Linkage Solver

Version (2.29 MB) by Jed F.
Solves for two unknowns in a mechanical linkage system.
Updated 1 Jun 2010

View License

link_solver will solve for any two unknowns in a mechanical linkage system. It is precompiled to solve for systems up to 10 mechanical linkages. If the symbolic library is installed then it can be expanded indefinitely.

Example: Given the four bar linkage in the shape of a square, the top bar length and angle is 'unknown'.
[link2, angle2]=fourbar(5,90,[],[],5,270,5,180)
[link2, angle2]=link_solver(5,90,[],[],5,270,5,180)

Will correctly identify that the second link is of length 5 with angle 0.

All functions accept matrix input to solve for multiple orientations at once.
Will solve for the angles of links 2 and 3 of a mechanical slider four bar system. As linkage 1 is rotated a full 360 degrees.

draw_bar will take the output from link_solver and create a plot for a given mechanical system. This can be put in a for loop to create a movie of the motion of a mechanical linkage system.

Includes documentation, examples (with published code) and movies of mechanical systems.

(fourbar is just a wrapper for link_solver to solve for four bar linkages.)

Also be found on GitHub:

Cite As

Jed F. (2024). Linkage Solver (, MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2007b
Compatible with any release
Platform Compatibility
Windows macOS Linux
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