Indian Journal of Science and Technology

Abstract

Objective: Electromechanical actuators convert rotary motion to linear motion. The electromechanical actuation system considered in this paper is a position servo system. In overall the entire work involved in this paper may be outlined into modelling and simulation of Electro-Mechanical Actuator in frequency domain in Matlab software and Velocity estimation from the hall sensor signals using digital signal controller. Method: The scope of the project is to evaluate the speed of the rotor using the hall sensor signals. Generally a tacho winding in the motor is used for speed of the motor. The EMF generated on the winding is proportional to speed of the rotation of the motor. By decoding the signal from the tacho winding speed of the rotor is determined. This results in the addition of necessary circuitry to decode the signals from the tacho windings. Findings: So on usage of hall sensor signals to determine the speed of the rotor will avoid the ­usage of tacho winding and its associated circuitry. Hence, increases the efficiency along with the reliability of the motor. Application: This method is used in flight control systems of aircrafts, missiles in aerospace industries.
Keywords: Brushless DC Motor, Digital Signal Processor, Electro-Mechanical Actuator, Hall Sensors, Velocity Estimation