Fault diagnosis and reconfigurable control for flight control. The same approach can be used to design a bank of observers one figure 1. Fault detection by verifying the innovation mean 228 8. Fault diagnosis, failure prognosis and fault tolerant. The former case study regards an aircraft longitudinal autopilot and the latter one a satellite attitude control system, both in case of faults affecting the actuators. Practical issues in design and implementation i e e control.
Control reconfiguration of a boilerturbine unit after. In the section, a new structure for a fault tolerant aircraft flight control system based on innovation approach is offered. An aircraft flight control reconfiguration algorithm. Fault diagnosis and fault tolerant control strategies for. Request pdf research on the fault diagnosis of flight control system as the core of aircraft, the state of flight control system can impact the survivability and mission effectiveness of the. Zhu no static citation data no static citation data cite. This requires the integration of fault diagnostics with control in a feedback loop. This paper discusses the application of control reconfig uration by faulthiding approach for a boilerturbine unit. However, the airplane model, which is adopted commonly in fault diagnosis, only exists theoretically and is linearized in approximation. This paper presents an hierarchical architecture that uses available sensor information, fault isolation, failure prognosis, system restructuring and controller reconfiguration. A method of fault diagnosis and flight envelop assessment.
Zhang aue21 modeling of sensor faults via reduction of measurement effectiveness 22 modeling of dynamic faults lecture 1 lecture notes on fault tolerant control systems, by y. Actuator fault estimation and reconfiguration control for. The reconfigurable flight control system is capable of not only detecting faults in the system but is also able to adequately compensate for such failures which is more difficult than to only accommodate faults. The fault detection and accommodation techniques required will depend on the type of failure experienced. Joshi, adaptive control of systems with actuator failures. In this paper, a realtime parameter identification method is introduced to analyze the relation of control surface failure and flight envelops, and fault diagnosis is realized for in the flight control systems. Enhanced fault detection and isolation in modern flight actuators.
Isolating incipient sensor faults and system reconfiguration. Sensor fault detection in flight control systems 17. The reconfigurable controller is based on a new algorithm, with two variants aircraft longitudinal and lateral motions, for the calculation of the controller gain matrix without using. Modelbased fault diagnosis has attracted considerable attention from.
Reconfigurable control, fault tolerant control, predictive control, operator splitting, firstorder optimization methods, embedded optimizationbased control, fault detection and reconfiguration, moving horizon estimation, active diagnosis, realtime computation, flight control. Adaptive reconfiguration scheme for flight control systems. This process is experimental and the keywords may be updated as the learning algorithm improves. Airbus efforts towards advanced realtime fault diagnosis. Review on fault detection and fault tolerant control applied. Applied actuator fault accommodation in flight control. This paper describes the design of fault diagnosis and active fault tolerant control schemes that can be developed for nonlinear systems. This paper discusses a generic framework for building fault adaptive control systems using a modelbased approach, with special emphasis on the modeling schemes.
Fault diagnosis and fault tolerance for mechatronic. Direct fault tolerant rlv attitude control a singular. Read ebook fault diagnosis and reconfiguration in flight control systems cooperative systems. A sliding model observerbased fault estimation method is presented by 21 for a class of nonlinear networked control systems with transfer delays. Fault diagnosis and fault tolerant control based on adaptive control approach, 211235. In this study, first a fault detection and isolation fdi based on the fullorder uio structure is presented. Reconfiguration criterion for faulttolerant control. The failure model is build to identify the aerodynamic coefficients by using recursive least squares estimate. The reconfigurable flight control system provides a significant enhancement to flight safety and performance in the event of a. A fault tolerant flight control system for sensor and. Ebook fault diagnosis and reconfiguration in flight control systems. Research and development activities focus on system level fdir of unmanned spacecraft.
