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Consider an unmanned aerial vehicle (UAV) operation from the time it is launched until the time it is put into an autonomous flight control mode. The control input u(t) during this time duration is modeled σu(t) and assumed healthy with σ = 1. In practice, however, the control inputs are less effective with a σ-value in the interval [0, 1) (Fan et al. 2012; Jayakumar and Das 2006; Hu et al. J. Guid...
In fault tolerant control, the damaged and healthy states of a sensor output or a control input are captured by using an uncertain parameter. For instance, the control input u(t) resulting from an actuator is modeled au(t) and the healthy and damaged conditions are inferred from a which takes the values σ=1 and σ in [0, 1), respectively [1-3]. Given a stabilizing controller, a range of σ-values in...
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