Proposal of the swashplateless small helicopter applying the motor position of sensorless motor

Abstract

Eliminating the swash plate from a small helicopter can contribute to the weight reduction, the maintenance simplification and the cost reduction. Therefore, this paper proposes an electronically controlled swash plate mechanism using a sensorless motor for driving the main rotor. The sensorless motor is used as a sensor for acquiring the angle of the main rotor. Then, the main rotor angle is calculated from the acquired motor angle to drive the rotor blades. The paper, describes the swashplateless mechanism and the control method.