Therefore, nowadays, the online fault diagnosis of actuators and accommodation plays a major role in the design of avionic systems. In the simulations, the longitudinal dynamics of an aircraft control system are considered, and control reconfiguration is examined. Integrating model based fault diagnosis with model predictive. Fault diagnosis for flight control systems using subspace method. Fully manual control system a manual flight control system uses a collection of mechanical parts such as. Fault diagnosis and faulttolerant control and guidance for. Fault diagnosis and fault tolerance for mechatronic systems. In this paper,a survey of uav unmanned aerial vehicle sensor fault diagnosis technology is presented.
Control system mechanical engineer system theory fault diagnosis flight control these keywords were added by machine and not by the authors. The fault diagnosis and reconfigurable control methods are illustrated by examples and computer simulations performed via software package matlab. Penati department of electronics, computer sciences and systems, university of bologna, 405 bologna. An intelligent hierarchical approach to actuator fault. The problems of fault detection, isolation, and reconfiguration in flight control systems are considered.
Basic scheme of a fault tolerant control system in advanced fault tolerant control systems, fault diagnosis has become a key issue of the tasks of the supervision level. The subject becomes more interesting since there is an increasing demand for the navigation and control systems of aerospace vehicles, automated actuators etc. This paper studies on intelligent fault diagnosis of terminally guide projectile based on fuzzy theory. Innovation sequence application to aircraft sensor fault detection 226 8. Enhanced fault detection and isolation in modern flight. Proceedings of the 9th ifac symposium advances in control education the international federation of automatic control nizhny novgorod, russia, june 1921, 2012 postgraduate education on fault diagnosis and control reconfiguration in aerospace gianni bertoni, paolo castaldi, maria e. First, a new nonlinear fault diagnosis scheme is used to detect the occurrence of any faults and to determine the particular component that has failed. The safety problem in such systems has always been a special concern. Plug and play fault detection and control reconfiguration for a class of nonlinear largescale constrained systems. Commercial aircraft fault tolerant control ftc strategies in the flight control system fcs are based on failsafe approaches whereby a nominal control law is switched first to a robust solution and then if necessary, to a direct law controlling the actuators surfaces. Fault diagnosis and reconfiguration in flight control. This paper presents a novel intelligent hierarchical approach to automatically detecting, isolating, and accommodating faults in flight control systems.
In this paper we propose a new reconfigurable controller for active fault tolerant control systems with applicability to flight control. Airbus efforts towards advanced realtime fault diagnosis and fault tolerant control. Fault diagnosis for flight control systems using subspace. Journal of institute of control, robotics and systems 15. Types of faults and failures faults in closed loop systems are commonly represented as either actuator, plant or sensor failures refer, fig. The reconfiguration criterion for tolerating actuator fault is proposed. Postgraduate education on fault diagnosis and control. This paper presents a framework for actuator fault accommodation using a multiplemodelbased direct adaptive control approach that does not include explicit fault detection and isolation. Multimodel based adaptive reconfiguration control for flight control systems with actuator faults by y. Boilerturbines are one of the most important parts in power generation plants. Multimodel based adaptive reconfiguration control for.
The fault diagnosis and faulttolerant control technologies of flight control systems have attracted the attention of relevant research 67. It is used when severe faults, such as actuator or sensor outages, cause a breakup of the control loop, which must be restructured to prevent failure at the system level. Research on the fault diagnosis of flight control system. In the paper, the principal block diagram of a fault tolerant aircraft control system is offered.
Fault diagnosis and fault tolerant control and guidance for aerospace demonstrates the attractive potential of recent developments in control for resolving such issues as flight performance, self protection and extendedlife structures. The paper bgm99 describes a systematic computeraided design procedure for failure detection and identification fdi and adaptive reconfigurable control arc for aerospace applications. Fault tolerant control systems concordia university. Fdiftc for aerospace systems fault tolerant reference generation for model predictive control with active diagnosis of elevator jamming faults l. A traditional approach is based on hardware redundancy. Integrated sensoractuator fdi and reconfigurable control. The specific goals of this contract were twofold to assess the applicability of artificial intelligence methods and techniques to aircraft flight control system actuator realtime fault diagnosis and failure management. Stefano riverso, francesca boem, giancarlo ferraritrecate, thomas parisini. The proposed algorithm is satisfying from the simulation results, which widens the research scope of fault tolerant flight control systems. We apply the fault tolerant control system design to a generic aircraft model, and simulate a failed engine. In this paper an approach to fault tolerant flight control system design based on the integration of sensoractuator fault detection and isolation fdi and reconfigurable control is presented. The scheme is demonstrated through simulations applying the flight control system of an aircraft.
