地球观测卫星轮控系统单通道全物理仿真

地球观测卫星姿态控制系统是个复杂的，高精度，长寿命对地三轴稳定，在太阳同步轨道上帆板对太阳定向的系统，执行机构为动量轮，采用偏置方式构成整星零动量，由于卫星控制系统中采用动量轮，因此必须对轮子的摩擦力矩，轮子过零，轮子动量卸载等关键问题，进行深入研究，为了提高轮控系统可靠性，研究其动力学特性，发现问题，将轮子接入控制系统进行气浮台仿真是十分重要的。本文主要叙述地球观测卫星全物理仿真系统组成，系统仿真内容和方法，试验结果。

Single Axis Physical Simulation for Wheel Control System of the Earth Observation Satellite

The attitude control system of the earth observation satellite is a complicate, high accurate, long-life and earth-oriented three axis stable system with the solar panels orienting the sun in the sun synchronous orbit. The actuators are momentum wheels, which work in the bias mode and acquire the zero momentum of the whole satellite. Because the wheels are employed in the satellite attitude control system, it is necessary to study the friction, passing zero character,momentum unloading, and other key problems of the wheels deeply. In order to increase the reliability of the wheel system, to research its dynamic character, and to reveal the potential problems, it is very important to carry out the physical simulation using the air-bearing table with the wheel control system in the closed-loop. This paper mainly presents the composition of the single axis physical simulation system for the earth observation satellite, the content, method and the results of the simulation.