Simultaneous sensing cum actuating linear motor

This work aims to build up on a new measurement method to monitor the speed, velocity, and mechanical impedance of an electric machine (a linear motor) without using conventional sensors. Tested is a back-drivable linear motor stage which uses the linear motor electric machine as simultaneous sensor cum actuator. By calibrating the Transduction Matrix of the linear motor, the sensor cum actuator determines the velocity, load, and mechanical impedance of the motor by measuring the motor's time variant electrical impedance. The method is validated by an experimental procedure.