In kinematics, the Chebyshev Lambda Linkage [1] is a four-bar linkage that converts rotational motion to approximate straight-line motion with approximate constant velocity. [2] It is so-named because it looks like a lowercase Greek letter lambda (λ). [3] The precise design trades off straightness, lack of acceleration, and the proportion of the driving rotation that is spent in the linear portion of the full curve. [4]
The example to the right spends over half of the cycle in the near straight portion. Coupler (link 3) point stays within 1% positional tolerance with intersecting the ideal straight line 6 times.
The linkage was first shown in Paris on the Exposition Universelle (1878) as "The Plantigrade Machine". [5] [3] The Chebyshev Lambda Linkage is a cognate linkage of the Chebyshev linkage.
The Chebyshev Lambda Linkage is used in vehicle suspension mechanisms, walking robots and rover wheel mechanisms. In 2004, a study completed as a Master of Science Thesis at Izmir Institute of Technology introduced a new mechanism design by combining two symmetrical Lambda linkages to distribute the force evenly on to ground with providing the straight vertical wheel motion. [6] It was then designed, manufactured and tested in the Earth Rover Project of Los Angeles City College Electronics Club. [7]
In kinematics, the Chebyshev Lambda Linkage [1] is a four-bar linkage that converts rotational motion to approximate straight-line motion with approximate constant velocity. [2] It is so-named because it looks like a lowercase Greek letter lambda (λ). [3] The precise design trades off straightness, lack of acceleration, and the proportion of the driving rotation that is spent in the linear portion of the full curve. [4]
The example to the right spends over half of the cycle in the near straight portion. Coupler (link 3) point stays within 1% positional tolerance with intersecting the ideal straight line 6 times.
The linkage was first shown in Paris on the Exposition Universelle (1878) as "The Plantigrade Machine". [5] [3] The Chebyshev Lambda Linkage is a cognate linkage of the Chebyshev linkage.
The Chebyshev Lambda Linkage is used in vehicle suspension mechanisms, walking robots and rover wheel mechanisms. In 2004, a study completed as a Master of Science Thesis at Izmir Institute of Technology introduced a new mechanism design by combining two symmetrical Lambda linkages to distribute the force evenly on to ground with providing the straight vertical wheel motion. [6] It was then designed, manufactured and tested in the Earth Rover Project of Los Angeles City College Electronics Club. [7]