Stewart platform

Because the device has six actuators, it is often called a hexapod (six legs) in common usage, a name which was originally trademarked by Geodetic Technology[2] for Stewart platforms used in machine tools.

[6] In industrial applications, linear actuators (hydraulic or electric) are typically used for their simple and unique inverse kinematics closed form solution and their good strength and acceleration.

A unique closed form solution for the inverse kinematics of rotary actuators also exists, as shown by Robert Eisele.

James S. Albus of the National Institute of Standards and Technology (NIST) developed the Robocrane, where the platform hangs from six cables instead of being supported by six jacks.

The Computer Assisted Rehabilitation Environment developed by Motek Medical uses a Stewart platform coupled with virtual reality to do advanced biomechanical and clinical research.

An example of a Stewart platform
The AMiBA radio telescope, a cosmic microwave background experiment, is mounted on a 6 m carbon fibre hexapod.
Hexapod during the " Army-2021 " exhibition.
Two hexapod positioners
A Stewart platform in use by Lufthansa
Eric Gough's Tire Testing Machine, which is a Stewart platform with large jacks
Personnel transfer from an offshore construction via an Ampelmann system