An inertial measurement unit (IMU) contains three linear acceleration sensors and three rotational speed sensors.

A navigation system includes an inertial measurement unit, a navigation computer, a GPS receiver, and a clock controller.

The inertial measurement unit has a first clock and a first switch, the navigation computer has a second clock and a second switch, and the GPS receiver has a third clock.

The processing unit of the system also includes a filter for generating estimates of attitude for the vehicle using the inertial measurements from the inertial measurement unit and the attitude computations.

A measurement system having a miniature, wireless inertial measurement unit (IMU) disposed within or on a moving object, such as a ball or other member, to calculate the kinematics of the moving object.

A rotatable platform (22) is mounted within the case and carries an inertia! measurement unit (IMU) (30) and a roll axis gyroscope (34).