Spacecrafts & Technologies最新文献

Precision space telescope attitude determination and control system design principles 精密空间望远镜姿态确定和控制系统设计原理

Spacecrafts & Technologies Pub Date : 2023-12-31 DOI: 10.26732/j.st.2023.4.07

A. V. Fateev, Y. V. Vilkov, V. E. Chebotarev, M. G. Matylenko, G. P. Titov

{"title":"Precision space telescope attitude determination and control system design principles","authors":"A. V. Fateev, Y. V. Vilkov, V. E. Chebotarev, M. G. Matylenko, G. P. Titov","doi":"10.26732/j.st.2023.4.07","DOIUrl":"https://doi.org/10.26732/j.st.2023.4.07","url":null,"abstract":"In order to preclude the impact of atmospheric factors on the quality of received data, state of the art astronomy research projects require spacecraft mounted telescopes. However, such designs entail the issue of sustaining the accuracy of telescope boresight attitude relative to the object of observation for the required period of time. This paper is a summary of design principles for an attitude determination and control system of a space telescope mounted rigidly onboard a spacecraft. The paper formulates requirements for attitude accuracy, and proposes a viable equipment configuration as well as a three- stage attitude control algorithm. The first stage of the algorithm ensures primary boresight pointing towards the target object prior to the object being captured in the telescope’s FoV based on star tracker and angular rate sensor data. The second stage of the algorithm ensures boresight positioning relative to the target object direction up to an error value allowing for the required image quality, based on telescope readings. The third stage of the algorithm ensures telescope boresight holding relative to the target object direction with a required accuracy for the duration of exposure. Interferences from operating satellite equipment are reviewed, and the principles of reducing their impact on sighting accuracy are formulated. Low inclination, low eccentricity geostationary orbit is recommended as the best operating environment for the space telescope’s scientific instrumentation, as well as for providing a continuous data interface between spacecraft and ground segment.","PeriodicalId":119001,"journal":{"name":"Spacecrafts & Technologies","volume":" 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139136072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Creation of a simulation model of a solar battery 创建太阳能电池模拟模型

Spacecrafts & Technologies Pub Date : 2023-12-31 DOI: 10.26732/j.st.2023.4.09

R. V. Romanov

引用次数: 0

Methods and means of measuring the gain and ellipticity coefficient of spacecraft antennas 测量航天器天线增益和椭圆系数的方法和手段

Spacecrafts & Technologies Pub Date : 2023-12-31 DOI: 10.26732/j.st.2023.4.04

V. I. Grits

{"title":"Methods and means of measuring the gain and ellipticity coefficient of spacecraft antennas","authors":"V. I. Grits","doi":"10.26732/j.st.2023.4.04","DOIUrl":"https://doi.org/10.26732/j.st.2023.4.04","url":null,"abstract":"One of the main components of any spacecraft is antennas, which are used to receive and transmit information. An inherent stage of spacecraft production is ground experimental testing (GET) of both the complete spacecraft and its individual parts, including antennas. After the antenna has passed the another stage of testing, it is necessary to verify that its radio technical characteristics (RTC) comply with the requirements stated in the technical specification (specifications). The most important characteristics of any antenna are its gain and ellipticity coefficient (EC). The purpose of this article is considering the main methods of measuring the gain and EC of microwave antennas. In the article such well- known methods of measuring the gain and ellipticity coefficient as three- antenna method, comparison method, flat screen method are considered. The three- antenna method on a planar near- field scanner, with using two paths, and using an indicator receiver are considered. The method of comparison on a collimator antenna range is described, in two variants: using two reference antennas, with one of which the signal amplitudes are measured, and using a two- channel power meter.","PeriodicalId":119001,"journal":{"name":"Spacecrafts & Technologies","volume":"72 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139130439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Algorithm for identifying RLC parameters 确定 RLC 参数的算法

