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Strapdown inertial navigation computer testing system and realization method

A strapdown inertial navigation and test system technology, applied in the field of strapdown inertial navigation computer test system, can solve the problems of non-reproducible test results, high cost, resource consumption, etc., so as to improve reliability and reproducibility, The effect of saving test costs and improving versatility

Inactive Publication Date: 2017-06-13
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0005] Aiming at the problems that the traditional navigation computer test has low versatility and flexibility, the test results cannot be reproduced, and the dynamic test consumes resources and high cost, the present invention proposes a strapdown inertial navigation computer test system and its implementation method, through The track simulation reverses the theoretical output of the inertial sensor, and the theoretical output is used as the data source of the analog interface after adding errors
The invention can set the inertial sensor output under different dynamics, which solves the problem that the pure digital simulation method cannot verify the reliability of the system

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  • Strapdown inertial navigation computer testing system and realization method

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Embodiment Construction

[0039] The invention will be described in further detail below in conjunction with the accompanying drawings.

[0040] A schematic diagram of the system structure of a strapdown inertial navigation computer performance test of the present invention is as follows figure 1 As shown, its specific implementation steps are as follows:

[0041] Step 1. Select the Microsoft Visual C++ development platform on the computer to design the host computer software. Through the software to set the motion track parameters and inertial sensors and their interface parameters, the method is as follows:

[0042] (1) Set the movement duration of the carrier, that is, the track simulation time. The alignment time is included in the track simulation time, which is used for later alignment with the data returned by the navigation computer;

[0043] (2) Set the trajectory parameters of the carrier movement. The trajectory parameters include the carrier's position, velocity, attitude, linear accele...

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Abstract

The invention relates to a strapdown inertial navigation computer testing system and a realization method, and belongs to the field of navigation equipment testing. A semi-physical testing platform is constructed in a manner of simulating a hardware interface of an inertial sensor, the theoretical output of the inertial sensor is reversely derived by track simulation, and real device output is simulated in a manner of adding an error to the theoretical output as a data source of an analogue interface. The data format and the data accuracy of the output of the simulated inertial sensor are regulated by flexible parameter setting means, and differences between the position, the speed and the attitude, which are calculated by navigation, and a set track are compared and analyzed by virtue of a mathematical statistical method for a tester to conveniently test the performance of a navigation computer and realize evaluation and verification of the performance of software and hardware of a navigation computer system. According to the system and the method, hardware interface and software algorithm tests can be made for different types of navigation computers and different dynamic requirements, so that the testing cost is reduced, and the testing universality and the reproducibility are improved.

Description

technical field [0001] The invention relates to a strapdown inertial navigation computer testing system and a realization method, belonging to the field of navigation equipment testing. Background technique [0002] The inertial navigation system can continuously provide navigation parameters such as attitude, speed and position, has high short-term accuracy and good stability, and has a wide range of applications. The main disadvantage of the inertial navigation system is that the navigation positioning error accumulates over time, and the navigation error is mainly determined by the accuracy of the inertial sensor, the accuracy of the navigation algorithm, and the dynamic characteristics of the vehicle. With the advancement of science and technology, inertial navigation and guidance technology has become the core technology in the fields of aviation, aerospace and navigation, and its development level has also become an important yardstick for measuring a country's nationa...

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Application Information

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IPC IPC(8): G01C25/00
Inventor 赵伟季国田赖际舟曾庆化邢丽陈维娜刘建业
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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