Enhanced performance inertial measurement unit (IMU) system and method for error, offset, or drift correction or prevention

US11976925B1 · kind B1 · utility

Assignee

• Orbital Research Inc. · US

Inventors

• Anthony Opperman · Wickliffe, US
• Frederick J. Lisy · Euclid, US
• Edward J. Rapp · Cleveland Heights, US
• Angela M. Lisy · Euclid, US
• Scott Suren · Brunswick, US
• Douglas E. Russell · Canal Fulton, US

Key dates

• Filing date: Dec 15, 2022
• Grant date: May 7, 2024
• Expiry date: Dec 15, 2042

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F42B30/10
• WIPO field: Measurement
• WIPO sector: Instruments

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.