Pulling against Gravity with a Pulley System

2 次查看(过去 30 天)
I am getting startet to work with Simscape and I made a very Simplistic crane which purpose is only to pull up a mass with a cable system.
I managed to build the Cable system, but when i insert a input signal for the "Revolution Joint" the mass just drops. I tried changing the rotation of the joint an I am convinced that the problem is that the pulleys can not pull against the gravity. Is it a problem that i used the pulleys on cylinder ?

采纳的回答

Juan Sagarduy
Juan Sagarduy 2020-11-22
Hi Matthias
It is difficult to say what happens without the model. But i wonder if the rigid transform between the revolute joint and the spool can be the cause of the problem. If the sign or value of torque are adjusted, and you see no difference, it is likely it.
In one of our examples port R (spool) and port F (winch joint) are directly connected. https://se.mathworks.com/help/physmod/sm/ug/block-and-tackle-with-four-pulleys.html
Hope this helped out. BR Juan
  2 个评论
Matthias Hueber
Matthias Hueber 2020-11-23
I tried out the model with the solution you provided, but my mass is still dropping down. when i change the Gravity to a positive value my mass goes up.
This is my model withe the Revolute Joint 1 shown at the cylinder in the back. I hope that helps to identify the problem.
Is there any possibility that the system does not provide enough force to pull up the mass?

请先登录,再进行评论。

更多回答(0 个)

类别

Help CenterFile Exchange 中查找有关 Assembly 的更多信息

产品


版本

R2020b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by