APPLICATION OF MODELLING AND ORDER REDUCTION IN AIRCRAFT INSTRUMENTATION SYSTEM

Abstract

Measured engine speed regulation and synchronization of various engines used in multi-engined aircraft is discussed. Designing the PID controller for engine speed regulation to attain the satisfactory transient response, which results in matching the dynamic behaviour of speed regulation of non-identical engines which has slight, changes in parameter used in multi-engine aircraft. Thus for synchronization to achieve the same steady state value. Reduced order model of high order (i.e. Aircraft Blind Landing) linear system is obtained by marshall method and predicting the transient response sensitivity using reduced order model of Aircraft Blind landing system. A new low order model i.e. marshall method with equivalent lag is introduced and when compared with the exact response, it is found to give an encouraging accuracy of prediction.