Hybrid switching control method for micro-satellite station keeping

doi:10.16708/j.cnki.1000-758X.2018.0021

Chinese Space Science and Technology ›› 2018, Vol. 38 ›› Issue (4): 20-26.doi: 10.16708/j.cnki.1000-758X.2018.0021

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Hybrid switching control method for micro-satellite station keeping

YANG Bo^1,*, WEI Baojie¹, WEI Yanming², MIAO Jun¹

1. School of Astronautics, Beihang University, Beijing 100191, China
2. Beijing Institute of Control Engineering, Beijing 100190, China

Received:2017-12-20 Revised:2018-01-18 Accepted:2018-05-15 Published:2018-08-25 Online:2018-06-11

Abstract

Abstract:

Solid propellant micro-thruster array (SPMTA) as a new type of thrust device for micro-satellite station-keeping has the advantages of high accuracy, no fuel leakage and adjustable impulse. But the thrust of SPMTA is discontinuous, making the control system design different from the previous continuous system. To realize the full potential of SPMTA, a new control method for micro-satellite station-keeping was proposed based on the idea of switching control in hybrid system. First, the satellite discrete dynamic model was deduced according to the thrust characteristics of SPMTA. Then the hybrid switching control law was designed based on the Lyapunov stability theorem. Finally a numerical example of micro-satellite station-keeping was presented. Numerical simulation results indicate that the hybrid switching control method can accurately reflect the characteristics of SPMTA. The accuracy of station-keeping can reach 0.2 m and the consumption meets the satellite requirements of long time orbit operation.

Key words: micro-satellite, solid propellant micro-thrusterarray (SPMTA), hybrid switching system, orbit control

YANG Bo, WEI Baojie, WEI Yanming, MIAO Jun. Hybrid switching control method for micro-satellite station keeping[J]. Chinese Space Science and Technology, 2018, 38(4): 20-26.

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Hybrid switching control method for micro-satellite station keeping

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