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AGARD Flight Test Techniques Series. Volume 3. Identification of Dynamic Systems-Applications to Aircraft. Part 2. Nonlinear Analysis and Manoeuvre Design. (L'Identification des Systemes Dynamiques-Applications aux Aeronefs Titre 2; L'analyse non-lineaire et la Conception de la Manoeuvre)
ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT NEUILLY-SUR-SEINE (FRANCE)
Pagination or Media Count:
This AGARDograph is a sequel to the previous AGARDographs published in the AGARD Flight Test Techniques Series, Volume 2 on Identification of Dynamic Systems and Volume 3 on Identification of Dynamic Systems - Applications to Aircraft - Part 1 The Output Error Approach both written by R.E. Maine and K.W. Iliff. The intention of the present document is to cover some of those areas which were either absent or only briefly mentioned in these volumes. These areas are Flight Path Reconstruction, Nonlinear Model Identification, Optimal Input Design and Flight Test Instrumentation. The present approach to identification is rather different from that presented in the earlier AGARDographs in the sense that the identification problem is decomposed into a state estimation and a parameter identification part. This approach is referred to as the Two-Step Method TSM, although one will find other names like Estimation Before Modelling EBM in the literature. It will be shown in the present AGARDograph that this approach has significant practical advantages over methods which no attempt is made to decompose the joint parameter- state estimation problem. The two-step method is generally applicable to flight vehicles such as fixed wing aircraft and rotorcraft which are equipped with state of the art inertial reference systems. The theoretical developments in the present AGARDograph will be illustrated with examples of a flight test program with the De Havilland DHC-2 Beaver aircraft, the experimental aircraft of the Delft University of Technology which has been used for almost two decades to test new ideas in the science of aircraft parameter identification.
APPROVED FOR PUBLIC RELEASE