A test method for simulating the three-axis attitude coupling motion of a flexible satellite using a single-axis air bearing platform

Abstract

The invention discloses a test system for simulating flexible satellite three-axis attitude coupling movement with a single-axis air bearing table. The single-axis air bearing table is adopted for simulating the attitude movement of one axis of the satellite. The system comprises an attitude track control unit, an inertia reference unit, a mathematic model resolving unit, a control execution mechanism, an angle measuring device and a force moment output device, wherein the inertia reference unit is connected with the attitude track control unit, the mathematic model resolving unit is connected with the attitude track control unit, the control execution mechanism is connected with the attitude track control unit and the inertia reference unit, the angle measuring device is connected with the attitude track control unit, and the force moment output device is connected with the attitude track control unit. According to the test system for simulating flexible satellite three-axis attitude coupling movement, function extension is carried out on the single-axis air bearing table, the physical property and a mathematic model are combined, and resolving is carried out through the mathematic model, so that three-axis coupling force moment, flexible attachment disturbance force moment and space environment disturbance force moment borne by the satellite in the single-axis attitude movement process are achieved through a force moment output device, the effectiveness for verifying the flexible satellite single-axis attitude movement with the single-axis air bearing table can be improved, and the satellite ontrack single-axis attitude movement can be reflected more really.

Description

technical field [0001] The invention relates to a semi-physical simulation verification technology for single-axis attitude movement of a flexible satellite, in particular to a test method for simulating the three-axis attitude coupling movement of a flexible satellite by using a single-axis air bearing platform. Background technique [0002] With the development of space technology, the flight missions of modern satellites are becoming more and more complex. Generally, it is required to have the ability of fast maneuvering and fast stability control around any axis attitude, and the satellites are equipped with large antennas and large-area flexible sailboards. In the process of attitude movement, there is coupling among the three channels of satellite roll, pitch and yaw, which makes the problem of attitude movement around any axis of the satellite platform a nonlinear control problem in essence. [0003] The design of the satellite attitude control system is to design and...

AI Technical Summary

Problems solved by technology

[0005] The traditional single-axis air bearing test system can only simulate the one-dimensional attitude motion of the satellite, and cannot truly reflect the three-dimensional motion characteristics of the star; and the entire single-axis air bearing table is a rigid body, which lacks the ability to simulate load motion and vibration of flexible accessories. The simulator cannot simulate the disturbance torque generated by the load movement and the vibration of the flexible attachment, and cannot reflect the vibration characteristics of the flexible satellite's flexible attachment and the influence of disturbances such as three-axis coupling motion on the stability of the satellite's main body, that is, the use of single-axis air flotation It is difficult for the platform to truly and effectively reflect the on-orbit single-axis attitude movement of flexible satellites

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