Optimum aiding of inertial navigation systems using air data

Observability Analysis and Concept of Usage of Air Data Attitude and Heading Reference Systems (AD-AHRS)

“…Here v W n and a W n are wind speed and acceleration vectors, respectively. Equation (1) extended by the wind model (2) will further be addressed as navigation equations and referred to as (3). The random ramp wind model is meant for analytical investigation, whereas a random constant should be preferred for filter implementation.…”

“…Dedicated publications on integration of an ADS with other systems are References [3][4][5][6][7][8]. The work in [3] seems to be the earliest published attempt to aid an INS using airspeed information. Furthermore, works [4,5] suggest an alternative method of roll and pitch computation under the assumption of an aircraft moving at constant velocity while maintaining zero angles of attack and sideslip.…”

“…A tactical-grade IMU, reference model NG LITEF μIMU [10]. 3. An automotive-grade IMU, reference model Analog Devices ADIS16362 [11].…”

“…Moreover, Groves states that air data system (ADS) measurements are a poor source of information on speed relative to ground and are therefore not widely used for navigation. Dedicated publications on integration of an ADS with other systems are References . The work in seems to be the earliest published attempt to aid an INS using airspeed information.…”