使用Simscape Multibody Contact Forces Libray 出现External Force and Torque has its follower port rigidly connected to the world frame; it has no effect. You can configure this diagnostic in the Simscape Multibody Configuration Parameters dialog 的解决办法
在学习使用Simulink中的模块库Simscape Multibody Contact Forces Libray时出现了[’…/Face to Plane Force/Sphere to Plane Force nz1’]: External Force and Torque ‘…/Face to Plane Force/Sphere to Plane Force nz1/External Force and Torque PlaB’ has its follower port rigidly connected to the world frame; it has no effect. You can configure this diagnostic in the Simscape Multibody Configuration Parameters dialog.
解决办法如下：
此错误是由于新Simulink模型的默认设置导致的，该设置与接触力库不兼容。
打开“Simulation ”>“Model Configuration Parameters”
在Simscape Multibody >Diagnostics窗口中，将“Rigidly constrained block”更改为“warning”或“none”。
具体参考：Rigidly connected port error with Simscape Multibody Contact Forces Library