Hybrid inertial navigation system and method
| DWPI Title: Hybrid inertial navigation system with conventional inertial measurement unit, involves setting detuning, intensity, and pulse duration of light-pulse atom interferometer accelerometer Raman pulse to corrected detuning based on control signal |
| Abstract: A hybrid inertial navigation system and method are provided. The system includes a conventional inertial measurement unit (with a three-axis accelerometer and a three-axis gyroscope operating at a high data rate and low sensitivity), light pulse atom interferometer accelerometer and gyroscope (operating at a low data rate and high sensitivity), and a processing system. The method of the hybrid inertial navigation system includes precisely determining an acceleration and an angular velocity and allowing light pulse atom interferometry operation under dynamic environments. A processing system of the hybrid inertial navigation system performs feedforward correction operations on the light-pulse atom interferometer accelerometer and gyroscope of the hybrid inertial navigation system. The processing system determines one or more control signals based on the inertial information from the conventional inertial measurement unit, a light pulse atom interferometer model, and the feedforward algorithm. |
| Use: Hybrid inertial navigation system with conventional inertial measurement unit (IMU) having three-axis accelerometer implemented as three orthogonal single-axis accelerometers (IMU-ACCs) and three-axis gyroscope of three orthogonal single-axis gyroscopes (IMU-GYROs) and light-pulse atom interferometer (LPAI) inertial sensors such as LPAI accelerometers (LPAI-ACCs) and LPAI gyroscopes (LPAI-GYROs). |
| Advantage: The hybrid INS can precisely determine an acceleration and an angular velocity and to allow LPAI operation under dynamic environments. The processing system determines one or more control signals based on the inertial information from the IMU-ACCs and IMU -GYROs, the LPAIMI physics model, and a feedforward algorithm. The system provides a compact, deployable light-pulse atom interferometer (LPAI) accelerometers (ACCs) and gyroscopes for inertial navigation while maintaining laboratory-level performance is a significant goal in the industry. |
| Novelty: The hybrid Inertial navigation system (INS) (101)has a processing system (PS) that is coupled to an inertial measurement unit (IMU) (201) and a light-pulse atom interferometer accelerometer (LPAI-ACC), where the PS and the IMU are configured to perform feed forward correction operations (FF-COs) on the LPAI-ACC. The FF-CO includes determining one of a corrected pulse duration, a shift direction, shift distance, a rotation axis, rotation direction, or rotation angle for a Raman pulse based on one of two accelerations or angular velocity. The PS generates control signal based on the pulse duration and enacting the control signal. |
| Filed: 8/9/2021 |
| Application Number: US17396902A |
| Tech ID: SD 15236.1 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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