Английская Википедия:Chebyshev lambda linkage

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Шаблон:Short description

Файл:Chebyshev Lambda Linkage.gif
Animation of the Chebyshev Lambda Linkage
Dimensions (unit length Шаблон:Mvar): Шаблон:Legend-line Шаблон:Legend-line Шаблон:Legend-line Link 1 (horizontal distance between ground joints): Шаблон:Math
Файл:Tchebyshevs plantigrade machine.gif
Chebyshev's plantigrade machine.
Файл:Chebyshev Table Linkage.gif
A Chebyshev Translating Table Linkage, which combines together two cognate linkages: the Chebyshev Linkage and Chebyshev Lambda Linkage.

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]

See also

References

Шаблон:Reflist

External links

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