimuth and elevation angle in the conic scan mode were studied.From the perspective of engineering applications,active disturbance rejection control theory was applied. Running mode and pointing strategy of TDRS antenna were combined.The double closerd-loop Active Disturbance Rejection Attitude Control system was designed based on the antenna dynamic model with uncertainty.Mathematical simulation of the control system was made out.The results show the system can realize decoupling of the antenna’s azimuth and elevation angle in various modes and Pointing accuracy is very high.更多还原