[Reports] / Amer.inst.of aeronautics and astronautics. N 89-2584 : Estimating in-flight engine performance variations using Kalman filter concepts : Rep. presented at the AIAA/ASME/SAE/ASEE 25th joint propulsion conf., July 10-12, 1989, Monterey(Ca) / R.H.Luppold,J.R.Roman,G.W.Gallops,L.J.Kerr, 1989. - 9 p. - Текст : непосредственный.