Fault detection and recovery of spacecraft formation flying using nonlinear observer and reconfigurable controller

Fault-tolerant control for multiple networked spacecraft under actuator saturation

“…If Assumptions 1 to 5 are satisfied, the approximation errorsẼ andF of optimal weight matrix are uniformly ultimately bounded, and the attitude error and angular velocity error of each spacecraft will converge to a small neighborhood of zero under controllers (10) to (16). Before moving on, redefining the weight estimation errorsF andẼ asF…”

“…Control laws (10) to (16) are applied to solve the fault-tolerant attitude tracking problem, i.e. the states of all spacecraft will converge to the virtual leader's state.…”

“…In Zou and Kumar, 15 the authors presented a distributed adaptive fault-tolerant attitude coordination control law, and the proposed algorithm should obtain the acceleration of neighboring spacecraft, which increases the cost and complexity related to sensors. A fault observer and a re-configurable control law were proposed in Lee et al 16 for the spacecraft leader-follower formation, in which the fault reconstruction and detection were accomplished through the use of a super twisting sliding mode observer. However, the above works have proposed different fault-tolerate control methods, but they did not take the actuator dynamics and the orbit into consideration which play the important role in the actual process.…”

Finite‐time disturbance observer based integral sliding mode control for attitude stabilisation under actuator failure

“…During the design of AFTC, fault detection and diagnosis (FDD) mechanism is a fundamental and essential part, which provides system failures or uncertainties information. FDD‐based AFTC schemes have attracted considerable interests, especially for observer‐based approaches, such as non‐linear observer, robust observer, sliding mode observer, iterative learning observer, extended state observer (ESO) and so on [11–16]. Furthermore, in order to compensate for the lumped uncertainty/disturbance composed of external/internal disturbances and failures, disturbance observer (DO) has been considered as an effective way or an active approach to improve robustness, through estimating the lumped disturbance and designing DO‐based controller [17–19].…”

Research on the Calculation Method of the Collision Probability of Satellite Formation Flying

“…At present, the spacecraft formation flying is used to accomplish the task of space science experiment in the world. Such as A-Train plans and MMS plans from NASA [2,3].…”