Active fault tolerant control scheme for satellite attitude system subject to actuator time‐varying faults

Gao, Zhifeng; Zhou, Ziqian; Qian, Moshu; Lin, Jiaru

doi:10.1049/iet-cta.2017.0969

Cited by 45 publications

(39 citation statements)

References 44 publications

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“…Note that Assumptions and are some general constraints and have been widely used to satellite attitude systems in many published literature . Assumption requires the unknown sensor fault need to be bounded and could not change too fast, which is a common assumption in practical applications.…”

Section: Sensor Fementioning

confidence: 99%

“…The nonlinear term (x, t) in (7) is globally Lipschitz for ∀ x ∈ R 6 , namely, there exists a known positive scalar , such that the following condition is satisfied: Note that Assumptions 1 and 2 are some general constraints and have been widely used to satellite attitude systems in many published literature. 7,8,11,25,28,29 Assumption 3 requires the unknown sensor fault need to be bounded and could not change too fast, which is a common assumption in practical applications. Assumption 4 requires the controllability and observability of the plant before and after the occurrence of a fault, and it is a technical assumption required for well-posedness since the integrated FE/FTC design that we consider does not influence the fault adjustability of the considered attitude system.…”

Section: Sensor Fementioning

confidence: 99%

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Integrated fault tolerant attitude control approach for satellite attitude system with sensor faults

Qian

Zheng

2019

Optim Control Appl Methods

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Summary In this study, a novel integrated fault tolerant control (FTC) strategy is proposed for a rigid satellite attitude systems under the case of external disturbance, Lipschitz nonlinearity, and sensor faults. Different from the traditional adaptive fault estimation method, an augmented fault estimation observer is designed for the considered faulty satellite attitude system, which could be used for estimating both system state and sensor fault. A virtual observer is firstly introduced, and then, a real observer is derived as a result of the unmeasurable information to be used for the design of the virtual observer. On this basis, an integrated FTC approach is developed for the considered faulty satellite attitude system by combining backstepping control and fractional order nonsingular terminal sliding mode control techniques, such that the closed‐loop system not only has good robustness to external disturbance but also has better fault tolerance capability to unknown sensor fault. Finally, a simulation example is provided to demonstrate the feasibility and advantage of the proposed FTC scheme.

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Section: Sensor Fementioning

confidence: 99%

Section: Sensor Fementioning

confidence: 99%

Integrated fault tolerant attitude control approach for satellite attitude system with sensor faults

Qian

Zheng

2019

Optim Control Appl Methods

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“…Substituting adaptive laws (9) and equations (14) into (17) using Property 2 of the discontinuous-projection adaptive law yields the following equation:…”

Section: ) Fault Detectionmentioning

confidence: 99%

“…Because this method neglects the influence of disturbances and uncertainty, some false alarms may occur. Reference [14] investigates the active fault-tolerant control problem for the attitude system of a rigid satellite with parameter uncertainty, unknown exogenous disturbances and actuator time-varying faults. Han, Y. et al proposed a fault detection algorithm for an actuator stuck fault of an aircraft with multiple control surfaces [15], which is composed of an adaptive observer to detect faults and a bias estimation algorithm to estimate the stuck position.…”

Section: Introductionmentioning

confidence: 99%

A Novel RFDI-FTC System for Thrust-Vectoring Aircraft Undergoing Control Surface Damage and Actuator Faults During Supermaneuverable Flight

Dong

2019

IEEE Access

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In this paper, a novel robust fault detection and identification and fault-tolerant control (RFDI-FTC) system is proposed for thrust-vectoring aircraft (TVA) during supermaneuverable flight. To this end, a TVA model that incorporates control surface damage, actuator faults, disturbances, and aerodynamic parameter uncertainty is described, and a novel RFDI-FTC system is designed for the TVA model, which includes 1) an RFDI subsystem with robustness to disturbances and parameter uncertainty and sensitivity to control surface damage and actuator faults by multiple adaptive observers; 2) a command filter FTC subsystem to eliminate the differential expansion in traditional backstepping control and to compensate for control surface damage, actuator faults, disturbances and parameter uncertainty; and 3) a stability analysis for the RFDI-FTC system. The simulation results are given to demonstrate the effectiveness and potential of this system.

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“…The occurrence of actuator faults may lead to performance degradation or instability of the closedloop system, which should also be considered in the attitude stabilization control of combined spacecraft. In [22] and [23], adaptive non-linear fault estimation observer was designed to obtain the estimated value of unknown actuator faults. In [24], the problem of adaptive fault estimation and accommodation for a class of stochastic nonlinear systems with unknown time-varying faults was studied.…”

Section: Introductionmentioning

confidence: 99%

Robust Control Allocation in Attitude Fault-Tolerant Control for Combined Spacecraft Under Measurement Uncertainty

Huang

Duan

2019

IEEE Access

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Attitude control of combined service-target system in the post-capture phase has received great attention. A new attitude dynamics of the combined spacecraft with reaction wheels has been established in the author's former work, however, the measurement uncertainty in attitude and angular velocity and uncertainty in the reconfiguration matrix of reaction wheels have not been considered, which may cause huge impact on the system performance. In this paper, a novel combination of disturbance-observer-based dynamic surface control under measurement uncertainty and robust control allocation due to uncertain mass center is investigated for attitude stabilization of the combined spacecraft. Firstly, considering measurement uncertainty, inertia uncertainty, actuator fault and actuator saturation, a new attitude dynamics of combined spacecraft is established. Then, a virtual controller is designed and all the states in the closed-loop system converge to a small neighborhood of zero, where the lumped disturbance is compensated by two stable nonlinear disturbance observers and adverse effect of actuator saturation is addressed by a stable compensator. Finally, in consideration of uncertain location of mass center in the reconfiguration matrix, a LMI-based robust control allocation is employed to deal with the problem of distributing the three axis torques over the reaction wheels. Numerical simulations are presented to illustrate the effectiveness of the proposed method.

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Active fault tolerant control scheme for satellite attitude system subject to actuator time‐varying faults

Cited by 45 publications

References 44 publications

Integrated fault tolerant attitude control approach for satellite attitude system with sensor faults

Integrated fault tolerant attitude control approach for satellite attitude system with sensor faults

A Novel RFDI-FTC System for Thrust-Vectoring Aircraft Undergoing Control Surface Damage and Actuator Faults During Supermaneuverable Flight

Robust Control Allocation in Attitude Fault-Tolerant Control for Combined Spacecraft Under Measurement Uncertainty

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