Abstract
Integration of the correct tactile and kinesthetic force feedback response with an accurate computational model of a compliant environment is a formidable challenge. We examine several design issues that arise in the construction of a compliance renderer, specifically the interaction between impedances of tactile displays, impedances of robot arms, and the computational model. We also describe an implementation of a compliance rendering system combining a low-impedance robot arm for large workspace kinesthetic force feedback, a high-impedance shape display for distributed tactile feedback to the finger pad, and a real-time finite element modeler. To determine the efficacy of the integration of tactile and kinesthetic force feedback components, we conducted a study examining the user’s ability to discriminate stiffness. Subjects were able to reliably detect a 20% difference in rendered material stiffness using our compliance rendering system.
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