Skip to main content
Log in

A study of the feasibility of active shock isolation

  • Published:
Ingenieur-Archiv Aims and scope Submit manuscript

Übersicht

In der vorliegenden Arbeit werden Brauchbarkeit und Zweckmäßigkeit einer aktiven Stoßdämpfung untersucht. Während die üblichen Dämpfer meist nicht-regelbare, passive Dämpfungsglieder besitzen, soll hier untersucht werden, ob die Verwendung zusätzlicher aktiver, servogesteuerter Dämpfungsglieder Vorteile bringt. In der Praxis ist die Eingangsfunktion bei Erregungsbeginn nicht bekannt. Hier soll jedoch die Eingangsfunktion bei Erregungsbeginn als bekannt angenommen werden. Der Dämpfer besitze einen Freiheitsgrad. Es soll die optimale Arbeitsweise des aktiven Stoßdämpfers gesucht und mit einer optimal abgestimmten passiven Anlage verglichen werden. Als Maß für die Wirksamkeit des Dämpfers wird das Verhältnis der maximalen absoluten Beschleunigung der Schwingermasse zur maximalen Erregerbeschleunigung betrachtet. Zwei numerische Verfahren, dynamisches und lineares Programmieren, werden zur Lösung verwendet und ihre Vor- und Nachteile diskutiert.

Summary

The subject matter of this paper is a pilot study of the feasibility of active shock isolation. Whereas conventional shock isolation systems use passive elements such as springs and dashpots, this study is concerned with investigating the advantages of using active elements, e. g., servo or force generators, in addition to passive elements. In actuality the excitation function of the isolating system is not known. The case considered here is a one-degree-of-freedom system, where the complete input is known, and the objective is to find a control to optimize the active isolator performance and compare it with an optimally tuned linear passive isolator. The maesure of performance is the ratio of the magnitudes of the maximum absolute acceleration of the protected equipment to the maximum acceleration of the shock-excited environment. Two numerical methods of solution, dynamic and linear programming, are considered and their relative merits assessed.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

References

  1. H. W. Kriebel, A Study of the Practicality of Active Shock Isolation, Dissertation, Stanford University, Division of Eng. Mech., May 1966.

  2. L. S. Pontryagin, V. G. Boltyanskii, R. V. Gamkrelidze and E. F. Mishchenko, The Mathematical Theory of Optimal Processess, (Translation from the Russian), New York 1962.

  3. R. Bellman, Adaptive Control Processes — A guided Tour, Princeton, N.J., 1961.

  4. R. Bellman und S. E. Dreyfus, Applied Dynamic Programming, Princeton, N.J., 1962.

  5. J. E. Gibson, Proceedings of Dynamic Programming Workshop, Conference sponsored by Nonlinear Theory Subcommittee, Feedback-Control Committee, AIEE, Boulder, Colorado, Purdue University. June 1961.

  6. G. Hadley, Linear Programming, Reading, Mass., 1962.

  7. E. A. Coddington and N. Levinson, Theory of Ordinary Differential Equations, New York 1965.

  8. L. A. Zadeh and C. A. Desoer, Linear Systems Theory — The State Space Approach, New York 1963.

  9. G. N. Bycroft, Response of Single-Degree-Of-Freedom, Bilinear and Hysteretic Systems to Typical Ground Shock Wave Forms, Chapter 3.7 in Air Force Special Weapons Center Technical Documentary Report, AFSWC-TDR-62-64, December 1962.

Download references

Author information

Authors and Affiliations

Authors

Additional information

Abbreviated version of a Ph. D. thesis from a research project directed by Prof. I. Fluegge-Lotz in the Division of Engineering Mechanics, Stanford, University, Stanford, California, U.S.A. A microfilm copy of the dissertation is obtainable from the University of Michigan, Ann Arbor, Michigan.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Kriebel, H. A study of the feasibility of active shock isolation. Ing. arch 36, 371–380 (1968). https://doi.org/10.1007/BF00532182

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00532182

Keywords

Navigation