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Multiple Choice

In robotics, a holonomic drive train has how many degrees of freedom?

Movement in the plane with independent control of orientation is what a holonomic drive train provides. In planar motion this yields three independent motions: translation along the x-axis, translation along the y-axis, and rotation about the vertical axis (the robot’s heading). Because you can move forward/back, side-to-side, and turn at the same time, there are three degrees of freedom. The other numbers would imply extra motions that aren’t present on a typical ground robot on a flat surface (like up/down or roll/pitch), or would omit one of the essential planar motions, so they don’t fit holonomic behavior.

Movement in the plane with independent control of orientation is what a holonomic drive train provides. In planar motion this yields three independent motions: translation along the x-axis, translation along the y-axis, and rotation about the vertical axis (the robot’s heading). Because you can move forward/back, side-to-side, and turn at the same time, there are three degrees of freedom. The other numbers would imply extra motions that aren’t present on a typical ground robot on a flat surface (like up/down or roll/pitch), or would omit one of the essential planar motions, so they don’t fit holonomic behavior.