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Optimal Active Twist Input Scenario for Rotor Performance Improvement and Vibration Reduction

Autor(en): Y.H. You, M.K. Dhadwal, S.N. Jung
Zusammenfassung: In this paper, the best actuation scenario is sought using a multitude of active twist control inputs taking advantage of a global search algorithm to improve performance and reduce vibration of a helicopter rotor. The active twist schemes include a single harmonic, multiple harmonic, and three other segmented non-harmonic actuation cases. An advanced particle swarm assisted genetic algorithm (PSGA) is employed for the optimizer. In addition, a comprehensive rotorcraft analysis code CAMRAD II is used to reach the trim and to predict the rotor power and hub vibratory loads. A scale-down BO-105 model is used for the reference rotor and the actuator material is assumed to be embedded in the blade structure. The numerical simulation is carried out for low speed descent and high speed forward flight conditions. Among the active twist control inputs, the non-harmonic cases show the best performance gains in reducing the hub vibrations and power consumptions. The hub vibration is reduced by up to 75% while the rotor power is decreased by 2.8% as compared to the baseline uncontrolled rotor at the low speed descending flight condition. The resulting optimized actuation profiles for each of the active twist control cases are found denoted as a function of amplitudes and phases of the rotor response.
Veranstaltung: 41th European Rotorcraft Forum 2015
Medientyp: Conference Paper
Sprache: englisch
Veröffentlicht: DGLR-Bericht, 2016, 2016-01, 41st European Rotorcraft Forum 2015; S.-; 2016; Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn
Preis: NA
Stichworte zum Inhalt: active control;actuators;algorithms;BO-105 helicopter;descent;embedding;flight conditions;genetic algorithms;high speed;horizontal flight;hubs;low speed;rotary wing aircraft;rotary wings;rotor speed;rotors;segments;vibration;vibration damping;vibrato
Verfügbarkeit: Bestellbar
Veröffentlicht: 2016

Dieses Dokument ist Teil einer übergeordneten Publikation:
41st European Rotorcraft Forum 2015