Project Robotics - March 2009 - (Page 8) producing very stiff surfaces (one way of judging a haptic system’s performance), in free motion they require processing and actuation that can introduce a time lag into the system. Colgate and peshkin, along with professor kevin lynch, currently co-direct northwestern’s laboratory for intelligent Mechanical systems. The lab’s major focus is on interaction mediated by physical contact and the exchange of forces and motions, and it has produced multiple generations of cobots. using graphiCal systeM design researchers at the georgia institute of Technology intelligent Machine figure 3 this two-degreeof-freedom unicycle cobot developed at northwestern university uses a roller blade wheel on a smooth surface to constrain the user’s motion to a single-degree-of-freedom path. dynamics laboratory (iMdl) also study the use of passive haptic systems. in one project, drs. Wayne Book and Benjamin Black explored whether passive haptic systems can be as effective as active haptic systems for remote operation of a device, with the additional guarantee of safety. one of the main limitations of passive haptic systems, however, is that the device cannot be placed in a specific position. instead, the passive actuators must guide the operator to the desired position. Book and Black worked on how to overcome this limitation by developing advanced control strategies for the passive actuators. The design of the system involved several steps that were made possible by the graphical system design approach. graphical system design employs the combination of graphical development software tools and off-the- shelf hardware to rapidly design, prototype, and deploy embedded control devices. Contents Viewpoint the Cutting edge for haptiC researCh Modeling CoMplex eleCtroMeChaniCal systeMs deVeloping a two-wheeled self-BalanCing transport platforM home page product training Module online ordering suppliers Catalog 8 | VoluMe 1 | nuMBer 1 http://ad.doubleclick.net/clk;212362954;32989198;w?http://www.digikey.com http://ad.doubleclick.net/clk;212362954;32989198;w?http://www.digikey.com http://ad.doubleclick.net/clk;212363051;32989198;l?http://digikey.com/PTM/PTMMaster.page?site=us&lang=en http://ad.doubleclick.net/clk;212363300;32989198;i?http://ordering.digikey.com/ordering/addpart.aspx?site=US&source=search http://ad.doubleclick.net/clk;212363091;32989198;p?http://digikey.com/Suppliers/SupplierIndex.page?site=us&lang=en http://ad.doubleclick.net/clk;212363309;32989198;r?http://dkc1.digikey.com/us/en/pdf/Current.html
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