Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 37 for “"fault-tolerant control"”.
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Fault-Tolerant Control of Unmanned Underwater Vehicles
… unknown environment. It is necessary to embed fault-tolerant control paradigms into UUVs to increase the reliability of the vehicles and enable them to execute and finalize complex missions. Specifically, fault-tolerant control (FTC) comprises fault detection, identification, and control …
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Fault-tolerant control policies for multi-robot systems
… mobile robots might perform include formation control, rendezvous, distributed estimation, deployment, flocking, etc. Also, there are challenging tasks that are more suitable for a group of mobile robots than an individual robot, such as surveillance, exploration, or hazardous environmental …
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Fault tolerant control for an electric power steering system
… mounted EPS is improved by adding an alternate control scheme that is tolerant to a torque sensor failure (FTC). To accomplish this, a motor model based observer is used to estimate the total torque on the motor shaft. An independent estimate of the road reaction torque is generated from vehicle …
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Observer based active fault tolerant control of descriptor systems
The active fault tolerant control (AFTC) uses the information provided by fault detection and fault diagnosis (FDD) or fault estimation (FE) systems offering an opportunity to improve the safety, reliability and survivability for complex modern systems. However, in the majority of the literature …
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Observer-based robust fault estimation for fault-tolerant control
A control system is fault-tolerant if it possesses the capability of optimizing the system stability and admissible performance subject to bounded faults, complexity and modeling uncertainty. Based on this definition this thesis is concerned with the theoretical developments of the combination of …
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Detection filters for fault-tolerant control of turbofan engines
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1981.
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Fault tolerant control for nonlinear aircraft based on feedback linearization
The thesis concerns the fault tolerant flight control (FTFC) problem for nonlinear aircraft by making use of analytical redundancy. Considering initially fault-free flight, the feedback linearization theory plays an important role to provide a baseline control approach for de-coupling and …
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Active fault-tolerant control of nonlinear systems with wind turbine application
… concerns the theoretical development of Active Fault-Tolerant Control (AFTC) methods for nonlinear system via T-S multiple-modelling approach. The thesis adopted the estimation and compensation approach to AFTC within a tracking control framework. In this framework, the thesis considers several …
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On-line estimation approaches to fault-tolerant control of uncertain systems
This thesis is concerned with fault estimation in Fault-Tolerant Control (FTC) and as such involves the joint problem of on-line estimation within an adaptive control system. The faults that are considered are significant uncertainties affecting the control variables of the process and their …
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Sensor and actuator selection for fault-tolerant control of flexible structures
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1989.
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In-Flight Testing & Verification of an Adaptive Distributed Fault-Tolerant Control Architecture
… Its scalability, efficiency, robustness, fault tolerance, and cost-effectiveness make it ideal for performing real-world missions that require more than one agent. However, in completing the tasks, the multi-agent systems are still vulnerable to environmental disturbances, cyber-attacks, …
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Model based methods for sensor fault-tolerant control of rail vehicle traction
This thesis explores the application of modem fault-detection methods to electric rail traction drives. Such drives consist of three main components, induction motors, power inverters and the control system. The power electronics are relatively simple so the scope for fault-tolerance is limited, …
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Fault Tolerant Control of Large Flexible Space Structures under Sensor and Actuator Failures
In this thesis, we study fault tolerant control (FTC) for the decentralized robust servomechanism problem (DRSP) of a colocated large flexible space structure (LFSS) under sensor and actuator failures (SAF). The control objective is to devise a decentralized controller that maintains the stability …
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Fault tolerant control of active trailer steering systems for multi-trailer articulated heavy vehicles
Faults in a controlled plant often deteriorate the system performance. In severe cases, faults pose a risk of component damage, plant shutdown or even personnel safety. Fault Tolerant Control (FTC) aims at preventing the escalation of rectifiable faults to serious failure. A FTC system combines …
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Design of a fault tolerant control scheme based on sliding mode for Canadian supercritical water reactor
… the waste heat more efficiently, a well-designed control system for the Canadian SCWR is needed. The SCWR is a nonlinear and strongly coupled multiple-input multiple-output (MIMO) plant. Traditional controller design method, which divides the MIMO system into subsystems and then designs each …
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Reliable energy-maximising control for wave energy converters enabled by fault diagnosis and fault-tolerant control
L'abstract è presente nell'allegato / the abstract is in the attachment
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UAS Model Identification and Simulation to Support In-Flight Testing of Discrete Adaptive Fault-Tolerant Control Laws
… importance to develop robust strategies for fault-tolerant systems that can countermeasure system degradation and consequently support the integration into the National Airspace (NAS). This thesis research illustrates the results of systems identification that is performed using DATCOM …
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Fault-Tolerant Control and Fault-Diagnosis Design for Over-Actuated Systems with Applications to Electric Ground Vehicles
This dissertation addresses the fault-tolerant (FT) control and fault detection and diagnosis (FDD) problems for certain over-actuated systems with applications to electric ground vehicles. Two different control effort grouping methods are proposed to transfer the over-actuated system model to a …
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Aircraft System Identification Approach for Control Surface Fault Diagnosis
Modern fault detection and diagnosis (FDD) methods are critical to maintaining flight vehicle safety. This thesis presents a model-based FDD approach for identifying control-surface loss of effectiveness on a small, fixed-wing research aircraft. The work considers several real-time system …
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Stability and Performance of Propulsion Control Systems with Distributed Control Architectures and Failures
Future aircraft engine control systems will be based on a distributed architecture, in which, the sensors and actuators will be connected to the Full Authority Digital Engine Control (FADEC) through an engine area network. Distributed engine control architecture will allow the implementation of …
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