Patent ID: 8930062
Filing Date: 2015-01-06
Classification: B60T,B64G,G01D,G01L,G01M,G01P,G05B

Abstract:
1. A method for detecting and isolating faults in pressure ports and pressure transducers of a pressure sensing system, comprising: distinguishing pressure port blockage failures from pressure transducer failures by cross comparison of surface pressures measured at a plurality of pressure ports; determining whether the measured surface pressures lie within a desired range to a coarse level at a specific instant of flight phase; checking constant pressure and rate on the measured surface pressures to identify full or partial blockage in said plurality of pressure ports and sudden failures on a plurality of pressure transducers; generating one or more structured sets of angle of attack and sideslip angle estimates from predefined combinations of said plurality of pressure ports lying along a vertical and horizontal meridians of a vehicle nose cap; and detecting and isolating the faults in said plurality of pressure ports and said plurality of pressure transducers in the vertical and horizontal meridians based on said one or more structured sets of angle of attack and sideslip angle estimates.