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先看图1,假使圆輪在轉动,它的轉动軸綫——自轉轉动軸綫(桿)对支柱來說,在垂直方向或水平方向都可以轉动。OA代表这一軸线的方向。如果重物比圓輪所在的迴轉仪重,由于地心吸力作用的結果就有使圓輪这一边的捍翹起來的倾向,这就是說,有使整个圓輪繞另一个水平軸OB(叫‘强迫轉动軸’,在这里垂直于紙面)轉动的倾向。可是事实上圓輸这边的桿并不翹起來,而是繞着一个垂直軸綫OC轉动(OC垂直于OA及OB),就是說,桿会在水平面內轉动。这个現象的產生,是由于
Looking first at Fig. 1, if the circular wheel is rotating, its axis of rotation - the axis of rotation (rod) - can rotate in the vertical or horizontal direction for the pillar. OA represents the direction of this axis. If the weight is heavier than the gyroscope on which the wheel is located, the result of the suction effect of the center of gravity will tend to tilt the turn of the side of the wheel. That is to say, there is a rounding of the entire circle around the other horizontal axis OB. ’Forced rotation of the axis’, here perpendicular to the paper surface) tendency to turn. However, in fact, the rod that is on the side of the circle is not tilted, but is rotated around a vertical axis OC (OC is perpendicular to OA and OB), that is, the rod rotates in the horizontal plane. This phenomenon is caused by