lever

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lever

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Library

Iconic Diagrams\Mechanical\Translation\Transmission

Use

Domains: Continuous. Size: 1-D. Kind: Iconic Diagrams (Translation).

Description

Lever

This models represents any type of lever with two counter-moving ports. The lever is ideal, i.e., it does not have inertia, friction or geometrical limitations. The lever has one fast moving port and one slow moving port. The lever ratio is the (absolute) ratio of the velocities of both ports. The causality of this model is always mixed: one port has a force out causality while the other has an velocity out causality:

 

p_fast.F = -i * p_slow.F

p_slow.v = -i * p_fast.v

 

or:

 

p_slow.F = -1/i * p_fast.F

p_fast.v = -1/i * p_slow.v

 

Interface

Ports

Description

p_fast

p_slow

Fast moving translation port.

Slow moving translation port.

Causality

 

p_slow notequal p_fast

 

Parameters

 

i

lever ratio p_slow.v / p_fast.v [], 0 < i < 1

Note

Keep the lever ratio i between 0 and 1. Confusion might otherwise exist:

i > 1: the fast moving port is slower than the slow moving port (you better interchange the connections of the lever model).
i < 0: the ports are not counter-moving (use the transmission model instead).