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. [S0022-0434(00)01302-2]
Damage-Mitigating Control With Overload Injection: Experimental Validation of the Concept1
Contributed by the Dynamic Systems and Control Division for publication in the JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT, AND CONTROL. Manuscript received by the Dynamic Systems and Control Division December 2, 1998. Associate Technical Editor: S. D. Fassois.
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Zhang, H., Ray, A., and Patankar, R. (December 2, 1998). "Damage-Mitigating Control With Overload Injection: Experimental Validation of the Concept." ASME. J. Dyn. Sys., Meas., Control. June 2000; 122(2): 336–342. https://doi.org/10.1115/1.482460
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