Inertial navigation testing is inseparable from the testing instrument centrifuge

[ Focus on Chemical Machinery Equipment Network ] Recently, at the construction site of the Chaoyang Junction to Shunyi section of the Beijing-Shenzhen High-speed Railway, engineers from China Railway Fifth Survey and Design Institute Group Co.
, Ltd.
and Wuhan University used a one-piece inertial integrated navigation railroad track geometry measurement Yi, conducted multiple rounds of precision survey tasks on the 49.
6 km ballasted track of the above-mentioned double-track section.
It marks the official application of the Beidou-3 satellite navigation system in the field of high-speed rail construction.

 

"Beidou Inertial Navigation Car" has a great effect
 

The Beidou inertial integrated navigation railway track geometric state measuring instrument is commonly known as the Beidou inertial navigation car.
Compared with the traditional track precision measurement method, its measurement efficiency is increased by more than 20 times.
In recent years, the scope of the satellite navigation and location service industry market has also been expanding.
It is understood that the market size reached 347.
9 billion U.
S.
dollars in 2019.
With the rapid development of smart phones supporting satellite navigation and the increasing emphasis on high-precision satellite navigation solutions in the government, commercial, military, and industrial fields, the satellite navigation market will further grow.
By 2025, the scale will reach 730 billion US dollars.

 

　　According to the editor's understanding, after the completion of Beidou-3's comprehensive network, the positioning accuracy will reach 2.
5 meters, and it will achieve higher precision positioning with the foundation enhancement system.
A good positioning effect will play an important role in industry applications.
For example, automotive intelligence is a big downstream application market for Beidou, and there are many professional markets such as precision agriculture, smart cities, surveying and mapping and other industries will use Beidou related products to meet higher requirements.
Accurate positioning and navigation requirements.

 

　　Inertial Navigation and detector is inseparable
 

　　Inertial navigation test equipment and motion simulation test equipment are both characterized by multi-axis motion, so they are referred to as turntables for short.
The inertial navigation test turntable system mainly provides accurate spatial coordinate positioning, precise angular rate and angular acceleration test benchmarks for the performance test of inertial components or navigation systems; the motion simulation turntable can generally be divided into the flight motion turntable and the target motion simulation turntable.
It is used to provide realistic carrier posture and target tracking motion simulation environment.

 

　　Inertial instrument is an extremely precise instrument.
It refers to a gyroscope characterized by the inertia of a rotating mass and an accelerometer characterized by the inertia of a translational or rotating mass in the inertial technology.
Gyroscopes and accelerometers are indispensable core measuring instruments in inertial navigation systems or inertial guidance systems, and inertial measurement devices are composed of them.
Among them, the gyroscope is used to detect the angular movement of the vehicle in the inertial space, and the accelerometer is used to detect the specific force when the vehicle is moving.
Inertial navigation test equipment is a tool for evaluating inertial instruments.
Without high-precision modern testing equipment, it is impossible to evaluate the actual working performance of the inertial instrument and determine whether it can be used, and it is impossible to provide a sufficient and reliable basis for improving the design and error compensation.

 

　　Among them, the precision centrifuge is a new type of high-precision inertial navigation test equipment that has emerged with the development of inertial technology, computer technology, material science and other high-tech developments.
It is mainly used to calibrate and identify high-sensitivity accelerometers for inertial navigation.
Since the twentieth century, with the breakthrough development of electronic technology and composite materials, the development of precision centrifuges for high-precision inertial navigation has been greatly promoted.

 

　　Development status of centrifuges at home and abroad
 

　　Foreign countries started early in the development of accelerometer test equipment.
The United States and Russia are countries with rapid development and early start of inertial technology.
Since the 1950s, these two countries have started the research and development of centrifuges, and many models have been published.
The centrifuge level of these two countries represents the * level.
The research and development of Russian centrifuges has also been carried out very early.
The main research and development units are the Mendeleev Institute of Metrology and the Moscow "Rotor" scientific research and production consortium.
The centrifuges developed in Russia are mainly divided into blue types: one is the centrifuge that produces constant acceleration; the other is the centrifuge that can produce both constant acceleration and harmonic acceleration with a reversing platform; the third is a centrifuge with a tiltable spindle Centrifuge.
The Mendeleev Institute of Metrology has a number of Russian national metrology standards, such as length benchmarks, mass benchmarks, and gravity benchmarks.
It is Russia's metrological institution.
The research level of the research institute in inertial navigation test turntables and precision centrifuges represents Russia's actual level and ability in the field of inertial technology testing.

 

　　my country started late in the development of precision centrifuges for inertial navigation, which has a certain gap with the military level.
The main units engaged in the development of precision centrifuges for inertial navigation are: Harbin Institute of Technology, Beijing Aerospace Corporation Beijing Automation Control Equipment Research Institute, Aviation Precision Machinery Research Institute, and 304 institutes.
The Second Department of the Second Academy of Aerospace Science and Industry Corporation, the 33rd Institute of Aerospace Science and Industry Corporation and the Ninth Institute of the Ministry of Nuclear Industry have introduced disc-type precision centrifuges from Russia.

 

　　There is a huge gap between China and foreign countries in realizing accurate angle measurement and calibration under high dynamic conditions.
In the future, it is necessary to actively explore the implementation schemes and calibration methods of * dynamic angle measurement engineering.
In addition, there is a big gap between the precise design and realization of structural rigidity under heavy load and high dynamic conditions and the advanced level.
It is also necessary to actively explore the optimization and realization of the material, design, processing and assembly of large-scale structures.
There are also gaps in comprehensive performance including reliability, safety, electromagnetic compatibility, etc.
, and the mechanism of influencing factors should be actively explored and the basic capabilities of manufacturing technology should be improved.

 

　　The development prospects of centrifuges
 

　　In summary, the development of domestic centrifuge technology started late, and many production technologies rely on foreign imports, and the development speed is very slow.
Although in recent years, with the support of national policies, scientific research institutions have accelerated the pace of centrifuge technology research and development, the centrifuge companies themselves still invest little in centrifuge technology, and the innovation of centrifuge technology is slow.
The gap is still large.

 

　　With the rise of the Chinese centrifuge brand, the enterprises that represent the good technology of centrifuges have accelerated their pace of entering the world trade, and the trade trend of centrifuges has become more and more rapid.
This is due to our innovation in centrifuge technology.
Experts predict that the centrifuge will have a major change in the next five years.
The main change is not in technology, but the integration of market size, market sales system, management system and other aspects.

 

　　The development trend of the foreign centrifuge market is intelligence, convenient control, liberating the labor of the operators, and at the same time helping to promote the exchange of various export marketing communication strategies and customer cultivation technology booths.
In the future, domestic enterprises will also put new centrifuge design concepts into production as soon as possible, and develop more new centrifuges on the market, so as to truly solve the separation requirements of large enterprises and provide effective solutions.
At the same time, there will be high economic benefits to enhance the image of China's centrifuge field.

 

　　Original title: Inertial navigation testing is inseparable from the detection instrument centrifuge "show its skills"