基于事件驱动的航天器星下点轨迹维持控制

doi:10.7527/S1000-6893.2023.29412

Abstract

Abstract:

A fuzzy adaptive control method based on event-triggered mechanism is proposed for high precision autonomous orbit maintenance of ultra-low orbit spacecraft with limited communication and atmosphere drag perturbation. Firstly， a spacecraft orbit dynamics model is established based on the relative average orbital elements. The fuzzy adaptive control method is used to estimate the nonlinear function caused by atmosphere drag. Then， an event-triggered mechanism placed on the controller cellular satellite is proposed to reduce the communication burden and computation. Meanwhile， constant control thrust over a certain period of time can be ensured which can extend the lifetime of electric thrust cellular satellite. An event-triggered-based fuzzy adaptive autonomous orbit maintenance controller is designed for maintaining subsatellite point trajectory. Finally， the effectiveness of the proposed control algorithm is verified through simulation results.

Key words: ultra-low orbit spacecraft, atmosphere drag, autonomous orbit maintenance, event-triggered mechanism, fuzzy adaptive control

CLC Number:

V448.21

Kai NING, Baolin WU. Event-triggered-based orbit maintenance control for spacecraft subsatellite point control[J]. Acta Aeronautica et Astronautica Sinica, 2024, 45(10): 329412-329412.

Figures/Tables 15

Fig.1

Fig.2

Fig.3

Table 1

Mean orbital elements of spacecraft

参数	数值	参数	数值
$a / m$	6 646 349	$a R / m$	6 646 149
$e$	0.000 1	$e R$	0.000 1
i $/ (°)$	98	$i R / (°)$	98
$ω / (°)$	0	$ω R / (°)$	0
$Ω / (°)$	65	$Ω R / (°)$	64
$u / (°)$	1	$u R / (°)$	0

Table 1

Table 2

Spacecraft characteristic parameters

航天器参数	数值
质量/kg	100
面质比	0.002
$C D$	2.2
$F 10.7$ /sfu	194

Table 2

Table 3

Selection of control parameters

控制参数	数值
控制增益	$k 1 = 0.002 5$
	$k 2 = 0.001$
	$k 3 = 0.001$
	$ζ = 0.000 1$
事件驱动参数	$α = 0.15$
	$γ = 0.000 000 01$
模糊控制参数	$η = 0.000 5$ $σ = 1$

Table 3

Fig.4

Fig.5

Fig.6

Fig.7

Fig.8

Fig.9

Fig.10

Fig.11

Fig.12

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Event-triggered-based orbit maintenance control for spacecraft subsatellite point control

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