Mobile Robots:
All mobile robots move from place to place. They need to be able to move
forward, to reverse, and to turn to the left or right.Land locomotion can be
broadly characterized as quasi-static or dynamic.Quasi-static equilibrium implies
that inertial (acceleration-related) effects aresmall enough to ignore. That is,
motions are slow enough that static equilibrium can be assumed. Stability of
quasi-static systems depends on keeping the gravity vector through, the center of
mass, within the vehicle’s polygon of support determined by the ground-contact
points of its wheels or feet. Energy input is utilized predominantly in reacting against
static forces. Such systems typically have relatively rigid members, and can be
controlled on the basis of kinematic considerations.

Swimming Robots:
Navy experts and industry leaders are looking into the latest generation of unmanned underwater vehicles (UUVs) for maritime applications ranging from training and mission rehearsal, undersea surveys and surveillance, and locating and destroying enemy mines, to potentially even covertly deploying weapons.

Flying Robots:
All flying robots fly from place to place. They need to be able to fly
forward, to reverse, and to turn to the left or right.