Read e-book online Aircraft and rotorcraft system identification : engineering PDF

By Mark Tischler, Robert Remple

Even though many books were written at the conception of procedure identity, few can be found that offer a whole engineering therapy of approach identity and the way to effectively use it on flight cars. This e-book offers the original standpoint of over two decades of flight-test functions to either plane and rotorcraft and is a invaluable source for college kids, operating engineers, and others attracted to atmospheric flight mechanics, modeling and simulation, and attempt and assessment. It provides confirmed tools, sensible directions, and real-world flight-test effects for quite a lot of cutting-edge flight automobiles, from small uncrewed aerial automobiles (UAVs) to massive manned aircraft/rotorcraft.

Beginning with the elemental techniques of method id, each one bankruptcy lines 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 technique, that's detailed to this ebook, is principally well matched for method id of plane and rotorcraft dynamics types from flight-test information. a whole bankruptcy is dedicated to higher-order modeling of helicopters. Many purposes are integrated to illustrate how the goods because of method identity are used. particular functions comprise flight mechanics and handling-qualities analyses, balance margin choice, structural mode decision, and simulation version constancy assessment.

The ebook assumes wisdom of the elemental thoughts of aeronautics, Laplace transforms, and flight dynamics and classical keep watch over. Emphasis is put on engineering tools and interpretation of flight-test effects and every key technique or research software is illustrated with photographs bought from the method id software program (CIFERÆ) supplied with the publication. Case stories in accordance with genuine flight-test tasks are integrated in addition! as difficulties for college students to unravel utilizing the supplied CIFERÆ software.

A ideas handbook, written through Christina M. Ivler and Mark B. Tischler is on the market from the writer.

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Additional info for Aircraft and rotorcraft system identification : engineering methods with flight-test examples

Sample text

System identification and simulation modeling can be seen as inverse procedures, as shown in Fig. 6. In system identification the aircraft response is measured, and a dynamic model is extracted from the data, the reverse of developing a simulation. This extracted model can be compared directly with the simulation model, thereby providing greatly increased physical understanding about the nature of the characteristics of the physical systems that are being modeled. One role of system identification is to quantify where the actual and predicted motions do not match and to provide information on proper tuning for improved prediction accuracy.

S. S. and international industry and research colleagues. The support and encouragement of the AFDD Director, Andrew W. Kerr, and the Chief of the AFDD Flight Control and Cockpit Integration Branch, Barry R. Lakinsmith, has made possible the long-term pursuit of this research topic. Their support and encouragement for writing this book is also greatly appreciated. M. Leung, Mavis G. Cauffman, Gary L. Villere, Lawrence E. Pierce, Dexter L. Hermstad, and Paul S. Salchak. A special thanks go to my father, Morris Tischler, for his lifelong encouragement and for being my greatest fan.

System-identification projects have ranged from small (9-in. diam) ducted-fan unmanned air vehicles (UAVs) to large (100-ft wing span) solar-powered UAVs, including a wide range of manned fixed-wing aircraft and rotary-wing aircraft (rotorcraft) configurations. , actuators and other flight control components). Examples are given in the overview of Sec. 4 and throughout the book. The identification of dynamics models of flight vehicles from flight-test data is made difficult by many factors, as explained in this book.

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