Minimisation of Helicopter Vibration through Active Control of Structural Response,
WESTLAND HELICOPTERS LTD YEOVIL (UNITED KINGDOM)
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Vibration still remains as one of the major problem areas for rotary-winged flight. In order to control helicopter vibration, many absorption and isolation schemes have been applied with limited success. Advances in both computational techniques and actuator technologies have created a firm base for the development and application of active control strategies to the helicopter. This paper details one such technique and its current demonstration installation on a Westland 30 helicopter. Termed Active Control of Structural Response ACSR, the technique employs high-frequency force-actuation within the helicopters structure. These forces are superposed onto the dominant vibratory forces in an active manner, such that the fuselage vibratory response is minimised. The basic control philosophy for ACSR is described and the current experimental demonstration status is detailed. NATO.