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Robust Reconfigurable Control for Parametric and Additive Faults with FDI Uncertainties
"... From the system recoverable point of view, this paper discusses robust reconfigurable control synthesis for LTI systems and a class of nonlinear control systems with parametric and additive faults as well as derivations generated by FDI algorithms. By following the modelmatching strategy, an augmen ..."
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From the system recoverable point of view, this paper discusses robust reconfigurable control synthesis for LTI systems and a class of nonlinear control systems with parametric and additive faults as well as derivations generated by FDI algorithms. By following the modelmatching strategy, an augmented optimal control problem is constructed based on the considered faulty and fictitious nominal systems, such that the robust control design techniques, such as H# control and synthesis, can be employed for the reconfigurable control design.
Compensation of jammed control surface of large transport aircraft by control reconfiguration
"... AbstractThis paper addresses the control allocation to several aircraft flight controls to produce required body axis angular accelerations. Two methods of control law design are used to produce the virtual control effort signals, which are then distributed by solving sequential least squares prob ..."
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AbstractThis paper addresses the control allocation to several aircraft flight controls to produce required body axis angular accelerations. Two methods of control law design are used to produce the virtual control effort signals, which are then distributed by solving sequential least squares problem using active set method to the flight control surfaces to generate this effort. Two cases are described: in the first case the control law and allocation for the healthy aircraft is implemented, and in the second case, jamming of one control surface is introduced at time zero. In this case it was shown that how controller and allocation compensate for this failure without changing the control law. To implement this system it was assumed that there is a good fault identification system onboard. Normally aircraft are overactuated and in the case of a control failure this over actuation is more pronounced due to coupling of aircraft dynamics. The problem of control allocation presented here is a convex problem so there is always a unique solution.
Synthesis of Robust Restructurable/Reconfigurable Control by ModelMatching Strategy
"... A novel approach to robust restructurable or reconfigurable control synthesis is proposed by using the modelmatching strategy. The design requires the transfer function matrix of the recon gured closedloop system should match that of the nominal closedloop system in the H1norm sense. Besides reg ..."
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A novel approach to robust restructurable or reconfigurable control synthesis is proposed by using the modelmatching strategy. The design requires the transfer function matrix of the recon gured closedloop system should match that of the nominal closedloop system in the H1norm sense. Besides regarding the control redesign as the reconfigurable control, the control mixer concept is used for the synthesis of the robust restructurable control. The current robust control techniques such as H1 control and synthesis can be employed for the restructurable/reconfigurable control synthesis. Therefore, the recon gured system performance, stability and robustness can be considered simultaneously. Furthermore, this approach can deal with parametric and additive faults as well as system uncertainties, which includes the possible variations about the FDI information.
Fault Tolerant Control With ReConfiguring SlidingMode Schemes
"... In this paper, a controller design method for linear MIMO systems is presented which a sliding mode controller is reconfigured in case of system faults. Faults are detected with the residual vector generated from a standard linear observer. Once a fault has been detected the fault distribution matri ..."
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In this paper, a controller design method for linear MIMO systems is presented which a sliding mode controller is reconfigured in case of system faults. Faults are detected with the residual vector generated from a standard linear observer. Once a fault has been detected the fault distribution matrix can be obtained and used to update the corrective or equivalent control parts of the sliding mode controller. As a result, fault tolerant adaptive controllers keep the system performance within acceptable limits or at least avoids the system to windup.
Conference on Dedsion and Control Sydney, Australia December, u)oo Robust Reconfigurable Control for Parametric and Additive Faults with FDI Uncertainties
"... From the system recoverable point of view, this paper discusses robust reconfigurable control synthesis for LTI systems and a class of nonlinear control systems with parametric and additive faults as well as derivations generated by FDI algorithms. By following the modelmatching strategy, an augm ..."
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From the system recoverable point of view, this paper discusses robust reconfigurable control synthesis for LTI systems and a class of nonlinear control systems with parametric and additive faults as well as derivations generated by FDI algorithms. By following the modelmatching strategy, an augmented optimal control problem is constructed based on the considered faulty and fictitious nominal systems, such that the robust control design techniques, such as H, control and p synthesis, can be employed for the reconfigurable control design. 1
NUMERICAL LINEAR ALGEBRA WITH APPLICATIONS Numer. Linear Algebra Appl. (2012) Published online in Wiley Online Library (wileyonlinelibrary.com). DOI: 10.1002/nla.1849 Second moment constraints and the control problem of Markov
"... This paper addresses the optimal solution for the regulator control problem of Markov jump linear systems subject to second moment constraints. We can characterize and obtain the solution explicitly using linear matrix inequalities techniques. The constraints are imposed on the second moment of both ..."
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This paper addresses the optimal solution for the regulator control problem of Markov jump linear systems subject to second moment constraints. We can characterize and obtain the solution explicitly using linear matrix inequalities techniques. The constraints are imposed on the second moment of both the system state and control vector, and the optimal solution is obtained in a computable form. To illustrate the usefulness of the approach, specially that for systems subject to abrupt variations and physical limitations, we present an