Abstract
We developed a new method for accurate estimation of the excitation force of an electric motor by inverse system using measured acceleration response. Usually, an electric motor is attached to a supporting structure in some points. Therefore, we have to estimate the amplitude and phase of motor excitation forces. The amplitude and phase of motor excitation forces were estimated by solving an inverse dynamical problem with measured values of the acceleration. To solve this inverse problem, we employed an accelerometer to measure the accelerations of the supporting beams of the motor. In the experiment, the acceleration of a beam was measured when the motor was in operation. Additionally, the inverse system was created by using the equations of motion for both the motor and the supporting beams. The results obtained by this method agreed well, with the results of the excitation force measured by using a load cell directly.
