Abstract: Inertial measurement units (IMUs) and methods with adaptations to eliminate or minimize sensor error, offset, or bias shift are presented. More particularly, the IMUs and methods for gun-fired projectiles herein are particularly adapted to accurately measure forces and to prevent or minimize the error, offset, or bias shift associated with events exhibiting high g shock, and/or high levels of vibration, and/or rotation. Even more particularly, the IMUs and methods herein utilize novel IMU packaging adapted to prevent or minimize sensor error, offset, or bias shift, and recalibration adaptations and methods adapted to correct or reset the error, offset, or bias shift from such an event. The IMUs are adapted to provide accurate measurements prior to, during and after such event, and to provide continuous accurate measurements during flight of gun-fired projectiles.

Abstract: Inertial measurement units (IMUs) and methods with adaptations to eliminate or minimize sensor error, offset, or bias shift. More particularly, such IMUs and methods for gun-fired projectiles and particularly adapted to accurately measure forces and to prevent or minimize the error, offset, or bias shift associated with events exhibiting high g shock, and/or high levels of vibration, and/or rotation. Even more particularly, such IMUs and methods utilizing novel IMU packaging adapted to prevent or minimize sensor error, offset, or bias shift, and recalibration adaptations and methods adapted to correct or reset the error, offset, or bias shift from such an event. Ultimately relates to IMUs that are adapted to provide accurate measurements prior to, during and after such event, and to provide continuous accurate measurements during flight of gun-fired projectiles.