Fault Diagnosis and Reconfiguration in Flight Control by C. Hajiyev, F. Caliskan
By C. Hajiyev, F. Caliskan
The challenge of fault prognosis and reconfigurable regulate is a brand new and truly constructing box of technological know-how and engineering. the topic turns into extra fascinating for the reason that there's an expanding call for for the navigation and keep an eye on platforms of aerospace cars, computerized actuators and so forth. to be extra secure and trustworthy. these days, the issues of fault detection and isolation and reconfigurable keep watch over allure the eye the scientists on the earth. the topic is emphasised within the fresh foreign congresses akin to IF AC global Congresses (San Francisco-1996, Beijing-1999, and Barcelona-2002) and lMEKO international Congresses (Tampere-1997, Osaka-1999, Vienna-2000), and in addition within the overseas meetings on fault analysis equivalent to SAFEPROCESS meetings (Hull-1997, Budapest-2000). The provided equipment within the publication are in accordance with linear and nonlinear dynamic mathematical versions of the structures. Technical items and platforms said by way of those versions are very huge, and comprise numerous regulate structures, actuators, sensors, desktops, communique structures, and mechanical, hydraulic, pneumatic, electric and digital units. The analytical fault prognosis options of those items were constructed for numerous many years. lots of these suggestions are in response to using the result of modem regulate idea. this is often average, since it is understood that fault analysis approach up to speed structures is taken into account as part of normal keep watch over procedure. xxii In association of fault analysis of keep an eye on structures, using the recommendations and strategies of modem keep watch over concept together with recommendations of kingdom area, modeling, controllability, observability, estimation, id, and filtering is particularly efficient.
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Extra info for Fault Diagnosis and Reconfiguration in Flight Control Systems
In fault masking techniques all the instruments used are physical ones. Whereas in analytical redundancy, analytical reconstructions of the outputs are compared with physical outputs of sensors. KaIman filters, for example, can be used for a such comparison. U sing KaIman filters and other existing subsystems, a redundancy logic can be established. The appeal of the analytical redundancy approach is that it does not need additional physical instrumentation in the plant. However, there is a price to pay for this benefit which arises from the need of mathematical model.
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Online design of control laws and control filters is done based on the identified system model using methods used for computer aided offline design provided these methods CH. HAJIYEV AND F. CALISKAN 15 can meet the real-time constraints. Sophisticated design techniques such as Linear Quadratic Gaussian (LQG) techniques coupled with Loop Transfer Recovery (LTR) concept, and H", based controller synthesis have evolved for dealing with plant uncertainties and disturbance rejection. In the case when the parameters identified are specified as stochastic variables several methods have been proposed and shown to give acceptable results.