Stewart platform

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Two hexapod positioners

A Stewart platform is a type of parallel robot that incorporates six prismatic actuators, commonly hydraulic jacks. These actuators are mounted in pairs to the mechanism's base, crossing over to three mounting points on a top plate. Devices placed on the top plate can be moved in the six degrees of freedom in which it is possible for a freely-suspended body to move. These are the three linear movements x, y, z (lateral, longitudinal and vertical), and the three rotations pitch, roll, & yaw. The term "six-axis" platform is also used.

• See also: Wikipedia, Commons

• Related: Parallel manipulator, Robot kinematics, Acceleration onset cueing, Linear actuator

Pictures of the NIST/Ingersoll prototype octahedra... Pictures of the NIST/Ingersoll prototype octahedral hexapod www.mel.nist.gov/photos/photo/phexa99.html - Web

Hexapod Structures for Surgery Hexapod Structures for Surgery www.engr.sjsu.edu/.../hexapod_Shirke.ppt - Web

Hexapod for Astronomy Hexapod for Astronomy www.hexapods.net/pdf/Hexapod_In_Astronomy_Paper.pdf - Web

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