在進行升降機設計時，對升降機穩定性進行分析是非常必要的，下面5點忽略因素。It is very necessary to analyze the stability of the elevator when the elevator design is carried out in Shanghai, and the following 5 factors are ignored.

1.升降機上、下作業臂、支腿、輪胎等都具有足夠的剛度，不考慮升降機升降機的柔性。Shanghai elevator, the lower operating arm, legs, tires and so on have sufficient stiffness, do not consider the flexibility of the elevator lift.

2.升降平臺液壓缸的質量變幅很小，不會對升降不穩產生影響，忽略不計。The quality of the hydraulic cylinder of Shanghai lift platform is very small, which will not influence the fluctuation of the hydraulic cylinder.

3.升降貨梯作業時，用4條支腿作支撐，而所有輪胎都完全離開地面。Shanghai lift cargo operations, with 4 legs for support, and all the tires are completely out of the ground.

4.將升降平臺工作平臺及其載荷看作一個集中載荷固結在上作業臂末端。The working platform of Shanghai lifting platform and its load is regarded as a concentrated load which is fixed on the end of the upper working arm.

5.升降機上、下作業臂為勻質桿狀結構，其質心在各臂的幾何中心位置將工作平臺及其載荷看作一個集中載荷固結在上作業臂末端。The upper and lower operating arms of the Shanghai elevator are a homogeneous rod structure, and the center of mass of the upper and the lower working arms are regarded as a concentrated load of the working platform and the load is fixed on the end of the upper working arm.