Physically dissipative damping can increase the range of passive stiffness that can be rendered by a haptic device. Unlike
simulated damping it does not introduce noise into the haptic control system. A DC motor can generate such damping if it’s
terminals are shorted. We employ a configuration of the H-bridge which can cause this damping to impart stability to our haptic
device. This results in an increase in passive wall stiffness of about 33.3% at a sampling rate of 100Hz and 16.6% at 1kHz
over the performance of an undamped DC motor. We have also attempted to implement the system on the hybrid haptic control
system [1], it was seen that a perceivable change in the performance of this system was not observed by the use of DC motor
damping.
Keywords Haptics - Instability - Passiveness - Continuous Time - Programmable logic devices (PLD)