Method for measuring repeated installation error of inertial navigation equipment
A technology of installation error and measurement method, applied in measurement devices, mechanical measurement devices, angle/taper measurement, etc., can solve the problem of difficulty in exerting the precision of inertial navigation equipment, and achieve good engineering application prospects, high precision, and wide practical range. Effect
Pending Publication Date: 2021-03-09
PLA 63698 ARMY
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Problems solved by technology
[0004] At present, the attitude accuracy of high-precision inertial navigation equipment is much higher than a few arc minutes, so it is difficult to make full use of the accuracy of inertial navigation equipment by conventional repeated installation methods. It is very necessary to measure the repeated installation accuracy of inertial navigation equipment by reference to the benchmark, which is of great significance to the use of inertial navigation equipment
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Embodiment 1
[0031] Embodiment 1, taking a kind of marine inertial navigation equipment as an example, when considering repeated installation, the horizontal accuracy of repeated installation can be ensured by the precision machining surface of the inertial navigation equipment installation base and the equipment base, and repeated installation needs to measure the inertial navigation equipment installation. For the variation of the front and rear course angles, the present invention calculates the variation of the course angle according to the principle of the small angle method, and successfully solves the problem of repeated installation of the inertial navigation equipment. details as follows:
[0032] 1. Principle of small angle method
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The invention belongs to the field of inertial navigation equipment, and discloses a method for measuring a repeated installation error of inertial navigation equipment (hereinafter referred to as inertial navigation equipment). The method comprises the following steps: acquiring a reference datum line and a reference sight line length: installing a strip-shaped block on an inertial navigation equipment installation base, wherein a straight line where one side of the strip-shaped block close to the inertial navigation equipment is located is the reference datum line, and the length of the strip-shaped block is the reference sight length; obtaining the displacement of the observation point: respectively measuring the displacement of two ends of one side, close to the strip-shaped block, ofthe inertial navigation equipment relative to the reference datum line by using a measuring tool, wherein the difference is the displacement of the inertial navigation equipment installation positionand the reference datum line; and calculating the installation angle deviation of the inertial navigation equipment relative to the reference datum line before and after disassembly by utilizing a small angle method principle, wherein the difference value is the error value of the inertial navigation equipment before and after repeated installation. According to the method, the installation errorof the inertial navigation equipment before and after repeated installation can be quantitatively calculated, the problem of repeated installation of the inertial navigation equipment is effectively solved, and the repeated installation precision is within 7 ''.
Description
technical field [0001] The invention belongs to the field of inertial navigation equipment, in particular to a method for measuring repeated installation errors of inertial navigation equipment. Background technique [0002] Inertial navigation equipment is a high-precision navigation equipment, and it is the benchmark for carrier position and attitude measurement. Traditionally, when inertial navigation equipment is used, it will not be disassembled or moved after the system is installed and calibrated, especially for marine inertial navigation equipment. The navigation equipment needs to be aligned in a specific environment in the dock, which cannot be done under the dynamic conditions of the ship. When docking or other carriers have no reference datum under static conditions, the repeated installation of inertial navigation equipment must be considered. It is necessary to find an effective means to measure the repeated installation accuracy of inertial navigation equipmen...
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Login to View More IPC IPC(8): G01B5/00G01B5/02G01B5/24
CPCG01B5/00G01B5/02G01B5/24
Inventor 魏强周勤王天云胡南
Owner PLA 63698 ARMY