KEYWORDS: Space operations, Digital signal processing, Control systems, Vibration control, Signal processing, Field programmable gate arrays, Solar energy, Feedback signals, Control systems design, Bridges
"Tianzhou-1" cargo spacecraft is an important part of China's manned stations. Its main task is to add propellant and transport goods for the manned stations, and bring the station waste back to the atmosphere for burning. The "Tianzhou1" series cargo spacecraft is the backbone of the material supply of China's manned stations. The energy of cargo spacecraft in space comes from the flexible solar wing, but the solar wing is easy to vibrate by the unstable excitation from the platform. To solve this problem, the vibration response of the flexible solar wing system is analyzed, and the dynamic model of the flexible solar wing is established. On this basis, the control system is designed by using negative velocity feedback and linear quadratic optimal regulator, and then the vibration is suppressed. Finally, the experimental verification of vibration control of flexible solar wing of cargo spacecraft is realized by designing the experimental system of peripheral circuit, driving circuit and position detection circuit of processor based on DSP + FPGA. Through experimental verification, the system can realize the vibration suppression function of the extension mechanism with high disturbance, and realize the engineering application that the large flexible solar wing can expand and close repeatedly and smoothly. It has certain application value and provides reference for subsequent engineering applications.
KEYWORDS: Antennas, Control systems, Data transmission, Fuzzy logic, Satellites, Field programmable gate arrays, Control systems design, Data modeling, Analytical research, Telecommunications
The space data transmission antenna system is an important channel for the telemetry data transmission of the satellite platform to the ground. Therefore, the logarithmic antenna has high requirements for the pointing stability to the ground. The pointing accuracy of the data transmission antenna is seriously affected by the vibration of the satellite platform. Therefore, this paper analyzes the vibration of an orbiting spaceborne data transmission antenna, models, simulates, analyzes and calculates the logarithmic transmission antenna, optimizes the antenna system structure based on this, and designs a fuzzy adaptive PID control system under decentralized control for closed-loop control, The simulation test of the antenna system under the real vibration environment is carried out through the vibration test. The results show that the antenna system has stable performance and can effectively suppress the vibration, which verifies the reliability and feasibility of the antenna system. At present, the data transmission antenna has been put into orbit with satellite launch, and its performance indexes are stable, the research results can be used as a reference to improve the vibration safety of relevant spaceborne antennas.
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