Dynamically rotary modulated north-seeking method for gyroscope

A technology of dynamic rotation and gyroscope, applied in the direction of rotation gyroscope, Sagnac effect gyroscope, etc.

Inactive Publication Date: 2012-12-26
西安测绘研究所
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Problems solved by technology

Based on the above situation, it shows that the domestic research on the continuous rotation modulation north-seeking method is still in the exploratory stage, and there are more introductions to its principles, but less systematic research on it

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  • Dynamically rotary modulated north-seeking method for gyroscope
  • Dynamically rotary modulated north-seeking method for gyroscope
  • Dynamically rotary modulated north-seeking method for gyroscope

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Embodiment Construction

[0077] The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0078] Below will be described in detail in conjunction with embodiment:

[0079] like figure 1 As shown, this is a schematic diagram of the main engine structure of the north finder; the northeast sky coordinate system (OXnYnZn) (n system) is set; the Xb axis of the rotating table body coordinate system (OXbYbZb) (b system) points to the zero position of the grating (this is used as the zero position of the turntable position), the Yb axis points to the 90° direction of the grating, and the Zb axis points to the rotation axis; the Xm axis of the gyro measurement coordinate system (OXmYmZm) (m system) points to the accelerometer 1, the Ym direction points to the accelerometer 2, and the Zm axis points to the rotation axis; the local The geographic latitude is L; the pitch / roll / yaw angles of the north finder body are θ, γ, φ respectively.

[0080] W...

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Abstract

The invention belongs to the field of an inert measuring technique or geophysical experiment and instrument, in particular to a dynamically rotary modulated north-seeking method for a gyroscope. The dynamically rotary modulated north-seeking method for the gyroscope provided by the invention aims to realize fast and precise north-seeking measurement under the condition that a carrier has a large attitude angle without leveling or knowing the latitude of a measuring point, so that the speed of geodesic operation is improved. A rotary table which rotates uniformly at an angular speed Omega is used. The rotary table is provided with the gyroscope and two accelerometers. The method comprises the steps of: first, solving an angle of pitch and a roll angle by the two accelerometers; then, solving the geographic latitude L and a course angle by the gyroscope; and after calculating an initial value, improving the precision by using a real time recursive least square method. The dynamically rotary modulated north-seeking method for the gyroscope provided by the invention has the advantages that fast and precise north-seeking measurement can be realized under the condition without leveling or knowing the latitude of the measuring point, so that the speed of geodesic operation is improved.

Description

technical field [0001] The invention belongs to the field of inertial measurement technology or geophysical experiments and instruments, and mainly relates to a dynamic rotation modulation gyroscope north-finding method. Background technique [0002] Chinese patent application CN90103687.0 discloses a kind of north finder invented by the 15th Institute of the First Design and Research Institute of the Ministry of Aeronautics and Astronautics of my country. The north finder uses a flexible gyroscope and an accelerometer installed on the turntable as the detection components. The components of the earth's rotation angular velocity at multiple positions are detected by the flexible gyroscope. Combined with the output of the accelerometer at the same position, the solution Calculate the angle between the initial position and the north direction. A stepper motor is used to drive the turntable to rotate to realize the sampling of multiple measurement positions. In the drive of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C19/38G01C19/72
Inventor 白云超田育民刘思伟陈炜马小辉王成宾李瑞锋高扬
Owner 西安测绘研究所
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