On-orbit noise evaluation method of high stability temperature measurement and control system
A technology with high stability and noise evaluation, which is applied in control/adjustment system, radio wave measurement system, satellite radio beacon positioning system, etc., can solve the problem that the temperature stability of the time domain characteristic cannot be directly known to the detection performance of the controlled object influence, it is difficult to determine the source of temperature fluctuation disturbance, etc., to achieve the effect of optimizing the temperature control effect
Active Publication Date: 2021-09-24
BEIJING INST OF SPACECRAFT SYST ENG
View PDF17 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0006] In order to solve the problem that the time-domain characteristics cannot directly know the influence of temperature stability on the detection performance of the controlled object, the present invention establishes a set of on-orbit noise evaluation methods for high-stability temperature measurement and control systems, from two aspects of time domain and frequency domain progressive analysis
Among them, obtaining the frequency domain influence of temperature changes can judge whether the temperature measurement noise will have an adverse effect on the detection performance of the controlled object; in addition, the frequency domain analysis results can effectively solve the problem that it is difficult to determine the source of temperature fluctuation disturbance in time domain analysis, through The frequency domain peak value determines the disturbance frequency, assists in determining the disturbance source, conducts targeted thermal control design and improvement, and optimizes the temperature control effect
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0019] The present invention and its implementation effects will be described in detail below in conjunction with the accompanying drawings.
[0020] In this implementation example, the research object is the pilot test satellite of gravitational wave application technology, the orbit height of the satellite is 630Km, the local time of descending node is 10:30, and the orbit is sun-synchronous orbit, such as figure 2 shown. The controlled objects of the satellite are laser interferometer and accelerometer, and the temperature control stability is required to be better than ±50mk. In order to achieve high stability temperature control, four-wire platinum resistance components are used for temperature measurement components, and high stability temperature measurement and control equipment is used, including 1 temperature measurement and 2 temperature control PCB boards, which are finally installed on the stack in the star in the combination.
[0021] After the satellite was s...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to an on-orbit noise evaluation method of a high-stability temperature measurement and control system, which is used for noise evaluation of the temperature measurement and control components in the high-stability temperature measurement and control system during on-orbit flight. The invention solves the problem that the original time-domain temperature evaluation standard is no longer applicable due to the narrow range of temperature fluctuations and the influence of temperature measurement noise under the condition of high-stability thermal control requirements, and belongs to the spacecraft thermal control technology field. The present invention includes time-domain analysis and evaluation and frequency-domain analysis and evaluation. The time-domain evaluation is based on the mean and variance in statistical methods to describe the deviation of data under normal distribution; the frequency-domain evaluation system is based on Fourier transform, and The power spectral density (PSD) curve in the frequency domain is obtained to describe the distribution of noise energy in each frequency band, so as to evaluate the influence of temperature noise on other measurement systems in the frequency domain.
Description
technical field [0001] The invention belongs to the technical field of spacecraft thermal control, and relates to an evaluation method for on-orbit noise of a high-stability temperature measurement and control system. Background technique [0002] The high-stability thermal control technology is based on the specific load requirements and engineering practical application of the gravitational wave space detection technology test satellite. It is difficult for the current thermal control technology to achieve a frequency between 0.1mHz and 0.1Hz, 1mK / Hz 1 / 2 A new thermal control technology proposed within the temperature control accuracy. Its function is to meet or exceed the temperature stability control requirements of the temperature control target through high-precision temperature measurement technology, multi-stage thermal insulation passive thermal stabilization technology and PID's refined temperature control algorithm, so as to meet the gravitational wave space detec...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G05D23/20G01C21/16G01J3/45G01S19/47
CPCG01C21/165G01J3/45G01S19/47G05D23/20
Inventor 魏然周宇鹏赵欣童叶龙
Owner BEIJING INST OF SPACECRAFT SYST ENG