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

US11585660B1 · 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: Aug 14, 2020
• Grant date: Feb 21, 2023
• Expiry date: May 11, 2041

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. 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.