How to model two-rack-one-pinion coupling in Simscape Multibody?

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Julia
Julia 2017-10-13
编辑： Nicolas Schmit 2017-10-18
I would like to model the coupling which consists of two parallel racks with the mutual pinion in between of them in Simscape Multibody. Based on tutorial I connected two racks to F-ports of two Rack and Pinion Constraint Blocks and one pinion to Blocks' B-ports. Each Rack in its turn were connected to the prismatic joint and pinion was connected to revolute joint. In order to connect racks properly I used different reference frames in pinion which were opposite in their X, Y - directions. But I got an error "Model not assembled: position violation". I would appreciate any help.

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Nicolas Schmit
Nicolas Schmit 2017-10-18
Seems like you have a geometric loop with incompatible constraints. Try to break the geometric loop by commenting out one of the Rack and Pinion Constraint Blocks, and assemble your mechanism. This should give you a idea of how to correctly orient the frames to close the loop.

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