Damage-mitigating control of mechanical structures: Experimental verification of the concept

S. Tangirala, A. Ray, M. Carpino

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

The concept of damage-mitigating control is built upon the two disciplines of systems science and the mechanics of materials, and its goal is to achieve an optimized trade-off between the dynamic performance and structural durability of the plant under control. Simulation studies reported in recent publications show a substantial reduction of damage accumulation in the critical components of a rocket engine with no significant loss of performance. This paper reports an experimental verification of the damage-mitigating control concept on a laboratory testbed, which is a two-degree-of-freedom mechanical system excited by a computer-controlled shaker table. Test results demonstrate: (i) the important feature of optimized damage-mitigating control by extending the fatigue life up to 3 1/2 times with no significant performance degradation; and (ii) close agreement between the analytical prediction of damage and the experimental observations.

Original languageEnglish (US)
Article number011
Pages (from-to)139-146
Number of pages8
JournalSmart Materials and Structures
Volume4
Issue number2
DOIs
StatePublished - Dec 1 1995

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Civil and Structural Engineering
  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Electrical and Electronic Engineering

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