Estimation Of Excitation Forces Research Articles

5131 歯面形状評価を目的とした歯車振動からの起振力推定(S63-6 振動(2),S63 伝動装置の基礎と応用)

Though, it has made progress on low vibration gear design and accuracy on gear manufacturing process, vibration problems due to alignment error, combination of meshing gears and non-uniformity of surface form of each teeth remains. Tooth surface measurement sometimes becomes inefficient to detect vibration problem due to small amount of surface deviation. In this research, we propose experimental estimation method of excitation force from vibration measurement results, and polar plot to classify gear vibration conciming to characteristics of surface deviation targetting meshing components vibration of helical gear pair. For precise estimation of excitation force, synchronous averaging technique is applied.

Estimation of Motor Excitation Force by Indirect Method

We developed two methods for accurate estimation of the excitation force of a motor. One is a hybrid method combining an experiment and a finite-element analysis. In the experiment, the circumferential acceleration of a motor housing was measured when the motor was in operation. Additionally, a finite-element model was created for the motor, and the circumferential acceleration response of this model was calculated. The measured and calculated accelerations were then used to estimate the motor excitation force. The other method is an elastic support method using the measured acceleration response. The amplitude and phase of excitation forces were estimated by solving an inverse dynamical problem that used as input the acceleration measured by accelerometers placed on the supporting beams of the motor. The results obtained by these methods agreed well with the excitation force measured by using load cell.

308 伝達関数に基づいた実稼動機器から発生する加振力の推定

308 伝達関数に基づいた実稼動機器から発生する加振力の推定