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科学卫星的发展对卫星姿态控制系统提出了高控制精度和长飞行寿命下的高可靠性要求。在三轴稳定姿态控制的卫星上,采用有源姿态控制的喷气系统,较易于满足上述两项要求。对卫星的三个相互垂直的坐标轴x、y、z(图1)进行定向姿态控制,可分为发射进入轨道后的消旋姿态捕获和飞行中姿态控制两种情况,这两种情况都可以应用安装在卫星质心平面(图1中舱平面附近)星体边缘的一对喷嘴和安装在距离质心平面H距离的两对相互垂直喷嘴来实现。为了提高喷气系统比冲和减少星带燃料重量,目前多采用热喷气系统而不宜用冷喷气系统。本文讨论的几种方案均为热喷气系统。
The development of science satellite proposed high control precision and high reliability requirement for long flight life for satellite attitude control system. On three-axis stabilized attitude control satellites, the use of active attitude control of the jet system, easier to meet the above two requirements. Directional attitude control of the three mutually perpendicular axes x, y, z of the satellite (Figure 1) can be divided into two situations: the capture of the spin attitude after launching into orbit and the attitude control in flight, both of which This can be done by using a pair of nozzles mounted on the edge of the satellite’s centroid plane (near the plane of the cabin in Figure 1) and two pairs of mutually perpendicular nozzles mounted at a distance from the centroid plane H. In order to improve the jet system than the red and reduce the ribbon fuel weight, the current use of hot jet system instead of cold jet system. Several scenarios discussed in this article are hot jet systems.