How to model a DC motor hoist with Simscape Multibody?

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Weixian Zhang
Weixian Zhang 2019-7-17
评论： Weixian Zhang 2019-8-2
I am new to Simscape. I want to model and simulate a simple hoist driven by a DC motor.
A rod is fixed to the wall at one end. Its other end is mounted with a DC motor, and the motor drives a rope spool to lift the load. See the figure.
未命名.png
But I have totally no idea how to connect the DC motor block (from Simscape/Electrical/Electromechanical/Brushed Motors) with the Belt-Cable Spool block (from Simscape/Multibody/Belts and Cables). I don't know how to drive the spool to spin with the DC motor. Any suggestions?

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回答（1 个）

SYED IMTIAZ ALI SHAH
Hi, you can use 'Belt-Cable Spool' in Simscape Multibody. The belt cable spool rotates about an axis, you can then attach a DC Motor with it, through 'Rotational Simscape Multibody' found in 'Simscape Multibody Multiphysics Library'.
This my not be much helpful, however now you know where to start from.
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SYED IMTIAZ ALI SHAH
SYED IMTIAZ ALI SHAH 2019-7-31
I looked into your .slx file. The motor and voltage sources were not there (Probably due to conversion from 2019b to 2018b) so I don't know what parameters values you had chosen. I replaced the block you used (Ideal Torque Sensor, and other two, attached to DC motor) with just one block Rotational Simscape Interface (found in Simscape Multibody Multiphysics Library, you need to install it form adon)
Instead of using fixed voltage source, I used controlled voltage source, your can play with the power of your motor and voltage to keep the mass at certain upward velocity. I used PID, due to lack of time I could not perfectly tune it, however it can easily be done.
attached it the 2018b slx file, I hope you can run it with 2019a/b.
Weixian Zhang
Weixian Zhang 2019-8-2
I'll explain what "fly in disorder" means...
Acutally I'm trying to simulate 4 motors lifting a load. This "fly in disorder" problem happens to the 1-motor model sometimes, but it happens to the 4-motor model more frequently.
屏幕快照 2019-08-02 上午11.37.52.png

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