The paper focuses on the implementation in Field Programmable Gate Arrays (FPGA) of vector control systems of the induction motor supplied from the tandem (hybrid) staticfrequency converter. Reconfigurable control structure ensures different strategies for operating modes with non-failed and partial-failed converter. The reconfiguration process introduces perturbations in the vector controlled ...

This paper presents a novel reconfigurable control method for an aircraft with potential actuator failures. A Variable Structure Model Reference Adaptive Control (VSMRAC) scheme is deployed to counteract the adverse effects when the actuator failure occurs. Combined with exponential reaching law, the convergence rate is improved and the chattering is reduced. This approach ensures that the refe...

This chapter explains methods for the automatic selection of a new control configuration after some fault has changed the dynamical properties of the plant. An automatic control system can use this method after severe faults have been detected in the plant by a monitoring algorithm. It chooses new actuators, new sensors, a new control law and possibly new set-points so as to stabilize the plant...

We study the coordination and control problem of distributed discrete-event systems with synchronous communication, in the presence of subsystems whose sensors and/or actuators may be affected by unexpected failures. We model sensor failures as permanent loss of observability of certain sensor events that belong to a subsystem, while characterize actuator failures as loss of controllability of ...

A new approach to manage actuator redundancy in the presence of faults is proposed based on reliability indicators and a reference governor. The aim is to preserve the health of the actuators and the availability of the system both in the nominal behavior and in the presence of actuator faults. The use of reference governor control allocation is a solution to distribute the control efforts amon...

A new method for the control reconfiguration of stable Hammerstein systems after actuator faults is described. The class of Hammerstein systems contains input-saturated systems, which are ubiquitous in practice. The new reconfiguration approach uses a virtual actuator that permits to keep the nominal controller in the loop. The concept of virtual actuators is extended to reflect the nonlinear p...

Supervisory control reconfiguration can handle the uncertainties including resource failures and task changes in discrete event systems. It was not addressed to exploit the robustness of closed-loop systems to accommodate some uncertainties in the prior studies. Such exploitation can cost-efficiently achieve reconfigurability and flexibility for real systems. This paper presents a robust reconf...

We introduce a framework for control-reconfiguration in discrete event systems that performs fault-detection and then reconfigures the control to ensure that certain desired specifications are met. The controlled system has separate specifications prior to a fault versus after a fault (to allow for any changes in the specification owing to the occurrence of a fault). Prior to the occurrence of ...

An approach is proposed for reconfigurable control structure design to obtain a system tolerant to state-variable sensor faults. The method is based on discrete-time constrained control design techniques for linear systems with state constraints, defined by linear equalities. Degradation in steady state performance is dealt with fixing that state variable which is associated with sensor fault t...

The paper presents the control design of a vehicle, which is driven by four independently driven inwheel electric motors and steered by the steering system. The direction of the vehicle is based on the steering, while driving and braking are based on the electric motors. Since the direction can also be modified by the appropriate operation of the four electric motors, reconfigurable and fault-t...