Considerations for Robust Haptic Interaction with Virtual Dynamic Systems

A grand challenge…

Guiding vision

Challenges
which stem from this vision

Framework
for addressing challenges

An early passivity result

Passivity of a virtual wall

Experimental results
J. Michael Brown, MS Thesis

Implications for haptic display design

High frequency damping:  the key to dynamic range

Aside:  why cobots?

Key advantage of cobots:  dynamic range

From virtual walls to complex simulations:  the virtual coupling concept

Virtual coupling:  passivity

Virtual coupling:  significance

But it doesn’t work in practice!

An improved framework:  energy management
Brian Miller’s work

Energy management framework

Transformed haptic system

Energy management in the transformed system

For more detail…

A case study:  impulse-based simulation of rigid body systems
Beeling Chang and Brian Miller

The “real-time” constraint

The key problems with hard real-time impulse-based simulation

A strategy that seems to work…

A closer look at contact state determination

A closer look at contact state determination (2)

Contact state determination is important!

Conclusions