Aerospace Instrument-Making Annotation << Back ADJUSTMENT OF THE INTEGRATED RADIO INERTIAL CONTROL SYSTEM FOR LOW-ALTITUDE FLIGHT CONDITION O.A. Frolova Using mathematical simulation methods the UAV integrated altimeter was investigated and adapted for real operation condition. A strategy and logic for the integrated adaptive altimeter operation is suggested; feasibility for the underlying surface parameter in-flight estimation is investigated; the Kalman filter with enhanced error protection is adjusted for the UAV operation conditions; procedures and logic are developed for bias stability error estimate use in the determined elevation altitude setting calculation under the radio altimeter failure. Keywords: Uninhabited air vehicle (UAV), control system, inertial navigation system, radio altimeter, data protection, Kalman filter. E-mail: kseniy_frolova@mail.ru