Systems, methods and computer-executable code stored on computer readable
media for synchronizing the evolving state of a dynamic object in a
shared virtual environment among a plurality of geographically separated
computers connected in a communications network including data
communications links introducing time delays in the propagation of data
between said computers. The synchronization scheme utilizes an advanced
feedback controller to compensate for the state error between sites,
comprised of a linear compensator and a Smith predictor based internal
model, to determine correct control forces creating a smooth input while
maintaining high levels of responsiveness and consistency. A recovery
filter for restoring the natural motion of the virtual object distorted
by synchronization control is also described.