• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.865_866
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• 2009

In this paper, a novel structure Bearingless SRM with hybrid stator poles is proposed. The motor torque can be controlled independently from radial force control. Analytical models of torque and radial force for proposed structure are explained. Based on these models, control scheme of desired radial force is proposed. In this control method, the magnitude of force can be controlled in arbitrary direction and magnitude by selecting some combinations of radial force windings. The validities of structure and control method are verified by the experimental results when motor is at standstill and running.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.46 no.7
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• pp.542-550
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• 2018

This paper presents design of a bearingless main rotor of SNUF (Seoul National University Flap) blade equipped with active trailing-edge flap to reduce the hub vibratory loads during helicopter forward flight. For that purpose, sectional design of the flexbeam is carried out using the thin-walled composite material rotating beam vibration analysis program (CORBA77_MEMB) in EDISON. Using the multi-body dynamics analysis program, DYMORE, blade dynamic characteristics and those of the loads control are examined using the active trailing-edge flap in terms of the flexbeam sectional design.