The hydraulic wander is the key equipment for hoisting mineral and personnel in mine,its sitting comfort as well as the conveyer efficiency and safety ,is the main factor to decided the velocity curve ,but often be ignored or not be considered in design.

The excellence and defect of various velocity curves are compared through timing process.

Based on the mathematics model of velocity curve for elevator, the computer simulation for the velocity curve has been developed, and according to the simulating data, ideal velocity curve of the system controlled by PLC could be obtained with digital methods.

An easy realizing method of speed curve of elevator;

According to the protective speed curves, the tracking measuring function of infrared laser position transducer is applied for back-up protection of travel speed.

The design method of 4 floor elevator model is introduced ,it is focus on the structure of the model,the setting of main registering signal ,outer calling signal and elevator well signal, speed curve setting and operating, and design of its PLC control system, and so on, the basic function of all centralized alternative elevator has been run on the model.

Under the situation of knowing the motion law of left and right driving motors and using the Matlab software,the velocity and acceleration curves and displacement curves in the X,Y directions of this mechanism were obtained.

In this paper, CAD is used to carry out the analysis of the positive kinematics of 3R robot, the velocity and acceleration curves are drawn and discussed and analyzed, and the robot machine working state is animatedly simulated.

This paper establishes the viscoelasticity dynamic model and researches the rectangle, triangle, sinusoid, parabola and the combined parabola acceleration curves.

According to the integral Jacobi constant, the spacecraft zero-velocity curves in the vicinity of the asteroid are described and feasible motion regime is analyzed.