Monitoring and processing method for pressure faults of embedded air data system

Abstract

The invention belongs to the technical field of embedded air data systems for aerospace vehicles, provides a monitoring and processing method for pressure faults of an embedded air data system, and aims to solve the problem of system final fault caused in case of pressure hole blockage, pipeline leakage, pressure sensor faults, acquisition and processing circuit faults, signal transmission faults and the like occurred in an FADS, or the problem of parameter operation divergence which finally causes impacts on flight control. A correlation matrix among pressure spots is determined by using a wind tunnel test and flight test data according to the distribution of pressure holes, and the correlation matrix is pre-assembled in the FADS; fault location is performed through a finally obtained pressure value, the pressure value of a fault point is estimated by using a least squares curve fitting method, and the pressured value obtained through evaluation is used for participating follow-up operation. The embedded air data system pressure fault monitoring and processing method provided by the invention can effectively process pressure hole blockage, pipeline leakage, pressure sensor faults, processing circuit faults, signal transmission faults, pressure value fault and the like, can provide reasonable atmospheric parameters to a mobile system, and can effectively improve the practicability of an embedded air data system.

Description

technical field [0001] The invention belongs to the technical field of air vehicle embedded air data systems, and in particular relates to a pressure fault monitoring and processing method of an embedded air data system. Background technique [0002] Embedded Air Data Sensing System (FADS), as an advanced air data system, senses the flow characteristics through a set of pressure holes embedded in the surface of the aircraft, and then calculates the pressure and finally obtains the pressure altitude, indicated airspeed, Mach Atmospheric parameters such as number, lift speed, angle of attack, sideslip angle, etc. Compared with the traditional air data system (ADS), FADS has many potential advantages such as high integration. When the aircraft has high speed and stealth requirements, FADS has irreplaceable advantages. With the rapid development of the aviation industry, the application of FADS has been widely used in recent years. [0003] Although the FADS system has many ad...

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the problems such as blockage of the pressure measuring hole, pipeline leakage, pressure sensor failure, collection and processing circuit failure, and signal transmission error in the embedded air data sensing system (FADS), which lead to the final failure of the system; or are caused by special air flow environment. The instantaneous value of the measurement or the measurement is invalid, causing the divergence of the parameter calculation, and finally affecting the flight control problem. A method for monitoring and processing the pressure fault of the embedded air data system is provided.

Images