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We are conducting research in the area of teleoperation with feedback delay. Delay occurs with earth-based teleoperation in space and with surface-based teleoperation with untethered submersibles when acoustic communication links are involved. The delay in obtaining position and force feedback from remote slave arms makes teleoperation extremely difficult leading to very low productivity. We have combined computer graphics with manipulator programming to provide a solution to the problem. A teleoperator master arm is interfaced to a graphics based simulator of the remote environment. The system is then coupled with a robot manipulator at the remote, delayed site. The operator's actions are monitored to provide both kinesthetic and visual feedback and to generate symbolic motion commands to the remote slave. The slave robot then executes these symbolic commands delayed in time. While much of a task proceeds error free, when an error does occur, the slave system transmits data back to the master environment which is then "reset" to the error state from which the operator continues the task.
Richard P. Paul, Janez Funda, Thomas Lindsay, Masahiko Hashimoto, and Craig Sayers, "Model Based Teleoperation to Eliminate Feedback Delay NSF Grant BCS89-01352 Second Report", . October 1992.
Date Posted: 01 August 2007