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Real-Time Multiple Resonance Peak Detection in Servo Drive Applications

Mario Aldag and Joachim Horn
Institute of Control Engineering, Department of Electrical Engineering, Helmut-Schmidt-University/University of the Federal Armed Forces Hamburg, Holstenhofweg 85, 22043 Hamburg, Germany

Abstract—The performance of gearless servo drives is significantly degraded by mechanical resonances in the system. For applications the parameters of the mechanical resonances of a drive are not known a priori. In order to improve the identification process of resonance frequencies this article introduces a simple and efficient real-time capable algorithm to detect multiple resonance frequencies in a single identification run. The algorithm will be implemented using a digital signal processor which runs on a frequency inverter. It uses the frequency neighborhood to compute peaks. The performance of the algorithm is shown with a synthetic multisine signal and a measurement on a machine, where a workpiece is mounted on a direct torque round table. 

Index Terms—resonance peak detection; servo motors; notch filter; adaptive; online; system identification; simultaneous detection; real time

Cite: Mario Aldag and Joachim Horn, "Real-Time Multiple Resonance Peak Detection in Servo Drive Applications," International Journal of Mechanical Engineering and Robotics Research, Vol. 7, No. 5, pp. 569-574, September 2018. DOI: 10.18178/ijmerr.7.5.569-574