methods of haptic feedback

When simulating the macroscale characteristics of touch and motion, Virtual Reality (VR) systems must simulate the relative resistance that virtual things would exert on movement of parts of the body especially hands and legs. For instance, if one lifts a virtual cube, then one's hand and arm should sense the relevant resistance so that the virtual cube to seem real. Touch and motion based resistance can be conveyed from a computer to one's senses though micropressure machines (tiny pistons, inflatable bubbles, and so forth) powered by mechanical motors, magnetism, hydraulics, air, or other media. These micro-pressure machines can be incorporated into glovess, electronically-wired clothing, or gyroscopic armatures. Direct resistance from three-dimensional fields may be possible in the future, but remains experimental. Touch and motion based computer-to-human interaction will become more common with scientific advances, but it currently delays behind communication through sight and hearing. Additional general information at Yunhe Shen's research in VR based surgery simulation .

In addition to its being used in navigation of fighter planes and ships, virtual reality has numerous possible military applications including telerobotics for surveillance or (eventually) active battle in hazardous areas. VR-based simulations are also helpful for training for combat situations and anti-terrorism scenarios. Unique reference material at Virtual Tours Wisconsin .

The site Virtual Robots also has developments on this that may be of interest.