Performance metrics for tiltrotor flight dynamics during the transition regime
Sunkara, Vishwamithra Reddy
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Vishwamithra Sunkara, Wilfred Nobleheart, and Animesh Chakravarthy. "Performance Metrics for Tiltrotor Flight Dynamics During the Transition Regime", Journal of Guidance, Control, and Dynamics, Vol. 37, No. 6 (2014), pp. 2039-2044
For control system design purposes, desirable locations of short period and phugoid poles with their respective damping factors and natural frequencies are specified for fixed-wing aircraft in U.S. Department of Defense military specifications (MIL-SPEC) documents [1,2] and for heliocopters in aeronautical design standard (ADS)/MIL-SPEC documents [3-5]. In both cases, the control system designers can verify and demonstrate the validity of their design, in part by analytically verifying that the closed-loop system, when linearized about different trim conditions, possesses damping factors and natural frequencies that satisfy these requirements.
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