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Design of digital flight-mode control systems for helicopters with non-linear actuators

Published online by Cambridge University Press:  04 July 2016

B. Porter
B. Porter*
Affiliation:
Department of Aeronautical and Mechanical Engineering, University of Salford
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Summary

The synthesis of discrete-time tracking systems incorporating Lur’e plants with multiple non-linearities is illustrated by the design of a fast-sampling digital controller and associated transducers for the automatic control of the longitudinal motions of the CH-47 helicopter with both gang-collective and differential-collective non-linearities. In particular, it is demonstrated that non-interacting control of the vertical velocity and pitch attitude of the helicopter is readily achievable for large classes of non-linear actuator characteristics such as ‘deadzone’ provided that the controller and transducer parameters are chosen so as to ensure that state-bounded absolutely stable tracking occurs.

Information

Type
Research Article
Information
The Aeronautical Journal , Volume 89 , Issue 886 , July 1985, pp. 213 - 218
Copyright
Copyright © Royal Aeronautical Society 1985 

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References

1. Porter, B. Design of high-performance tracking systems, Technical Report AFWAL-TR-82-3032, US Air Force Wright Aeronautical Laboratories, Wright-Patterson AFB, Ohio, USA, July 1982.Google Scholar
2. Porter, B. Design of direct digital flight control systems for helicopters, Proc 26th Israel Annual Conference on Aviation and Astronautics, Tel-Aviv/Haifa, Israel, February 1984.Google Scholar
3. Porter, B. Design of tracking systems incorporating inner-loop compensators and fast-sampling error-actuated controllers for Lur’e plants with multiple non-linearities, Report USAME/DC/ 124/83, University of Salford, 1983.Google Scholar
4. Grujic, Lj T. and Porter, B. Discrete-time tracking systems incorporating Lur’e plants with multiple non-linearities, Int J Systems Sci, 1980, 11, 1505–1520.Google Scholar
5. Porter, B. Computation of the zeros of linear multivariable systems, Int J Systems Sci, 1979, 10, 1427–1432.Google Scholar
6. Stein, G. and Doyle, J. C. Singular values and feedback: design examples, Proc 16th Allerton Conference on Communication, Control, and Computing, Urbana, USA, October 1978.Google Scholar
7. Doyle, J. C. and Stein, G. Multivariable feedback design: concepts for a classical/modern synthesis, IEEE Trans Automatic Control, 1981, AC-26, 4–16.Google Scholar