Accurate control system of force array for gravity-unload based on voice coil motor

Hongshen Zhao

doi:10.1117/12.2514703

16 January 2019 Accurate control system of force array for gravity-unload based on voice coil motor

Hongshen Zhao

Proceedings Volume 10838, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies; 108381V (2019) https://doi.org/10.1117/12.2514703
Event: Ninth International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT2018), 2018, Chengdu, China

Abstract

Various communication satellites are more and more important for the country’s strategic development. As the eyes of satellites, Antennas play a key role in the entire satellite system and directly affect the communication quality of satellite systems. The surface accuracy of antenna restricts satellite communication to some extent. In the deterministic modification and accuracy improvement during antenna surface processing, it is necessary to reduce the deformation caused by the gravity. General method is to fix a feedback force array behind the antenna, which could offset the gravity deformation of the satellite surface. Voice coil motor is a special type of direct drive motor, which has the characteristics of generating magnetic force in the magnetic field and the current applied on the coil is proportional to the characteristics to achieve deterministic force or linear displacement set. Voice coil motor has a simple structure, small size and fast response, which is suitable for accurate displacement and force control. In this project, voice coil motor is used to realize the gravity-unload of the deformation in the CFRP antenna surface processing, and a model is established according to the shape characteristics of the CFRP antenna to be processed. At the same time, a distributed control system (DCS) based on CAN Modbus is designed to implement accurate control of the force array. Through a host-PC, deterministic forces could be easily transferred to each control unit. This paper shows out the design of single unit of force control based on voice coil motor, meanwhile, the DCS system and software on host-PC are illustrated at last.

Citation Download Citation

Hongshen Zhao "Accurate control system of force array for gravity-unload based on voice coil motor", Proc. SPIE 10838, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 108381V (16 January 2019); https://doi.org/10.1117/12.2514703

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KEYWORDS

Control systems

Antennas

Actuators

Mirrors

Optics manufacturing

Satellite communications

Satellites

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