초록 ▼

An airdata estimation and evaluation system and method, including a stable algorithm for estimating airdata from nonintrusive surface pressure measurements. The airdata estimation and evaluation system is preferably implemented in a flush airdata sensing (FADS) system. The system and method of the p

An airdata estimation and evaluation system and method, including a stable algorithm for estimating airdata from nonintrusive surface pressure measurements. The airdata estimation and evaluation system is preferably implemented in a flush airdata sensing (FADS) system. The system and method of the present invention take a flow model equation and transform it into a triples formulation equation. The triples formulation equation eliminates the pressure related states from the flow model equation by strategically taking the differences of three surface pressures, known as triples. This triples formulation equation is then used to accurately estimate and compute vital airdata from nonintrusive surface pressure measurements.

대표청구항 ▼

[ What is claimed is:] [1.]1. A flush airdata sensing (FADS) system, for use on a vehicle in a flowfield, comprising:surface mounted pressure sensors located on the vehicle for providing a surface pressure distribution;a airdata estimation system, connected to the surface mounted pressure sensors, f

[ What is claimed is:] [1.]1. A flush airdata sensing (FADS) system, for use on a vehicle in a flowfield, comprising:surface mounted pressure sensors located on the vehicle for providing a surface pressure distribution;a airdata estimation system, connected to the surface mounted pressure sensors, for estimating and evaluating airdata from the surface pressure distribution and the flow model equation, the airdata estimation system comprising:a triples formulation module that transforms the flow model equation into a triples formulation equation by using pressure quantities corresponding to the surface pressure distribution;an angle of attack module that computes an angle of attack quantity from the triples formulation equation by choosing the pressure quantities such that the angle of attack quantity is decoupled from an angle of sideslip quantity;an angle of sideslip module that computes the angle of sideslip quantity from the triples formulation equation by using the angle of attack quantity;a airdata module that estimates and evaluates airdata by using the angle of attack quantity and the angle of sideslip quantity; and,a control system computer, connected to the airdata estimation system, for adjusting an orientation of the vehicle in the flowfield from estimated and evaluated airdata.