By Mark B. Tischler
Providing confirmed tools, sensible directions, and real-world flight-test effects for a variety of state of the art flight autos, "Aircraft and Rotorcraft process identity, moment variation" addresses the complete technique of plane and rotorcraft process id from instrumentation and flight trying out to version choice, validation, and alertness of the consequences. during this hugely expected moment variation, authors Tischler and Remple have additional committed in-depth chapters proposing prolonged version constructions and id effects for big versatile shipping plane, and the distinctive method to advance a continuing complete flight envelope simulation version from person procedure identity versions and trim attempt facts. themes mentioned contain: Frequency-response equipment which are in particular well matched for approach id of flight motor vehicle types from flight-test info; particular directions for flight checking out, facts research, and the right kind choice of version constitution complexity; and emphasis at the significance of actual perception in version improvement and functions. certain gains: scholar model of CIFER[registered] with up to date graphical consumer interface utilizing MATLAB[registered]; various flight-test effects for either manned and unmanned cars illustrating the wide-ranging roles of approach identity, together with the research of flight mechanics, suggestions keep an eye on, dealing with features, subsystem dynamics, structural research, higher-order versions for airplane and rotorcraft, and simulation; and, huge challenge units on the finish of every bankruptcy, with many routines according to flight-test facts supplied for the XV-15 in hover and cruise giving the reader hands-on real-world event with process identity tools and interpretation of the consequences.
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Extra info for Aircraft and Rotorcraft System Identification
There is strong coupling between the dynamics of the rotor blades and the dynamics of the air flow passing through the rotor (injow) with those of the fuselage, control system, and engine, so that as many iis 13 degrees of freedom (or even more) are often necessary to model the dynamic response accurately. The planar symmetry of a fixedwing aircraft also leads to considerable simplification of system-identification model structures, decoupling into a three-DOF model for the longitudinal dynamics and a separate three-DOF model for lateral/directional dynamic characteristics.
Thanks go to Thomas J. Esposito for his care in preparing all of the final graphics material. Special thanks go to Jeffery A. Theodore for their help in proofing the final galleys. Thanks again from both of us to everyone that helped and encouraged us in this project. The second author expresses deep gratitude to a number of people who were critical to his successful participation in writing this book. Management support from the University of California at Santa Cruz and Ames Research Center, especially Bassam Musaffar and Larry Hogle, created ideal conditions for working on the book while balancing the scheduling demands of other important projects.
Finally, the second author wishes to thank his wife, Evelynn Brown Remple, and their son, Jonathan Remple, for the support, encouragement, and understanding that he received from them while working on this book. They both tolerated with good spirits the long hours of work and the stacks of papers that sometimes intruded on the family's time and space. Mark B. Tischler Robert K. Rernple December 2005 1 Introduction and Brief History of System Identification in the Frequency Domain This chapter presents both a general introduction to system identification and a brief history of the development of frequency-domain-based methods.