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本文介绍广播卫星的姿态和轨道控制的问题,并讨论用户的任务要求与相应的姿态和轨道控制系统之间存在的相互协调问题。同时,还对过去和现有的卫星作一简单的评论。然后从摄动力和位置保持方法出发,来描述对地静止轨道的控制问题。三轴稳定卫星的姿态控制系统的设计是根据摄动力矩、姿态敏感器和执行机构以及鉴别各种不同系统的问题和解决办法而提出的。指向误差源及其误差估算的公式亦加以讨论,并提出向较高精度发展的几个方法。最后,对有关这种卫星可能达到的精度作出某些评论。
This article addresses the issue of attitude and orbital control of broadcasting satellites and discusses the interoperability issues that exist between users’ mission requirements and their corresponding attitude and orbit control systems. In the meantime, a brief comment on past and existing satellites is also made. Then, from the method of perturbation force and position keeping, the control of geostationary orbit is described. The design of attitude control systems for tri-axial stable satellites is based on perturbation moments, attitude sensors and actuators as well as identification of problems and solutions for various systems. The formulas for pointing error sources and their error estimates are also discussed, and several approaches to developing with higher precision are proposed. Finally, make some comments on the possible accuracy of such satellites.