Improved haptic interaction control with force filter compensator

Stability of a haptic interface is essential for safe and quality haptic interaction. This paper addresses the contact instability of admittance control haptic interface in free space. Experiments with special dedicated system for measuring grasp force have been performed to explore conditions of contact instability. Baseline experimental results are here compared to simulations from a model of haptic interaction. The model serves also as a basis for stability and performance improvements with a special compensator filter for force filtering. Experimental and simulation results both confirm stability improvements.