Regelungstechnische Methoden zur Drehschwingungsdämpfung eines Wellenstrangs am Beispiel eines Motorprüfstands

It is very common in the automotive industry to couple components such as the engine or parts of the drive train with an elastic torque shaft to a dynamometer to test these parts. The stiff coupling results in weak dampened resonance frequencies which commonly get excited by the oscillating loads of the test item. The resulting torsional vibrations can lead to distortions of the measurement or even to damage of the test item. As a result, it is important to consider sufficient damping of the drive train. In addition to mechanical dampers also active damping methods serve as suitable alternative to dampen torsional vibrations at test benches. This article focuses on active vibration damping methods through specific control of the dynamometer. It analyzes a conventional method and, moreover, presents a new approach for torsional vibration damping based on a Kalman-Filter for state estimation.