The design and development of a high-performance robotic device is a process with numerous competing factors. The mechanism weight and stiffness exist at opposite ends of the spectrum, the goal being to achieve the highest structural rigidity while maintaining the lowest segmental inertias. Contributing to these underlying requirements are factors such as the operational workspace, desired joint torques, motor placement, link design and cable selection. Since the device will operate in direct contact with humans, additional requirements emerge regarding comfort and safety of operation.

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