What is it about?
To accomplish spacemissions such as in-orbitmaintenance and servicing, deep space exploration and imaging, and earth monitoring, spacecraft formation flying (SFF) control has been extensively studied under various scenarios. With no prior knowledge of faults and inertia, an adaptive approach is proposed to reject the influence of disturbances and uncertainties.
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Why is it important?
With no prior knowledge of faults and inertia, an adaptive approach is proposed to reject the influence of disturbances and uncertainties. Meanwhile, combining with a consensus algorithm and graph theory, an adaptive fault-tolerant attitude synchronization tracking control law is presented to regulate the attitude to a common time-varying reference state. Aiming at optimizing the control law, a dynamic adjustment function is introduced to adjust the control gain according to the attitude tracking error.
Perspectives
I hope more scholars join this study on spacecraft formation flying (SFF). To accomplish space missions such as in-orbit maintenance and servicing, deep space exploration and imaging, and earth monitoring, SFF has been a feasible technology. The main contributions of our work are as follows: a) The proposed control approach provides fault-tolerant capability for SFF system with actuator faults or failures. b) The presented control scheme is robust adaptive to unknown time-varying inertia and disturbances. c) A dynamic adjustment function is introduced to optimize the control torque according to attitude error. d) It can regulate the attitude of follower to the time-varying reference attitude with consideration of actuator faults or failures, unknown time-varying inertia and external disturbances concurrently.
Zhihao Zhu
Nanjing University of Science and Technology
Read the Original
This page is a summary of: Adaptive fault-tolerant attitude tracking control for spacecraft formation with unknown inertia, International Journal of Adaptive Control and Signal Processing, September 2017, Wiley,
DOI: 10.1002/acs.2822.
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