an ancient China compass chariot was designed and simulated with virtual prototyping technology.Differential gear was used in the machine to compensate for the turning of the chariot
so that the angular velocity of the compass pole to the earth is always zero
achieving south pointing function.The principle is tested reasonable since simulation and prototype production have been successful.The compass chariot has simple structure
less transmission parts
easy to observe and understand
and can be met the need of public science education.