Software design to calculate and simulate the mechanical response of electromechanical lifts

5th Symposium on the Mechanics of Slender Structures

物理学;力学

Herrera, I.^1 ; Romero, E.^1

Escuela de Ingenierías Industrials, Universidad de Extremadura, Avda. de Elvas s/n, Badajoz

06006, Spain^1

关键词: Configuration parameters;    Control parameters;    Electromechanical lifts;    Governing equations;    Mechanical response;    Performance parameters;    Research and development;    Vertical displacements;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/721/1/012009/pdf
DOI  :  10.1088/1742-6596/721/1/012009

学科分类：力学，机械学

来源: IOP

【 摘 要 】

Lift engineers and lift companies which are involved in the design process of new products or in the research and development of improved components demand a predictive tool of the lift slender system response before testing expensive prototypes. A method for solving the movement of any specified lift system by means of a computer program is presented. The mechanical response of the lift operating in a user defined installation and configuration, for a given excitation and other configuration parameters of real electric motors and its control system, is derived. A mechanical model with 6 degrees of freedom is used. The governing equations are integrated step by step through the Meden-Kutta algorithm in the MATLAB platform. Input data consists on the set point speed for a standard trip and the control parameters of a number of controllers and lift drive machines. The computer program computes and plots very accurately the vertical displacement, velocity, instantaneous acceleration and jerk time histories of the car, counterweight, frame, passengers/loads and lift drive in a standard trip between any two floors of the desired installation. The resulting torque, rope tension and deviation of the velocity plot with respect to the setpoint speed are shown. The software design is implemented in a demo release of the computer program called ElevaCAD. Further on, the program offers the possibility to select the configuration of the lift system and the performance parameters of each component. In addition to the overall system response, detailed information of transients, vibrations of the lift components, ride quality levels, modal analysis and frequency spectrum (FFT) are plotted.