On the stability of the damped hill’s equation with arbitrary, bounded parametric excitation

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The minimum damping for asymptotic stability is predicted for Hill’s equation with any bounded parametric excitation. It is shown that the response of Hill’s equation with bounded parametric excitation is exponentially bounded. The parametric excitation maximizing the bounding exponent is identified by time optimal control theory. This maximal bounding exponent is balanced by viscous damping to ensure asymptotic stability. The minimum damping ratio is calculated as a function of the excitation bound. A closed form, more conservative estimate of the minimum damping ratio is also predicted. Thus, if the general (e.g., unknown, aperiodic, orrandom) parametric excitation of Hill’s equation is bounded, a simple, conservative estimate of the damping required for asymptotic stability is given in this paper.

Original languageEnglish (US)
Pages (from-to)366-370
Number of pages5
JournalJournal of Applied Mechanics, Transactions ASME
Volume60
Issue number2
DOIs
StatePublished - Jan 1 1993

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Damping
Asymptotic stability
damping
excitation
time optimal control
exponents
viscous damping
control theory
estimates
Control theory

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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On the stability of the damped hill’s equation with arbitrary, bounded parametric excitation. / Rahn, Christopher D.; Mote, C. D.

In: Journal of Applied Mechanics, Transactions ASME, Vol. 60, No. 2, 01.01.1993, p. 366-370.

Research output: Contribution to journalArticle

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AB - The minimum damping for asymptotic stability is predicted for Hill’s equation with any bounded parametric excitation. It is shown that the response of Hill’s equation with bounded parametric excitation is exponentially bounded. The parametric excitation maximizing the bounding exponent is identified by time optimal control theory. This maximal bounding exponent is balanced by viscous damping to ensure asymptotic stability. The minimum damping ratio is calculated as a function of the excitation bound. A closed form, more conservative estimate of the minimum damping ratio is also predicted. Thus, if the general (e.g., unknown, aperiodic, orrandom) parametric excitation of Hill’s equation is bounded, a simple, conservative estimate of the damping required for asymptotic stability is given in this paper.

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