To apply run-time reconfiguration there is need for an appropriate model to understand reconfiguration. System on chip technology allowed the use of complex low gate/price new type of FPGA. Modelling reconfiguration and using Matlab tools is possible to simulate and rapid prototype vector control systems. The paper presents the reconfigurable models as introduced by Luk, Cheung, Shirazi and Ath...

This research report focuses on the use of unknown input observers for detection and isolation of actuator and effector faults with control reconfiguration in overactuated systems. The proposed approach consists in tuning the observer parameters in order to make the filters decoupled from faults affecting selected groups of actuators or effectors. The control allocation actively uses input redu...

A reconfigurable control approach for continuous-time piecewise affine (PWA) systems subject to actuator and sensor faults is presented. The approach extends the concept of virtual actuators and virtual sensors from linear to PWA systems on the basis of the fault-hiding principle that provides the underlying conceptual idea: the fault is hidden from the nominal controller and the fault effects ...

Given a basic graph Y and a desired level of fault-tolerance k, an objective in fault-tolerant system design is to construct a supergraph X such that the removal of any k nodes from X leaves a graph containing Y . In order to reconfigure around faults when they occur, it is also required that any two subsets of k nodes of X are in the same orbit of the action of its automorphism group. In this ...

Boiler-turbines are one of the most important parts in power generation plants. The safety problem in such systems has always been a special concern. This paper discusses the application of control reconfig uration by fault-hiding approach for a boiler-turbine unit. In Fault-hiding approach, after occurrence of a fault, nominal controller of the system remains unchanged; instead, a reconfigurat...

In this paper we present an approach for combined fault diagnosis and reconfigurable control structure for a general class of hybrid systems. In this approach a plant is modeled using an extended version of bond graphs, namely hybrid bond graph, where discrete mode transitions are represented as binary switch junctions. A hybrid observer has been developed that uses this model to track the syst...

An optimization approach to control reconnguration, based on eigenstructure assignment , for control systems with output feedback is presented. The emphasis is on the recovery of the nominal closed-loop performance, which is determined by the closed-loop eigenvalues and eigenvectors. The proposed scheme preserves the max(r; q) most dominant eigenvalues of the nominal closed-loop system and dete...