CN-121977522-A - Autonomous measurement system during extraterrestrial planet

CN121977522ACN 121977522 ACN121977522 ACN 121977522ACN-121977522-A

Abstract

The invention discloses an autonomous measurement system for extraterrestrial planet time, which comprises a precise ring control cabin, an ultra-high precision fiber optic gyroscope, a precise atomic clock, a zenith instrument and a comprehensive information processor. The precise ring control cabin provides stable operation conditions for the system under the extreme environment of the extraterrestrial planet through a high-precision temperature control and two-stage vibration isolation technology, the ultra-high precision optical fiber gyroscope senses the rotation angular velocity of the planet in real time, the precise atomic clock provides a high-stability time reference, the zenith instrument establishes an absolute angle reference by observing a star, zero offset calibration is carried out on the optical fiber gyroscope, the comprehensive information processor synchronously acquires data of the gyroscope and the atomic clock, and the calibration information of the zenith instrument is fused, so that the extraterrestrial planet with high precision is finally solved. The invention effectively overcomes the problems of precision attenuation and zero drift of the measuring device in an underground complex environment, realizes high-precision, autonomous and long-term stable measurement in the planetary process, and provides a key space-time reference for tasks such as orbit determination, deep space exploration and the like of a spacecraft.

Inventors

MIAO YINXIAO
DOU CHEN
WANG ZHE
WANG CHUNXI
XIONG KUN
Ju Longjian
Ning Tianlei
TANG SHENGQUAN
Xu Xihang
Shou Yang

Assignees

北京航天计量测试技术研究所

Dates

Publication Date: 20260505
Application Date: 20251121

Claims (7)

1. An extraterrestrial planetary autonomous measurement system, comprising: The precise environmental control cabin is used for providing a stable operation environment for each component of the system under the extremely abnormal temperature, air pressure and radiation illuminance environment of the extraterrestrial planet; the ultra-high precision optical fiber gyroscope is used for sensing the planetary rotation angular speed in real time; a precision atomic clock for providing a time reference for the system; the zenith instrument is used for carrying out zero offset calibration on the optical fiber gyroscope; and the comprehensive information processor is used for monitoring the environmental condition of the precise environmental control cabin, synchronously collecting the angular velocity data of the optical fiber gyroscope and the time information of the precise atomic clock, and carrying out zero offset compensation on the optical fiber gyroscope based on the observation data of the zenith instrument so as to calculate the extraterrestrial planet time.
2. The system of claim 1, wherein the precision environmental chamber comprises: the temperature regulation and control module adopts a thermistor with temperature measurement precision not lower than 0.05 ℃ and a high-precision temperature controller, and combines self-adaptive control Wen Suanfa to control the temperature in the cabin within the range of (30+/-1) °c, and the temperature stability is better than 0.1 ℃ per hour; the vibration isolation device comprises a primary vibration isolation system and a secondary vibration isolation system, wherein the primary vibration isolation system adopts a low-frequency air floatation supporting column and a platform, and the secondary vibration isolation system is arranged in vacuum environment simulation equipment to jointly form a high-stability test platform.
3. The system of claim 1, wherein the ultra-high precision fiber optic gyroscope comprises: the zero offset stability of the high-precision measuring module is better than the magnitude of 10 -6 degrees/h (1 h,1 sigma); And the real-time data acquisition and processing unit is used for acquiring the planetary rotation angular speed data in real time and synchronously transmitting the planetary rotation angular speed data to the comprehensive information processor.
4. The system of claim 1, wherein the precision atomic clock comprises: The high-stability time-frequency output module has the frequency stability of 10 -13 orders of magnitude; and the remote calibration module supports remote time calibration based on GNSS, and realizes synchronization with the earth time system.
5. The system of claim 1, wherein the zenith instrument comprises: The optical observation module has the capability of detecting 10-12 equal stars and is used for acquiring the position information of the star in the celestial sphere reference system; and the angle reference establishing module is used for establishing an angle reference based on the position information and carrying out zero offset calibration on the optical fiber gyroscope.
6. The system of any of claims 1-5, wherein the integrated information processor comprises: the environment monitoring unit is used for monitoring the temperature and vibration parameters in the precise environmental control cabin in real time; The data synchronous acquisition unit is used for synchronously acquiring angular velocity data of the optical fiber gyroscope and time information of the precision atomic clock; the zero offset calibration unit is used for receiving the observation data of the zenith instrument and carrying out zero offset compensation on the optical fiber gyroscope; And the planet time calculating unit is used for matching the integrated angle information with the world coordination time and calculating the extraterrestrial planet time.
7. The system according to claim 6, wherein the planetary time calculation unit calculates the planetary solar time precision by comparing the integration time of the hydrogen atomic clock with the world coordination time, and outputs the extraterrestrial planetary time parameter.

