Event-Triggered Attitude-Tracking Control for a Cableless Non-Contact Close-Proximity Formation Satellite

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.

Event-Triggered Attitude-Orbit Coupled Fault-Tolerant Control for Multi-Spacecraft Formation

“…Combined with event triggering, research on the optimal control, adaptive control and other methods have been carried out [23,24]. Some of them have applied related methods to spacecraft attitude and orbit control systems [25][26][27][28][29], and demonstrated the effectiveness of the proposed control algorithm through theoretical analysis and simulation. However, most studies only consider the attitude control system or the orbit control system separately.…”

“…(2) In [25] and [28], the event-triggered mechanism is static, while in this paper, a dynamic event-triggered mechanism is proposed. Since some external variables are introduced in our dynamic event-triggered mechanism, the proposed dynamic eventtriggered mechanism can be adaptively adjusted.…”

“…Proof. Considering the dynamic event-triggered mechanism (24), it can be known that ∀t ∈ (28), it can be directly derived that . η(t) ≥ −(α + 1/β)η(t), ∀t ∈ [t k , t k+1 ).…”