True airspeed reconstruction strategy for unmanned aerial vehicle

A machine vacuum and strategy technology, which is applied in the field of aircraft flight control system, can solve the problems of less technical involvement and achieve the effect of ensuring effectiveness

Active Publication Date: 2015-08-26
SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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Problems solved by technology

[0004] In related technologies, such as "Design of Air Velocity Measurement System for Unmanned Aerial Vehicles Based on Single-chip Microcomputer", the true air speed mostly adopts single-chip microcomputer technology combined w

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  • True airspeed reconstruction strategy for unmanned aerial vehicle
  • True airspeed reconstruction strategy for unmanned aerial vehicle
  • True airspeed reconstruction strategy for unmanned aerial vehicle

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Embodiment Construction

[0020] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated.

[0021] The reconstruction strategy of the true air speed of the UAV in the present invention includes obtaining the static temperature of the atmosphere and obtaining the Mach number, and according to the formula Calculate the true speed of the UAV, in the formula, V t is the true air speed, T s is the static temperature of the atmosphere, and M is the Mach number, including the following two situations:

[0022] When the Mach number fails, the Mach number is reconstructed according to the GPS east speed, north speed, sky speed and GPS altitude:

[0023] M = V 2 ...

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Abstract

The invention provides a true airspeed reconstruction strategy for an unmanned aerial vehicle. Under two conditions that a mach number fails and a total temperature sensor fails, true airspeed reconstruction is performed in different ways; when the mach number fails, the mach number reconstruction is performed according to the eastward speed, the northward speed and the skyward speed of a GPS and the GPS height; when the total temperature sensor fails, the true airspeed is directly obtained by look-up of a mach number and air pressure altimeter or the true airspeed is reconstructed according to the eastward speed, the northward speed and the skyward speed of the GPS. The true airspeed information validity is ensured, and the true airspeed is calculated by fully utilizing atmosphere data information and GPS data information.

Description

technical field [0001] The invention belongs to the technical field of aircraft flight control systems, and in particular relates to a reconfiguration strategy of the true air speed of an unmanned aerial vehicle. Background technique [0002] True speed refers to the real speed of the aircraft when it moves relative to the air, and it is an important parameter for the safe flight of the aircraft. Accurate true air speed data information plays a considerable role in improving flight safety, accuracy and economy. When the aircraft is moving relative to the air, the aircraft can be regarded as stationary according to the relativity of motion, and the air flows through the aircraft at the same flow rate and opposite direction. True air speed cannot be measured directly, but can only be calculated indirectly based on atmospheric static pressure and dynamic pressure. [0003] The true air speed cannot be directly measured by the sensor, but needs to be calculated from the measur...

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Application Information

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IPC IPC(8): G06F19/00G01P5/00
Inventor 陈纪磊曹正礼王允辉
Owner SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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