Method for determining initial attitude angle of aircraft

A technology of initial attitude angle and determination method, which is applied in the directions of instruments, satellite radio beacon positioning systems, measurement devices, etc. Effect

Active Publication Date: 2013-01-30
BEIJING AEROSPACE AUTOMATIC CONTROL RES INST +1
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Problems solved by technology

[0004] Use GPS to measure the attitude, and use the GPS carrier phase to determine the attitude in the air. Since this method requires more than two antennas to determine the attitude, and the baseline length must have a certain distance, this method is generally

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  • Method for determining initial attitude angle of aircraft
  • Method for determining initial attitude angle of aircraft

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Embodiment Construction

[0023] The present invention will be further introduced below in conjunction with the accompanying drawings.

[0024] After the small aircraft is powered on in the air, it cannot obtain the initial attitude information of the projectile body, and needs to determine the attitude in the air through the control system. Since the GPS can obtain the three-way velocity v in the North East sky coordinate system N , v U , v E . With the improvement of the device level, the calculation speed and data refresh rate of GPS receivers are also continuously improved. At present, the data refresh rate of GPS receivers can reach 10-100Hz. Generally speaking, the positioning speed deviation of GPS receivers is very small, about 0.2m Within / s, the present invention utilizes the relatively accurate characteristics of the positioning relative speed of the GPS receiver to obtain initial pitch attitude angle and yaw attitude angle information. The initial roll attitude angle information will ine...

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Abstract

The invention discloses a method for determining an initial attitude angle of an aircraft, and the method comprises the following steps of: calculating a pitch attitude angle and a yawing attitude angle psi according to speed information obtained by a GPS (Global Positioning System) receiver; obtaining geomagnetic information My1 and Mz1 by virtue of a double-shaft geomagnetic sensor; and calculating a rolling attitude angle gamma according to the formula shown in the specification, wherein alpha and beta are a magnetic declination angle and a magnetic inclination angle of the current position of the aircraft, respectively. The method, provided by the invention, is low in cost, simple and high in precision, and can be used for realizing the air attitude measurement of a small aircraft.

Description

technical field [0001] The invention relates to a method for determining an attitude angle. Background technique [0002] After the small high-dynamic aircraft (hereinafter referred to as the aircraft) is powered on in the air, the navigation system needs to independently identify the initial attitude information and complete the attitude determination in the air before subsequent navigation calculations can be performed. However, due to the characteristics of high overload and small volume, the attitude determination of the aircraft in the air can only be completed by MEMS devices. However, MEMS inertial devices have disadvantages such as large drift and low precision. [0003] At present, domestic articles use the geomagnetic method for aerial attitude recognition. For example, Cao Hongsong of North University of China and others proposed a geomagnetic sensor chip and a silicon micro-gyroscope to construct a low-cost attitude detection system, which can obtain higher-pre...

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Application Information

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IPC IPC(8): G01S19/53G01C21/08
Inventor 施国兴巩庆海吕新广孙友
Owner BEIJING AEROSPACE AUTOMATIC CONTROL RES INST
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