Fault diagnosis, failure prognosis and fault tolerant control. Reconfigurable faulttolerant predictive flight control. Game theory and realtime parameter insensitive disturbance attenuating redesign 12 1. Modelbased fault diagnosis has attracted considerable attention from researchers and developers of flight control systems, thanks to its hardware simplicity and costeffectiveness. The proposed architecture has three main components. Hajiyev and caliskan covered the combined fault diagnosis and reconfiguration in flight control systems 1. A desktop environment for assessment of fault diagnosis based. So the proposed criterion provides the possibilities of fault tolerance. Caliskan presented a neural network identification of icing parameters in an a340 aircraft and a reconfiguration technique to keep the aircraft performance close to the performance prior to icing. A ftcs is a control system that possesses the ability to accommodate system component faults failures automatically and is capable of maintaining overall system stability and acceptable performance in the event of such failures. Feb 23, 2016 read ebook fault diagnosis and reconfiguration in flight control systems cooperative systems. Request pdf fault diagnosis and reconfiguration in flight control systems the problem of fault diagnosis and reconfigurable control is a new and actually. Patton cp99, robust modelbased fault diagnosis for dynamic systems, kluwer academic publishers, january 1, 1999, or. These approaches, known as fault tolerant flight control systems ftfcs are able to adapt to such sudden faults while keeping avionics systems.
A decentralized fault tolerant control scheme based on active fault diagnosis. This information is transmitted to the failure management system which determines how to respond appropriately to the failure. Pdf flight control systems download full pdf book download. Pdf reconfiguration of flight control systems for actuator failures. Key technologies in this accommodation of abnormaloffnominal situations are that of onboard fault detection and diagnosis fdd and fault tolerant control ftc. Keviczky 1delft center for systems and control, delft university of technology, delft, the netherlands 2massachusetts institute of technology, cambridge, ma, usa correspondence.
Fault diagnosis and reconfiguration in flight control systems cooperative systems pdf,, download ebookee alternative reliable tips for a better ebook reading. The proposed reconfiguration criterion analyzes the relationship between normal actuators and the system states that are directly affected by faulty actuators. This research was inspired by the intelligent flight control system ifcs flight. Impact of nearcoincident faults on digital flight control systems. Detection and isolation of faults in complex plants is one of. Proceedings australian international aerospace congress. This is natural, because it is known that fault diagnosis process in control systems is considered as a part of general control process. A desktop environment for assessment of fault diagnosis based fault tolerant flight control laws simon hecker, andras varga and gertjan looye abstractwe present a simulation based software environment conceived to allow an easy assessment of fault diagnosis based fault tolerant control techniques. Article information, pdf download for fault diagnosis for flight control systems. Simulation results of kbnnfdindicate that it is better than the model based approach for sensor fault detection. Integrated sensoractuator fdi and reconfigurable control for. Fault diagnosis and failure management background fault diagnosis is the process of determining if a failure has occurred and, if so, what component or subsystem has failed. Review on fault detection and fault tolerant control. Flight testing of the selfrepairing flight control system using the f1 5 highly integrated digital electronic control flight research facility author.
