Service Communautaire d'Information sur la Recherche et le Développement - CORDIS

Validation of the added interest in associating tactile motors and haptic devices

The MUVII project has achieved something very new in its haptic feedback system development. It has combined force feedback with tactile feedback. All of today's force feedback systems are based on the premise of a single feedback vector (directional) force. For enhanced virtual reality the MUVII haptic system added "surface detail" information, such as the "angle" or contour of the touched point which the user's finger experiences in the real world are also made available through the active surface of the tactile motor.

The Immersion company has attempted to simulate the sensation of "touch" in their haptic glove by providing an impulse to the finger nail when the finger tip pulp comes into contact with the virtual object. MUVII not only provides this information directly to the fingertip pulp, but also the angular contact and even texture information.

The MUVII system was first demonstrated to the general public at Laval Technopole in May 2004. Please refer to the written user response reports "IKD and ITD comments_LV04.doc" where many users specifically commented on the new tactile sensations when touching objects, and specifically when feeling the rotating gears.

To the best of knowledge all of today's force feedback systems are based on a starting or datum point. In other words, all these systems work on the assumption based on object and surface coordinates are measured from a single fixed datum point.

What is new in the ITD system is that you can move your arm around in a large 3D room and when your hand intersects with an object it is a relative calculation and it is just the wrist which feels the obstruction, your arm is still "floating".

Another way to view this is the way we use the computer mouse, which also is a relative device. Then think of a mouse programmed as a datum device such that the mouse pad exactly represents the screen area, and the position of the mouse on the mouse pad corresponds directly to the position of the cursor on the screen. That is the way most/all force feedback devices are programmed.

Reported by

Laval Mayenne Technopole
6, rue Léonard de Vinci - BP 0102
53001 LAVAL Cedex