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In this paper, integral sliding mode control ideas are incorporated with control allocation, to design fault tolerant controllers for longitudinal and lateral control of a large transport aircraft. The proposed scheme has the capability to retain nominal performance even in the face of total failure of certain actuators, provided there is enough redundancy in the system. During faults or failures,...
A Fault Detection and Isolation (FDI) method for a generic 3D aircraft is presented. The behavior of the aircraft is described by a nonlinear control-affine model, which is closed-loop controlled by a classical guidance, navigation and control (GNC) algorithm. The proposed FDI procedure exploits the redundancy induced by this control module, along with the accelerations measured by the Inertial Measurement...
In this paper, a class of non-autonomous continuous switched linear systems is modeled by an adaptation of the Differential Petri Nets (DPN) formalism. Afterwards, a hybrid observer based state feedback control is proposed and sufficient LMI conditions for stabilizing the closed loop dynamics are provided. The latter is obtained using the separation principal for linear switched systems and the design...
In this paper, an approach to design an Admissible Model Matching (AMM) Fault Tolerant Control (FTC) based on Linear Parameter Varying (LPV) techniques is proposed. The main contribution of the proposed approach consists in the on-line reconfiguration of the controller based on the use of LPV gain-scheduling techniques that allow to take into account changes in the system parameters due to changes...
An output-feedback direct adaptive control problem is considered for a class of linear time delayed measurements systems with polytopic-type parameter uncertainties and disturbances. The objective is to make the system output follow the output of a system model and to attain guaranteed H∞ performance of the proposed adaptive control scheme. The time-delay is either constant (known) or time-varying...
The present paper uses set theoretic methods for the design of a fault tolerant control scheme in the case of a multisensor application. The basic principle is the separation of invariant sets for the estimations of the state and tracking error under healthy and faulty functioning. The fault scenario is based on abrupt changes of the observation equations. The main contribution is the introduction...
This paper deals with an important practical control problem in systems that can switch between different operating modes. We presents a self-conditioned implementation of any two-degree-of-freedom (TDOF) controller which allows a smooth transition when switching between a controller acting in closed-loop and another controller in a bank of idle controllers waiting to take over the control loop. Here,...
This paper presents a fault tolerant multisensor strategy for feedback control of a class of nonlinear systems upon a geometrical approach. A key point to ensure fault tolerance is the separation between healthy and faulty closed-loop behavior. Here we achieve this through set theoretic operations upon sets describing the healthy/faulty behavior of the system. The results rely both on an appropriate...
This paper describes the results of an application of a PDC type T-S fuzzy control to synchronous machine. The non linear mathematical model for the proposed synchronous machine adopted in this work is described by T-S continuous fuzzy models. Next, the control law for T-S fuzzy control based on PDC design is studied. The stability and the stabilisation of the whole closed-loop model are investigated...
The paper deals with a general formulation of the optimal active change detection and control problem for stochastic systems, which includes several design problems as special cases. The special case treated in this paper can be characterized as a decision making problem where decisions are transformed into inputs of a system and the aim is to control the system. The utilization of the general formulation...
In this paper, a robust fault-tolerant control strategy for constrained multisensor linear systems, subject to sensor faults and in the presence of bounded state and output disturbances is proposed. The scheme verifies that for each sensors-estimator combination, suitable residual variables lie inside pre-computed sets and selects the more appropriate combination based on a chosen criterion. An active...
The problem of H∞ control design for vibration reduction of a base isolated structure with limited wireless communication capacity is studied in this paper. The network under consideration is subjected to measurement quantization, signal transmission delay, and data packet dropout, which appear typically in a network environment. Based on Lyapunov-Krasovskii functional (LKF) theory, some delay-range-dependent...
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