An improved installation for control moment gyros and its applications on reconfiguration and singular escape |
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| Institution: | 1. Key Laboratory of Dynamics and Control of Flight Vehicle, Ministry of Education, School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, PR China;2. School of Aerospace, Tsinghua University, Beijing 100083, PR China;1. Key Laboratory of Quantum Information, University of Science and Technology of China, Chinese Academy of Sciences, Hefei 230026, China;2. Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China;1. School of Internet of Things Engineering, Jiangnan University, Wuxi 214122, China;2. School of Science, Jiangnan University, Wuxi 214122, China;1. College of Computer and Information Technology, Shanxi University, Taiyuan, Shanxi 030006, China;2. Key Laboratory of Computational Intelligence and Chinese Information Processing of Ministry of Education, Taiyuan, Shanxi 030006, China |
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| Abstract: | A cluster of control moment gyros (CMGs) is widely used as the actuator of attitude control for modern satellite. However, to use CMGs will induce some accessional problems, like the singularity and the failure of them. In this paper, a rotator for the support bracket of each control moment gyro (CMG) is adopted and its application on reconfiguration and singular escape is discussed. The first step puts forward a novel reconfiguration scheme for the CMGs and applied on a satellite, which can adjust the installation angles of the remaining CMGs and make the CMGs remain axial symmetry. Then the characteristic of the output torque is studied in the process of reconfiguration of the CMGs. Based on this characteristic, a special steering law of the CMGs is designed to counteract the disturbance from the reconfiguration. The feasibility of singularity avoidance via the reconfiguration is also discussed by calculating the derivative of the singularity measurement to the installation angle. A singularity avoidance steering law is proposed based on the above calculation. |
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