Get Aircraft and rotorcraft system identification : engineering PDF

By Mark Tischler, Robert Remple

Even though many books were written at the thought of process id, few can be found that offer an entire engineering therapy of method id and the way to effectively use it on flight automobiles. This publication presents the original point of view of over two decades of flight-test purposes to either plane and rotorcraft and is a useful source for college kids, operating engineers, and others attracted to atmospheric flight mechanics, modeling and simulation, and try and assessment. It provides confirmed equipment, sensible instructions, and real-world flight-test effects for a variety of cutting-edge flight autos, from small uncrewed aerial cars (UAVs) to giant manned aircraft/rotorcraft.

Beginning with the elemental thoughts of procedure identity, every one bankruptcy strains an easy simulation instance and actual flight examples throughout the step by step procedure from instrumentation and information checking to version extraction and version verification. The frequency-response process, that's specified to this e-book, is principally compatible for approach id of plane and rotorcraft dynamics versions from flight-test information. an entire bankruptcy is dedicated to higher-order modeling of helicopters. Many purposes are incorporated to illustrate how the goods as a result of method id are used. particular functions comprise flight mechanics and handling-qualities analyses, balance margin selection, structural mode selection, and simulation version constancy assessment.

The booklet assumes wisdom of the fundamental innovations of aeronautics, Laplace transforms, and flight dynamics and classical keep an eye on. Emphasis is put on engineering equipment and interpretation of flight-test effects and every key strategy or research program is illustrated with pics acquired from the process identity software program (CIFERÆ) supplied with the e-book. Case stories in response to genuine flight-test initiatives are incorporated to boot! as difficulties for college kids to resolve utilizing the supplied CIFERÆ software.

A options guide, written by way of Christina M. Ivler and Mark B. Tischler is out there from the writer.

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Extra resources for Aircraft and rotorcraft system identification : engineering methods with flight-test examples

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Most of the examples in the book, however, are based on flight-test results because it is the authors’ experience that many methods and guidelines which work well using simulated data break down for real flight-test applications. Flight-test results for the XV-15 tilt-rotor aircraft are used to illustrate the methods in each chapter, thereby providing a consistent example from the start to the finish of the system-identification road map. The results for the XV-15 in forward flight illustrate typical results for an aircraft configuration, whereas the results for the same vehicle in hovering flight illustrate typical results for a helicopter configuration.

These models are explained in greater detail in the context of various examples throughout this book. 2 Relationship Between Simulation and System Identification In contrast to system-identification-based modeling, the simulation-based approach to aircraft modeling involves adopting many a priori assumptions about the vehicle characteristics. The model is typically built up from aerodynamic, inertial and structural characterizations of the aircraft’s individual component elements, such as the wing, tail, fuselage, rotor, etc.

These transfer-function models provide the key dynamic modes and control sensitivities. Transfer-function models of the bare-airframe response can be used directly for control system synthesis based on root-locus techniques, whereas equivalent system models of the closed-loop response with the automatic flight-control system (AFCS) active are widely used for handling-qualities analyses. In some applications, it might be necessary to proceed to the ultimate identification step of extracting a state-space description in terms of identified stability and control derivatives.

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Aircraft and rotorcraft system identification : engineering methods with flight-test examples by Mark Tischler, Robert Remple

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