Download Aircraft and rotorcraft system identification : engineering by Mark Tischler, Robert Remple PDF

By Mark Tischler, Robert Remple

Even if many books were written at the thought of approach id, few can be found that supply a whole engineering remedy of approach id and the way to effectively use it on flight autos. This ebook offers the original point of view of over two decades of flight-test functions to either plane and rotorcraft and is a helpful source for college kids, operating engineers, and others drawn to atmospheric flight mechanics, modeling and simulation, and try out and assessment. It offers confirmed equipment, functional instructions, and real-world flight-test effects for a variety of cutting-edge flight cars, from small uncrewed aerial cars (UAVs) to giant manned aircraft/rotorcraft.

Beginning with the elemental recommendations of approach id, every one bankruptcy strains an easy simulation instance and actual flight examples throughout the step by step strategy from instrumentation and knowledge checking to version extraction and version verification. The frequency-response approach, that's exact to this publication, is principally well matched for approach identity of airplane and rotorcraft dynamics versions from flight-test facts. a whole bankruptcy is dedicated to higher-order modeling of helicopters. Many functions are incorporated to illustrate how the goods as a result of procedure 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 options 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 software is illustrated with photographs got from the method identity software program (CIFERÆ) supplied with the ebook. Case stories in response to genuine flight-test initiatives are incorporated to boot! as difficulties for college students to unravel utilizing the supplied CIFERÆ software.

A ideas guide, written through Christina M. Ivler and Mark B. Tischler is out there from the writer.

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Benefits derived from applying these techniques include the reduction of flight-test time required for control-system optimization and handling-qualities evaluation, especially for complex controllaw architectures, as well as improvements in the final system performance. Frequency-domain methods offer a transparent understanding of component and end-to-end response characteristics that can be critical in solving system integration problems encountered in flight test. The Army/NASA Rotorcraft Division (Ames Research Center) jointly developed the Comprehensive Identification from Frequency Responses (CIFER®; Ref.

When incorporated into a simulation, the model is expected to predict the aircraft dynamic response that results from given control inputs. 2 Model 7 Models of rotary-wing aircraft dynamics Applications/examples in book (*) DOF Assumptions Hybrid fully coupled 13 DOF: Coupled fuselage/ regressive-flap dynamics (eight DOF) Coupled coninginflow dynamics (two DOF) Lead-lag dynamics (two DOF) Engine torque response (one DOF) Short-term regressive flap/coning/inflow dynamics are modeled using first-principles physics equations.

Doublets, 3-2-1-1) involving shorter record lengths Parameter accuracy bounds Accurate estimates Very optimistic estimates (factor of 5–10) documenting system performance and solving problems that might appear in the later phases of development. The availability of comprehensive and reliable computational tools has substantially enhanced the acceptability of frequency-domain techniques in the flight-control and flight-test communities. Benefits derived from applying these techniques include the reduction of flight-test time required for control-system optimization and handling-qualities evaluation, especially for complex controllaw architectures, as well as improvements in the final system performance.

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