Fault Tolerant Control Schemes Using Integral Sliding Modes

The key attribute of a Fault Tolerant Control (FTC) system is its ability to maintain overall system stability and acceptable performance in the face of faults and failures within the feedback system. In this book Integral Sliding Mode (ISM) Control Allocation (CA) schemes for FTC are described, which have the potential to maintain close to nominal fault-free performance (for the entire system response), in the face of actuator faults and even complete failures of certain actuators. Broadly an ISM controller based around a model of the plant with the aim of creating a nonlinear fault tolerant feedback controller whose closed-loop performance is established during the design process. The second approach involves retro-fitting an ISM scheme to an existing feedback controller to introduce fault tolerance. This may be advantageous from an industrial perspective, because fault tolerance can be introduced without changing the existing control loops. A high fidelity benchmark model of a large transport aircraft is used to demonstrate the efficacy of the FTC schemes. In particular a scheme based on an LPV representation has been implemented and tested on a motion flight simulator.

Reports, at an advanced level, the current state of the art in fault detection and fault tolerant control using integral sliding modes Describes the use of integral sliding modes within the framework of fault tolerant control problems for the first time Presents novel integral sliding mode FTC schemes for Linear Parameter Varying (LPV) plants which allow the schemes to retain closed-loop performance over a wider range of operating conditions whilst still exploiting well understood linear systems synthesis tools Includes case studies on how these schemes can be applied to problems arising in the flight control systems Includes supplementary material: sn.pub/extras

Inhalt
Fault Tolerant Control.- Integral Sliding Mode Control.- Design and Analysis of an Integral Sliding Mode Fault Tolerant Control Scheme.- A Fault Tolerant Direct Control Allocation Scheme with Integral Sliding Modes.- An Output Integral Sliding Mode FTC Scheme Using Control Allocation.- An Augmentation Scheme for Fault Tolerant Control using Integral Sliding Modes.- Nonlinear Integral Sliding Mode.- Linear Parameter Varying FTC Scheme Using Integral Sliding Modes.- Real-Time Implementation of an ISM Fault Tolerant Control Scheme on the SIMONA Flight Simulator.- Benchmark Model of Large Transport Aircraft.- Closed-Loop Stability and Feedback Gain Synthesis.