Fault-Tolerant Attitude Stabilization for Spacecraft With Low-Frequency Actuator Updates: An Integral-Type Event-Triggered Approach

Sun

et al. 2021

AEAT

Self Cite

Purpose The purpose of this paper is to study the general actuator modeling in spacecraft attitude control systems. Design/methodology/approach The proposed module in this paper provides various non-ideal factors such as the second-order dynamic time response, time-delay, bias torques, dead-zones and saturation. The actuator module can make the simulation as close to the practical situation as possible. Findings This paper presents a practical integrated module for the simulation of attitude control algorithms. Based on theoretical modeling, we give simulation modules and numerical examples. The proposed model can be directly used in spacecraft control simulation. Instead of considering only a few of them, it makes the simulation more convincing. Though it may not be perfect, it is better than totally ignoring the actuator dynamics. Originality/value The authors provide an integrated actuator model for spacecraft attitude control simulation, considering as many nonlinear factors as possible once time.

Section: Spacecraft Attitude Control Structurementioning

confidence: 99%

Actuator model for spacecraft attitude control simulation

Sun

et al. 2021

AEAT

Self Cite

“…The system attitude dynamic model is expressed by Zhang et al (2021a): where J(t)=J¯+ΔJ∈ℝ3×3 denotes the inertia matrix which is a time-varying symmetric matrix, besides trueJ¯ and Δ J are the constant and time-varying parts, respectively. ‖J(t)‖ and ‖dJtrue(ttrue)dt‖ are assumed to be bounded.…”

Section: System Model and Problem Formulationmentioning

confidence: 99%

“…Attitude control system is crucial in spacecraft system (Zhang et al , 2021d). To develop modern dynamics systems, a safer, more reliable and economical operation, advanced attitude control algorithms have been investigated, such as event-triggered and quantization approaches for communication resource savage (Dai et al , 2021; Zhang et al , 2020a, 2020b, 2021a); fault-tolerant approaches for accommodating failures (Xiao et al , 2014), using neural-networks (Zhang et al , 2021b); appointed-time, prescribed performance control (Wei et al , 2018; Wang et al , 2021; Shao et al , 2018); control scheme under markovian jump framework (Zhang et al , 2021c); and actuator model for simulation (Zhang et al , 2021e).…”

Section: Introductionmentioning

confidence: 99%

Reset and prescribed performance approach to spacecraft attitude regulation

Dong

Leung

et al. 2021

AEAT

Self Cite

Purpose This paper aims to investigate the attitude regulation for spacecraft in the presence of time-varying inertia uncertainty and exogenous disturbances. Design/methodology/approach The high gain approaches are typically used in existing researches for theoretical advantages, bringing better performance but sensitive to parameter selection, making the controller conservative. A reset-control policy is presented to achieve the spacecraft attitude control with easy control parameter tuning. Findings The reset-control policy guarantees satisfying control performance despite using performance tuning function and saturation function besides reducing the conservativeness of the controller, thus reducing the effort in tuning control parameters. Originality/value Notably, the adaptive function owns a reset mechanism, which is reset to a preset condition when the controlled variable crosses zero. The mathematical analysis also shows the system trajectory can converge to a set centered at the origin.

“…Cooperative control between spacecraft also remains a challenge with less data transmission packets Belanger et al (2006). Therefore, control schemes with communication-saving property become a significant concern of the community Zhang et al (2020a); Liu et al (2020a).…”

Section: Introductionmentioning

confidence: 99%

Constructive schemes to spacecraft attitude control with low communication frequency using sampled-data and encryption approaches

Huang

et al. 2021

AEAT

Self Cite

Purpose Recent spacecraft attitude control systems tend to use wireless communication for cost-saving and distributed mission purposes while encountering limited communication resources and data exposure issues. This paper aims to study the attitude control problem with low communication frequency under the sampled-data. Design/methodology/approach The authors propose constructive control system structures based on quantization and event-triggered methods for intra-spacecraft and multi-spacecraft systems, and they also provide potential solutions to shield the control system's data security. The proposed control architectures can effectively save communication resources for both intra-spacecraft and multi-spacecraft systems. Findings The proposed control architectures no longer require sensors with trigger-ing mechanism and can achieve distributed control schemes. This paper also provides proposals of employing the public key encryption to secure the data in control-loop, which is transmitted by the event-triggered control mechanism. Practical implications Spacecraft attempts to use wireless communication, yet the attitude control system does not follow up promptly to accommodate these variations. Compared with existing approaches, the proposed control structures can save communication resources of control-loop in multi-sections effectively, and systematically, by rationally configuring the location of quantization and event-triggered mechanisms. Originality/value This paper presents several new control schemes and a necessary condition for the employment of encryption algorithms for control systems based on event-based communication.