how can I make a beam tangent to a moving axis?

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eran nav
eran nav 2017-8-4
回答： Nicolas Schmit 2017-9-21
hello everyone,
I'm trying to model a system in simscape using the simMechanics blocks. The system im trying to model is: a ball bearing connected eccentrically to a motor axis. On that ball bearing lays a beam. The edge of the beam is connected to an axis. so, the system looks like this:
http://imgur.com/EyTlFzk
I managed to model all the elements, but I don't know how to keep the beam tangent to the ball bearing.
http://imgur.com/79x4u92
http://imgur.com/WEhPJQu
http://imgur.com/wzLGzIP
motor = blue, motor axis = cyan and purple Right now, when the motor axis move, the beam (orange) just pass through the ball bearing (green)
how can I "connect" the beam to the ball bearing?

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回答（1 个）

Nicolas Schmit
Nicolas Schmit 2017-9-21
  1. Add a prismatic joint that has its z axis aligned with the beam.
  2. Add a rigid transform that translate orthogonal to the beam. The translation distance is the radius of the bearing.
  3. Add a revolute joint. Connect the follower of the revolute joint to the axis of the bearing.

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