By Mark Tischler, Robert Remple
Even though many books were written at the conception of approach identity, few can be found that offer an entire engineering therapy of approach id and the way to effectively use it on flight automobiles. This e-book offers the original viewpoint of over two decades of flight-test purposes to either plane and rotorcraft and is a beneficial source for college kids, operating engineers, and others attracted to atmospheric flight mechanics, modeling and simulation, and try and overview. It offers confirmed tools, sensible guidance, and real-world flight-test effects for a variety of state of the art flight automobiles, from small uncrewed aerial autos (UAVs) to massive manned aircraft/rotorcraft.
Beginning with the fundamental thoughts of procedure id, each one bankruptcy lines an easy simulation instance and actual flight examples during the step by step method from instrumentation and knowledge checking to version extraction and version verification. The frequency-response process, that's precise to this publication, is mainly compatible for process id of airplane and rotorcraft dynamics types from flight-test facts. a whole bankruptcy is dedicated to higher-order modeling of helicopters. Many functions are incorporated to illustrate how the goods due to procedure id are used. particular functions contain flight mechanics and handling-qualities analyses, balance margin selection, structural mode selection, and simulation version constancy assessment.
The ebook assumes wisdom of the elemental ideas of aeronautics, Laplace transforms, and flight dynamics and classical keep an eye on. Emphasis is put on engineering tools and interpretation of flight-test effects and every key process or research program is illustrated with snap shots acquired from the approach identity software program (CIFERÆ) supplied with the publication. Case reviews in line with actual flight-test tasks are integrated to boot! as difficulties for college kids to unravel utilizing the supplied CIFERÆ software.
A recommendations guide, written by way of Christina M. Ivler and Mark B. Tischler is offered from the writer.
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Additional resources for Aircraft and rotorcraft system identification : engineering methods with flight-test examples
Frequency-response method of system identification Starts by identifying a nonparametric model (a frequency response or a matrix of frequency responses) Uses the information obtained from the nonparametric models as the basis for identifying parametric models (either a transfer-function model or a state-space model) Applications include Handling-qualities analysis in terms of the bandwidth and phase-delay parameters Pilot-in-the-loop analysis Stability margin determination Classical control system design Validation and tuning of physics-based simulation models.
Models might be desired to characterize the aircraft dynamics as a whole or to characterize an aircraft subsystem, such as an actuator, rotor system, or the engine. Key applications of aircraft system-identification results include piloted simulation models, comparison of wind-tunnel vs flight measurements, validation and improvement of physics-based simulation models, flight-control system development and validation, and handling-qualities specification compliance testing. As indicated by the title, this book addresses the system identification of both aircraft and rotorcraft, focusing on engineering methods and flight-test examples.
3) What is the proper structure of the equations of motion? 4) What are good initial guesses for identification parameters? For new or unconventional aircraft configurations, there might not be a good basis for making these modeling assumptions at the start of system identification. But once a model structure is known, what remains is to determine the values of the unknown coefficients in the model equations. 6 Nonparametric system-identification modeling provides excellent insight into the key aspects of the aircraft dynamics before moving on to the more complex parametric modeling stage.