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“Ride control of surface effect ships using distributed control”

Authors: Asgeir J. Sørensen and Olav Egeland,
Affiliation: ABB and NTNU, Department of Engineering Cybernetics
Reference: 1994, Vol 15, No 2, pp. 65-79.

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Keywords: SES, acoustic, ride control, passivity, full scale results

Abstract: A ride control system for active damping of heave and pitch accelerations of Surface Effect Ships (SES) is presented. It is demonstrated that distributed effects that are due to a spatially varying pressure in the air cushion result in significant vertical vibrations in low and moderate sea states. In order to achieve a high quality human comfort and crew workability it is necessary to reduce these vibrations using a control system which accounts for distributed effects due to spatial pressure variations in the air cushion. A mathematical model of the process is presented, and collocated sensor and actuator pairs are used. The process stability is ensured using a controller with appropriate passivity properties. Sensor and actuator location is also discussed. The performance of the ride control system is shown by power spectra of the vertical accelerations obtained from full scale experiments with a 35 m SES.

PDF PDF (1559 Kb)        DOI: 10.4173/mic.1994.2.1





References:
[1] BALAS, M. (1978). Feedback control of flexible systems, IEEE Trans. of Automatic Control, 23, 673-679 doi:10.1109/TAC.1978.1101798
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[3] FALTINSEN, O.M. (1990). Sea Loads on Ships and Offshore Structures, Cambridge University Press.
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[6] KAPLAN, P. DAVIS, S. (1974). A simplified Representation of the Vertical Plane Dynamics of SES Craft, AIAA Paper N. 74-314. AIAA/SNAME Advanced Marine Vehicles Conference, San Diego, California.
[7] KAPLAN, P. DAVIS, S. (1978). System Analysis Techniques for Designing Ride Control System for SES craft in Waves, 5th Ship Control System Symposium, Annapolis, MD.United States Naval Academy, Annapolis.
[8] KAPLAN, P., BENTSON, J., DAVIS, S. (1981). Dynamics and hydrodynamics of surface effect ships, Trans. SNAME, 89, 211-247.
[9] SALVESEN, N., TUCK, E.O., FALTINSEN, O.M. (1970). Ship motions and sea loads, Trans. SNAME, 78, 345-356.
[10] STEEN, S. (1993). Cobblestone Effect on SES, Dr. ing. Thesis, Depart. of Marine Hydrodynamics, The Norwegian Institute of Technology, Trondheim, Norway.
[11] SØRENSEN, A.J. (1993). Modelling and Control of SES Dynamics in the Vertical Plane, Dr. ing. Thesis, Department of Engineering Cybernetics, the Norwegian Institute of Technology.
[12] SØRENSEN, A.J., STEEN, S. FALTINSEN, O.M., (1992). Cobblestone Effect on SES, High Performance Marine Vehicle Conference- HPMV92, ASNE, Washington D.C.
[13] SØRENSEN, A.J., STEEN, S., FALTINSEN, O.M. (1993). SES dynamics in the vertical plane, Journal of Ship Technology Research, 40, 71-94.
[14] VIDYASAGAR, M. (1993). Nonlinear System Analysis, Second Edition.Prentice Hall, Englewood Cliffs, NJ.


BibTeX:
@article{MIC-1994-2-1,
  title={{Ride control of surface effect ships using distributed control}},
  author={Sørensen, Asgeir J. and Egeland, Olav},
  journal={Modeling, Identification and Control},
  volume={15},
  number={2},
  pages={65--79},
  year={1994},
  doi={10.4173/mic.1994.2.1},
  publisher={Norwegian Society of Automatic Control}
};

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