Abstract
The cablelessness of non-contact close-proximity formation satellites can fundamentally avoid the influence of non-contact interface coupling effects and can further enhance the attitude pointing accuracy and stability of the payload module (PM). However, it also brings the problem of limited on-board resources and system latency. In this paper, an event-triggered attitude tracking controller of the support module (SM) that avoids the Zeno phenomenon was proposed. The update time of the control signal was determined by the event-triggering mechanism based on intermediate variables, thus, reducing the communication burden and actuator asynchrony between the two modules. The feasibility and effectiveness of the proposed approach was demonstrated by numerical simulations.
Highlights
Motivated by the above-mentioned research, in this paper, we proposed an eventtriggered attitude tracking control for a cableless non-contact close-proximity formation satellite and avoid the Zeno phenomenon
We considered the support module (SM) attitude tracking control problem after the initial release, when the state of the non-contact close-proximity formation satellite tended to be stabilized
This research sought to address the problem of limited on-board resources and system latency of the cableless non-contact close-proximity formation satellites
Summary
The non-contact close-proximity formation satellite, consisting of a PM and an SM separated by the non-contact Lorentz actuator (NCLA), has significant application potential and can provide a satellite platform with ultra-high attitude pointing accuracy and stability for space gravitational wave detection [1,2], next-generation space telescopes [3,4], and other space exploration missions [5,6]. Plug-and-play accessories and modularity have become trends of future spacecrafts [22,23] Under this condition, cablelessness can avoid non-contact interface coupling effects, it brings problems such as limited on-board resources, communication time delay, and actuator asynchrony [24]. When the release process is completed, the SM will perform “less demanding” close formation tracking control At this time, the entire satellite state tends to be stabilized; if it is possible to reduce the update frequency of the SM control signal, the delay problems caused by the software and hardware can be further reduced and the SM tracking control can be accomplished more effectively. Motivated by the above-mentioned research, in this paper, we proposed an eventtriggered attitude tracking control for a cableless non-contact close-proximity formation satellite and avoid the Zeno phenomenon.
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