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This paper focuses on the switched nonlinear non-minimum phase thrust-vector vertical take-off and landing (VTOL) aircraft model, and proposes a cascade observer-based robust fault tolerant control method to guarantee that the multi model faulty system outputs track desired signals effectively. Cascade observers are designed to estimate the unknown disturbance and fault of each flight mode. By using...
This paper studies the spacecraft formation flying problem where the formation needs to switch among different shapes due to mission demands, the dimension of formation will change due to shape transition. The whole flying process is modeled as an impulsive state-varying system. Moreover, the state jump is also considered between switching instant. During the flying process, fault may occur unavoidable...
This paper presents an adaptive neural network observer based fault-tolerant control approach to a class of uncertain nonlinear system. This approach can not only deal with the unknown nonlinear faults from the actuators, but also from the plant. Moreover, the scheme can be easily implemented in the control engineering by relaxing the fault-tolerant control law. The uniform ultimate boundedness of...
This paper focuses on the supervisory fault tolerant control design for a class of nonlinear systems with faults ranging over a finite cover. The proposed framework is based on switched system approach, and relies on a supervisory switching among a family of pre-computed candidate controllers without any additional model. Each faults set can be accommodated by a set of controllers under an appropriate...
In this paper, a new active fault tolerant control strategy is proposed for the plant in the presence of actuator fault and input constraints, which is a combination of a direct adaptive control algorithm with multiple model switching, and the μ-modification is introduced in the model reference control architecture. Based on Lyapunov-Krasovskii stability theory, the stability of overall system is...
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