Using the impedance probe and Z-width plots combined with virtual stiffness-damping plots, I show that added active electrical damping improves the performance of the haptic display.High-Current Motor Amplifier I initially designed and built a high-current linear amplifier that acts as a controlled current source for the haptic display. This was implemented using a large DC power supply, with the motor in series with an H- bridge and parallel array of power ... The MOSFETs act as voltage controlled resistors, limiting the current through the motor. ... and the push-pull motor amplifier presently used with the haptic display can provide approximately 10 amperes of current.
|Title||:||Assessing and Increasing Z-width of Haptic Displays with Active Electrical Damping|
|Author||:||David W. Weir|
|Publisher||:||ProQuest - 2008|