Enhanced fault detection and isolation in modern flight actuators daniel ossmann abstract due to their central location in the control system, actuation systems of primary control surfaces in modern, augmented aircraft must show an increased reliability. Implementation of reconfiguration management in fault. As a result, some existing fault detection methods may not satisfy the need of controller reconfiguration. Helicopter flightcontrol reconfiguration for main rotor. A reconfigurable flight control system fcs is a flight control system that can accommodate the effects of faults by modifying the control system when faults occur during flight. Flighttesting of the selfrepairing flight control system. Cooperative control and fault diagnosis of networked autonomous unmanned systems k.
The failure diagnosis and flight envelop assessment is achieved. Pdf fault diagnosis and reconfiguration in flight control systems cooperative systems download zibarifa. Flight control, reconfiguration, autonomous, fault immune, system reliability abstract the reconfiguration control for the aircraft, 1 introduction which is faced at the critical failure, is very. The current research progress and significant approaches in the field are introduced at home and abroad. Lecture 1 lecture notes on fault tolerant control systems, by y. Flight control reconfiguration of unmanned tiltrotor aircraft iopscience. The logitech g940 flight control system video dailymotion. Modelbased faultadaptive control of complex dynamic.
Application of fuzzy logic in aircraft sensor fault diagnosis. Failure accommodation in digital flight control systems by. Chingiz hajiyev and fikret caliskan, fault diagnosis and reconfiguration in flight control systems, kluwer academic publishers, october 2003, isbn 1402076053. A method of fault diagnosis and flight envelop assessment for. Thats pure, because of it is known that fault evaluation course of in control strategies is taken under consideration as a part of primary control course of. To use some reliability maintenance procedures reduces the number of the catastrophic failures. The scheme utilizes the analytical redundancy that exists in the system between the linear actuator position, motor shaft angular velocity, and motor current for the diagnosis of incipient sensor faults in the system. Keywordsfault diagnosis, fuzzy logic, reconfiguration, observers i. The control reconfiguration procedure is executed by considering the identified control distribution matrix. The reconfigurable flight control system provides a significant enhancement to flight safety and performance in the event of a system fault.
The approach is experimen tally verified at a twodegreesoffreedom helicopter model. These problems are main concerns of the book and are investigated in the following chapters. Controller reconfiguration per fault case that can be used for sensor fault diagnosis and reconfiguration at the same time. Cooperative control and fault diagnosis of networked.
Systems and control laboratory, institute for computer science and control, hungarian academy of sciences, h1111 budapest kende utca. Note that the traditional nonmodelbased fd methods can only cope with the fd problem in. This work presents two active fault tolerant control systems for aerospace applications. Fault diagnosis and reconfigurable control for flight control systems with actuator failures conference paper in proceedings of the ieee conference on decision and control 5. Smart reconfigurable faulttolerant flight control against actuator. Active fault tolerant control of nonlinear systems. Diagnosis and failure management of flight control actuation systems. Moreover, it also provides the required number of redundant normal actuators. New technique for aircraft flight control reconfiguration. Control reconfiguration is an active approach in control theory to achieve faulttolerant control for dynamic systems. Fault symptom of a type of ammunitions flight control system shows fuzzy, and there is no intelligent fault diagnosis method for this control system fault diagnosis.
The methodology is based on a fault detection and diagnosis procedure relying on adaptive filters designed via the nonlinear geometric approach, which allows obtaining the disturbance decoupling property. Fault diagnosis and reconfiguration in flight control systems. The problem of fault diagnosis and reconfigurable control is a new and actually developing field of science and engineering. Fault diagnosis and fault tolerant control strategies for aerospace systems abstract. Feature extraction of the model, decision making and reliability of diagnosis depends on. Fault diagnosis in dynamic systems via state estimation a survey. Fault diagnosis and reconfiguration in flight control systems, kluwer academic publishers, boston, usa 2003. Joshi, adaptive control of systems with actuator failures, springer, april 2, 2004, isbn. Control reconfiguration is an active approach in control theory to achieve fault tolerant control for dynamic systems. Download fault diagnosis and reconfiguration in flight. A survey of fault detection, isolation, and reconfiguration methods.
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