Damage-mitigating control with overload injection: Experimental validation of the concept

Hui Zhang, Asok Ray, Ravindra Patankar

Research output: Contribution to journalConference article

3 Citations (Scopus)

Abstract

The goal of damage-mitigating control is to enhance structural durability of operating machinery while retaining high performance. So far the reported work in damage-mitigating control has focused on reduction of peak stresses to increase structural durability. This paper presents a novel concept that takes advantage of the physical phenomenon of fatigue crack retardation. Overload pulses are intermittently injected into the plant as a feedforward signal through the actuator(s) in addition to robust feedback control. The feedforward sequence of overload pulses and the robust feedback control law are designed based on state-space models of fatigue-crack damage and plant dynamics. A series of experiments have been conducted on a laboratory test apparatus to demonstrate feasibility of the overload injection concept for robust damage-mitigating control.

Original languageEnglish (US)
Pages (from-to)1188-1192
Number of pages5
JournalProceedings of the American Control Conference
Volume2
StatePublished - Dec 1 1999
EventProceedings of the 1999 American Control Conference (99ACC) - San Diego, CA, USA
Duration: Jun 2 1999Jun 4 1999

Fingerprint

Robust control
Feedback control
Durability
Machinery
Actuators
Experiments
Fatigue cracks

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Cite this

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abstract = "The goal of damage-mitigating control is to enhance structural durability of operating machinery while retaining high performance. So far the reported work in damage-mitigating control has focused on reduction of peak stresses to increase structural durability. This paper presents a novel concept that takes advantage of the physical phenomenon of fatigue crack retardation. Overload pulses are intermittently injected into the plant as a feedforward signal through the actuator(s) in addition to robust feedback control. The feedforward sequence of overload pulses and the robust feedback control law are designed based on state-space models of fatigue-crack damage and plant dynamics. A series of experiments have been conducted on a laboratory test apparatus to demonstrate feasibility of the overload injection concept for robust damage-mitigating control.",
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Damage-mitigating control with overload injection : Experimental validation of the concept. / Zhang, Hui; Ray, Asok; Patankar, Ravindra.

In: Proceedings of the American Control Conference, Vol. 2, 01.12.1999, p. 1188-1192.

Research output: Contribution to journalConference article

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AU - Ray, Asok

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AB - The goal of damage-mitigating control is to enhance structural durability of operating machinery while retaining high performance. So far the reported work in damage-mitigating control has focused on reduction of peak stresses to increase structural durability. This paper presents a novel concept that takes advantage of the physical phenomenon of fatigue crack retardation. Overload pulses are intermittently injected into the plant as a feedforward signal through the actuator(s) in addition to robust feedback control. The feedforward sequence of overload pulses and the robust feedback control law are designed based on state-space models of fatigue-crack damage and plant dynamics. A series of experiments have been conducted on a laboratory test apparatus to demonstrate feasibility of the overload injection concept for robust damage-mitigating control.

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