Carwyn Edwards

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The problem of maintaining connectivity in a mobile communication network is considered. The agents consist of two classes: one class of agents, which is termed primary mission agents, performs surveillance operations that may or may not be coordinated efforts. The second class of agents, which is termed relay agents, is controlled to maintain the(More)
This paper considers a sliding mode based allocation scheme for fault tolerant control. The scheme allows redistribution of the control signals to the remaining functioning actuators when a fault or failure occurs. It is shown that faults and even certain total actuator failures can be handled directly without reconfiguring the controller. The results(More)
On-line parameter estimation over a wireless network based on sliding modes for a high fidelity simulation of a four engine transport aircraft is described in this paper. An approach using a sliding mode observer involving a second-order sliding mode `super-twisting' injection signal to estimate changes in the drag coefficient is proposed. A peer-to-peer(More)
This paper describes the real-time implementation of a model-reference sliding mode control allocation scheme on the SIMONA flight simulator. The scheme allows automatic redistribution of the control signals to the remaining functioning actuators when a fault or failure occurs. The system's closed-loop stability under certain classes of faults and failures(More)
A sliding mode controller using only measured output signals for the simultaneous stabilisation of a finite set of uncertain systems is proposed. A noteworthy feature of the approach is that it allows both matched and mismatched uncertainties to be considered. The proposed controller belongs to the class of static output feedback controllers. The synthesis(More)
This paper considers the problem of reconstructing, simultaneously occurring actuator and sensor faults in a nonlinear system. The theory which will be developed in this paper is based on a sliding mode observer formulation, designed around an LPV model approximation of the nonlinear system. It extends previous work which has independently considered(More)
This paper develops a sliding mode fault tolerant control scheme based on an LPV system representation of the plant. The scheme involves a control allocation component, which is capable of fully utilizing the available actuators in the face of actuator faults. In this paper, information about the actuator faults is assumed not to be available and therefore(More)
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