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Strapdown inertial navigation system support device

An inertial navigation system and support device technology, applied in the field of strapdown inertial navigation system support devices, can solve the problems of unreal acceleration signal measurement, affecting navigation accuracy and the like

Pending Publication Date: 2018-09-04
TIANJIN UNIV OF TECH & EDUCATION TEACHER DEV CENT OF CHINA VOCATIONAL TRAINING & GUIDANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the navigation process, if the three stable axes of the platform rotate relative to the inertial space (that is, the platform drifts), the measurement direction of the accelerometer also rotates accordingly, and the output signal of the accelerometer does not reflect the three axes of the inertial space. The real acceleration in the direction of the coordinate axis (there is a deviation angle), and in the navigation calculation, the output signal of the accelerometer is still calculated as the acceleration on the three axes of the inertial space, so the drift of the platform causes the acceleration The signal measurement is untrue, and the application of the acceleration signal that produces errors to carry out navigation calculations will inevitably affect the navigation accuracy

Method used

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  • Strapdown inertial navigation system support device
  • Strapdown inertial navigation system support device
  • Strapdown inertial navigation system support device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A strapdown inertial navigation system support device includes a bottom plate 1, a rear plate 2, a side plate 3 and a support base 4. The rear plate and the side plate are respectively arranged vertically on the bottom plate, and a 90 degree angle is formed between the rear plate and the side plate. The included angle forms an L-shaped semi-enclosed structure. A support base is arranged inside the L-shaped semi-enclosed structure. A first gyroscope mounting groove 4-1 is provided on the upper end of the support base. The bottom surface of the first gyroscope mounting groove and the bottom plate In parallel, a through second gyroscope mounting groove 4-2 is provided on the side of the support base away from the rear plate. The inner end of the second gyroscope mounting groove is perpendicular to the bottom plate, and a through second gyroscope mounting groove 4-2 is provided on the side of the support base near the side plate. Three gyroscope mounting slots 4-3. The inner ...

Embodiment 2

[0043] On the basis of embodiment 1, a U-shaped groove 3-3 is provided in the middle of the side plate. The width of the U-shaped groove is 1-2cm wider than the gyroscope installed in the third gyroscope installation groove, which serves as an auxiliary It has a fixed role and provides space for the installation and disassembly of the gyroscope.

Embodiment 3

[0045] When the strapdown inertial navigation system support device described in Embodiment 1 is applied to an aircraft, the entire inertial navigation device consists of a support base, two side panels, a bottom plate, three gyroscopes, three accelerometers, and three Group circuit board composition. In order to ensure the compact structure of the support device, a set of orthogonal planes are formed on the outside of the support base, three gyroscopes are placed, and the interior is hollowed out to form a second set of orthogonal planes inside, and three accelerometers are placed; The gyroscope is used to form a navigation coordinate system so that the measurement axis of the accelerometer is stabilized in the coordinate system and gives the heading and attitude angle; the accelerometer is used to measure the acceleration of the moving body through an integral over time to obtain the speed, and then the speed passes through One time integration of time can get the distance. ...

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Abstract

The invention discloses a strapdown inertial navigation system support device which comprises a bottom plate, a back plate, a side plate and a support seat, wherein an L-shaped half-surrounded structure is adopted for the device, so as to provide a reasonable space for the mounting of a gyroscope, an accelerometer and a circuit board; a convex edge arranged on the bottom plate is aligned to and inlaminated contact with one side of the support seat, and the convex edge is used for providing protection and supporting for the support seat; a U-shaped groove is formed in the middle of the side plate on the bottom plate, and the U-shaped groove plays an assisted fixing role for the gyroscope close to one side of the side plate and provides space for the mounting and dismounting of the gyroscope; an accelerometer mounting inner slot is formed in the support seat, so as to provide a closed spaced for the accelerometer, and play a steady supporting role; and the mounting errors of the gyroscope and the accelerator are reduced due to the design and production of the whole machine parts.

Description

Technical field [0001] The invention belongs to the technical field of mechanical engineering, and specifically relates to a strapdown inertial navigation system support device. Background technique [0002] Strapdown inertial navigation system is to fix the inertial elements, gyroscope and accelerometer directly on the carrier. The gyroscope and accelerometer respectively measure the three angular velocities and three linear accelerations of the carrier relative to the inertial space along the carrier coordinate system After coordinate transformation, the acceleration information is transformed into acceleration along the navigation coordinate system. After calculation, various navigation information such as the position, speed, heading and horizontal attitude of the carrier are obtained. [0003] To maintain the stable operation of the inertial navigation system, the indispensable structure is the support device. The support device passes through three stable loops to keep the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/18
CPCG01C21/18
Inventor 袁也关志伟袁名伟杜峰张宇何俊龙张心怡赵洪林李俊凯李琦
Owner TIANJIN UNIV OF TECH & EDUCATION TEACHER DEV CENT OF CHINA VOCATIONAL TRAINING & GUIDANCE
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