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System and method for computing Mach number and true airspeed

A Mach number and vacuum technology, applied in the direction of using electric/magnetic methods, calculations, and measuring fluid velocity by using differential pressure, etc., can solve problems such as inoperability of pitot static sensors, inappropriate aircraft operation, and unreliability

Inactive Publication Date: 2015-02-11
HONEYWELL INT INC
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AI Technical Summary

Problems solved by technology

ADC and pitot sensors typically include redundancy for high reliability, however, failures can still occur resulting in improper aircraft operation
[0003] despite these multiple redundancies, maintenance safety, damage avoidance on the ground or in flight, and many pre-flight checks, there is still a chance of a pitot static sensor being inoperable
Also, normally highly reliable ADCs can become unreliable, providing incorrect information

Method used

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  • System and method for computing Mach number and true airspeed
  • System and method for computing Mach number and true airspeed
  • System and method for computing Mach number and true airspeed

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Embodiment Construction

[0039] The following detailed description is merely illustrative in nature and is not intended to limit the subject matter or the embodiments of the application and uses of such embodiments. Any implementation described herein as exemplary is not necessarily to be construed as preferred or advantageous over other implementations. Furthermore, there is no intention to be bound by any expressed or implied theory presented in the preceding technical field, background, brief summary or the following detailed description.

[0040] Techniques and techniques may be described herein in terms of functional and / or logical block components and with reference to symbolic representations of operations, processing tasks, and functions that can be performed by various computing components or devices. Such operations, tasks, and functions are sometimes referred to as computer-implemented, computerized, software-implemented, or computer-implemented. In practice, one or more processor devices ...

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Abstract

A system and method are provided for calculating Mach number and true airspeed without reference to data from a pitot static sensor. The true airspeed and Mach number are calculated using the altitude information from GPS, IRS, Radio Altimeter and other onboard sensors other than the air data computer (ADC). The computed true airspeed or Mach number could be used to confirm the ADC information, or in lieu of the ADC information when the ADC information is unreliable or unavailable.

Description

technical field [0001] The exemplary embodiments described herein relate generally to calculating MACH number and true airspeed and more particularly to calculating MACH number and true airspeed when pitot tubes are unavailable or inoperable. Background technique [0002] Measurement, calculation and display of true airspeed (TAS), MACH number (MN) and / or calibrated airspeed (CAS) as well as altitude enable the pilot to maintain a recommended safe airspeed. Typically, these airspeeds (TAS, MN, CAS) and altitude are provided by an air data computer (ADC) that receives the relevant information from the pitot static sensor. ADC and pitot sensors typically include redundancy for high reliability, however, failures can still occur resulting in improper aircraft operation. [0003] Despite these multiple redundancies, maintenance safety, damage avoidance on the ground or in flight, and numerous pre-flight checks, there is still a chance of inoperability of the pitot static sensor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
CPCG01P5/16G01P3/50G01P13/025G01P5/175G01P21/025G01P3/62B64D43/02G01C23/00G01P21/00
Inventor V.T.纳桑T.阿南达潘J.希利耶
Owner HONEYWELL INT INC
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