Ground testing system for active vibration abatement of flexible spacecraft

Abstract

The invention provides a ground testing system for the active vibration abatement of a flexible spacecraft, which comprises a marble air-floating platform, a flexible spacecraft motion simulator suspending above the marble air-floating platform, a rate gyroscope, a photoelectric type attitude sensor, a vibration measuring system, an attitude control flywheel, an attitude control thruster, an orbit control thruster, a vibration abatement system, a motion simulator control computer, a ground measurement system and a ground console. The rate gyroscope, the photoelectric type attitude sensor, the vibration measuring system, the attitude control flywheel, the attitude control thruster, the orbit control thruster and the vibration abatement system are mounted on the flexible spacecraft motion simulator. The motion simulator control computer is mounted on the flexible spacecraft motion simulator and is electrically connected with the rate gyroscope, the vibration measuring system, the attitude control flywheel, the attitude control thruster, the orbit control thruster and the vibration abatement system. The ground measurement system is arranged on the marble air-floating platform and the flexible spacecraft motion simulator. The ground console is connected with the photoelectric type attitude sensor, the motion simulator control computer and the ground measurement system. According to the technical scheme of the invention, the defect that the flexible vibration characteristics of flexible spacecrafts are hard to simulate can be overcome. Therefore, the attitude determination accuracy of the flexible spacecraft motion simulator can be improved.

Description

technical field [0001] The invention relates to a ground testing system for active vibration suppression of a flexible spacecraft. Background technique [0002] With the development of space missions, the flexibility of the payload carried by the spacecraft is getting bigger and bigger, and the fundamental frequency is getting lower and lower, which brings great interference to the attitude control of the spacecraft. The requirements are getting higher and higher, and the active vibration suppression method is one of the key technologies to solve the high-precision and high-stability control of flexible spacecraft. [0003] At present, the active vibration suppression methods proposed for the high-precision and high-stability control of flexible spacecraft are mostly limited to theoretical research and verification of mathematical simulation methods, and the existing ground simulation test systems do not have the ability to simulate natural frequencies below 0.1Hz The free-...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a ground test system for active vibration suppression of flexible spacecraft, which overcomes the problem that the characteristics of flexible vibration of flexible spacecraft are difficult to simulate, and comprehensively uses piezoelectric ceramic sensors and angular displacement sensors to expand the vibration collection frequency range of flexible accessories. The ground measurement system is used to improve the position measurement accuracy of the motion simulator, and the integrated rate gyroscope and photoelectric attitude sensor information is used to improve the single-axis attitude determination accuracy, which improves the attitude determination accuracy of the flexible spacecraft motion simulator

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