Development of Anti-Vibration Devices for Gondola Lifts

索道载体在风的作用下容易产生摆动，且很难减小。本文研究了动力吸振器和控制力矩陀螺两种方法。根据作者提出的动力吸振器理论，建立了由移动质量块和圆形轨道组成的用于升降椅和吊篮的实际动力吸振器。阻尼力是由运动质量块上的永磁体和铝导轨产生的涡流引起的。轨端制动器应具有较低的恢复系数和较高的阻尼比。由于吊篮的固有频率随吊篮位置的变化而变化，因此采用了具有两个不同固有频率的双吸振系统，并采用了被动式陀螺阻尼器（50kg）。转子的轴由弹簧和阻尼器支承，轴的倾斜可假定为一个自由度。在两种类型的吊舱（500kg，6名乘客和2500kg，39名乘客）上进行了两个陀螺的实验。自由反应摆幅分别在2个和10个周期内稳定。该系统对主系统固有频率的变化具有较强的鲁棒性，并已在北海道的滑雪场中得到应用，证明了陀螺仪在实际缆车中的应用价值。

Swing of a ropeway carrier is easily caused by wind and it is very difficult to reduce. In this study, two methods, dynamic absorber and control moment gyro were investigated. Base on the theory of dynamic ansorber formulated by the authors, the actual dynamic absorbers composed of a moving mass and a circular track for chair lifts and gondola were built. The damping force was induced by eddy current caused by permanent magnets on the moving mass and an aluminum track. The stopper at the end of track should have a low coefficient of restititution and a high damping ratio. Since the natural frequency of the gondola varies depending on the locating of the gondola, the double absorber system which had two different natural frequencies was introduced and it showed the robustness.The passive-type gyroscopic damper (50kg) was composed. The axle of rotor was supported by a sping and a damper, and the tilt of the axle could be assumed to have one degree of freedom. The experiments with two gyros were carried out with two types of gondola (500kg, 6 passengers, and 2500kg, 39 passengers). The swing of free response was settled in 2 and 10 periods, respectively. This system has more robustness for the varies of natural frequency of the main system.The dynamic absorber was already used in snow skiing sites in Hokkaido, and it is proved that the gyro can be used in the actual gondola.