This paper addresses the design of a fault tolerant controller to handle actuator degradation passively in context of attitude control on a hexacopter system. The design is accomplished with the use of the framework for linear parameter-varying (LPV) systems. Based on a nonlinear model of a hexacopter a quasi-LPV model is obtained. The parameter vector of the LPV system is supplemented by an additional parameter to consider the actuator degradation. An LPV state feedback controller design is accomplished with a partly measurable parameter vector since the actuator degradation is assumed to be unknown during operation. The capabilities of the designed controller in handling actuator degradations is shown in nonlinear simulations of the hexacopter system.
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