Description

Autonomous measurement system during extraterrestrial planet Technical Field The invention belongs to the technical field of inertial measurement, photoelectric detection and time frequency measurement intersection, in particular relates to an extraterrestrial planet time autonomous measurement system, which can solve the problems of extraterrestrial planet inertial rotation parameter measurement, satellite time autonomous measurement and the like and provides technical support for space reference establishment and maintenance in spacecraft orbit determination butt joint and deep space detection tasks. Background In an extraterrestrial planet detection task, accurate measurement during the planet is a key basis for realizing precise space operation such as orbit determination and docking of a spacecraft, deep space detection, space reference establishment and maintenance, and the like, and the measurement during the planet depends on accurate acquisition of planet inertial rotation parameters. The factors such as substances in the planet and atmospheric circulation can cause weak change of the rotation speed of the planet, and the tiny change can influence accurate measurement during the planet, so that the measurement work is challenged. At present, the optical gyroscope is used for monitoring the related geophysical effects such as the earth rotation motion and the like, the ring laser gyroscope developed by Stedman teaching of the university of Canterburgry in New Zealand is a gyroscope for measuring the earth rotation at the first place in the world, the thought of measuring the earth rotation parameters by using the gyroscope is lifted, and the sensitivity of the optical fiber gyroscope is continuously improved along with the development of optical fiber technology. Related researches are also carried out in China, the university of Changan uses a high-precision magnetic suspension gyroscope to realize the measurement of the earth parameters, the national time service center of China academy of sciences comprehensively describes the method for measuring the earth by using the fiber-optic gyroscope, and the like, but the researches still have the defects in noise suppression, error consideration and other aspects and have a certain gap from the international advanced level. The conventional measurement method in planetary time has a plurality of problems when facing to the complex environment outside the ground. For example, part of the measuring devices are greatly influenced by environmental factors, measurement errors are easily introduced under the coupling conduction of space environment excitation and geological movement, meanwhile, the measuring devices can have zero drift and other problems when operated for a long time, the single calibration mode is difficult to ensure long-term stability of measurement precision, and the requirements of extraterrestrial planetary detection on measurement in the process of high-precision and autonomous planetary detection are difficult to meet. In view of the foregoing, there is a need in the field of measurement in the extraterrestrial planet at present for a system that can adapt to a complex extraterrestrial environment, effectively inhibit various errors, and implement a high-precision and autonomous measurement system, so as to provide a powerful technical support for extraterrestrial planet exploration when accurately acquiring the inertial rotation parameters of the planet and the planet. Disclosure of Invention The invention provides an autonomous measurement system for an extraterrestrial planet, which aims to solve the technical problems of poor environmental adaptability, insufficient error suppression, limited calibration precision and the like in the existing extraterrestrial planet measurement, and realizes efficient, real-time, accurate and autonomous measurement of planet inertial rotation parameters and the planet. In order to solve the technical problems, the invention provides the following technical scheme: An extraterrestrial planetary autonomous measurement system comprising: The precise environmental control cabin is used for providing a stable operation environment for each component of the system under the extremely abnormal temperature, air pressure and radiation illuminance environment of the extraterrestrial planet; the ultra-high precision optical fiber gyroscope is used for sensing the planetary rotation angular speed in real time; a precision atomic clock for providing a time reference for the system; the zenith instrument is used for carrying out zero offset calibration on the optical fiber gyroscope; and the comprehensive information processor is used for monitoring the environmental condition of the precise environmental control cabin, synchronously collecting the angular velocity data of the optical fiber gyroscope and the time information of the precise atomic clock, and carrying out zero offset compensation on the optical f