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

Hui Zhang, Asok Ray, Ravindra Patankar

    Research output: Contribution to journalArticle

    5 Scopus citations


    The goal of damage-mitigating control is to enhance structural durability of mechanical systems (e.g., advanced aircraft, spacecraft, and power plants) 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. A feedforward sequence of limited overload pulses and a 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)336-342
    Number of pages7
    JournalJournal of Dynamic Systems, Measurement and Control, Transactions of the ASME
    Issue number2
    StatePublished - Jan 1 2000

    All Science Journal Classification (ASJC) codes

    • Control and Systems Engineering
    • Information Systems
    • Instrumentation
    • Mechanical Engineering
    • Computer Science Applications

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