Spacecrafts & Technologies Pub Date : 2023-12-31 DOI: 10.26732/j.st.2023.4.06

D. K. Lobanov, T. G. Oreshenko, A. E. Schmidt

{"title":"Algorithm for identifying RLC parameters","authors":"D. K. Lobanov, T. G. Oreshenko, A. E. Schmidt","doi":"10.26732/j.st.2023.4.06","DOIUrl":"https://doi.org/10.26732/j.st.2023.4.06","url":null,"abstract":"The article discusses an algorithm capable of determining the substitution scheme of the investigated circuit and calculating the parameters of its elements without operator intervention, based on the admittance frequency characteristics. This algorithm enhances the functional capabilities of RLC meters and can be applied to solve practical problems related to identifying the substitution scheme of the investigated circuit. As an RLC meter measures the total resistance only at one or several fixed frequencies, obtaining an understanding of the substitution scheme from these measurements is challenging. To select the substitution scheme, an analysis of the impedance or admittance frequency characteristics is required. Typically, this analysis is performed manually and is time- consuming. The proposed algorithm automates the analysis of the admittance frequency characteristics. The algorithm associates values and the sequence of slopes of the admittance frequency characteristics with an array of known sequences and slope values for known substitution schemes. The calculation of substitution scheme parameters is based on the resonance frequencies and the heights of zero slopes. To minimize the impact of noise on result accuracy, a synchronous signal detection method is employed. The article introduces a criterion for assessing the algorithm's performance and conducts testing on several types of circuits. During testing, the relative error in calculating substitution scheme parameters was evaluated, with a maximum value not exceeding 6 %.","PeriodicalId":119001,"journal":{"name":"Spacecrafts & Technologies","volume":"1 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139130511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microvibration analysis methods review 微振动分析方法回顾

Spacecrafts & Technologies Pub Date : 2023-12-31 DOI: 10.26732/j.st.2023.4.02

A. P. Kravchunovsky

{"title":"Microvibration analysis methods review","authors":"A. P. Kravchunovsky","doi":"10.26732/j.st.2023.4.02","DOIUrl":"https://doi.org/10.26732/j.st.2023.4.02","url":null,"abstract":"It is known that today the problem of microvibration in spacecraft structures is relevant and widely researched. On- orbit operation of modern spacecrafts such as geodetic satellites, Earth observation satellites or space telescopes is associated with the use of onboard equipment sensitive to micro- vibration. In most cases, the conditions for the normal functioning of precision spacecraft equipment are provided by the operation of electromechanical devices, which in turn are sources of vibration. This article attempts to highlight the main approaches to the microvibration analysis that are known today. In this regard, the analysis of both native and foreign sources, in which the central problem is the analysis of microvibration, is carried out. This paper takes formulation of the microvibration problem and its role in the creation of modern spacecraft process. It also gives a literature review on methods and approaches to the microvibration analysis of spacecraft. Based on the analysis of publications on a similar topic, here one can find the tasks to solve in the process of the spacecraft microvibration analysis. The advantages, disadvantages and limitations of existing approaches and methods are revealed.","PeriodicalId":119001,"journal":{"name":"Spacecrafts & Technologies","volume":"102 21","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139133671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermal emission cooling of aircraft elements. Review of modern studies 飞机部件的热辐射冷却。现代研究综述

Spacecrafts & Technologies Pub Date : 2023-12-31 DOI: 10.26732/j.st.2023.4.01

P. A. Arkhipov, A. Kolychev, M. V. Chernyshov, V. A. Kernozhitsky

{"title":"Thermal emission cooling of aircraft elements. Review of modern studies","authors":"P. A. Arkhipov, A. Kolychev, M. V. Chernyshov, V. A. Kernozhitsky","doi":"10.26732/j.st.2023.4.01","DOIUrl":"https://doi.org/10.26732/j.st.2023.4.01","url":null,"abstract":"The purpose of this article is to review the current state of research in the field of thermal emission cooling and the feasibility study effect and to highlight their potential applications in astronautics and rocket science, especially for reusable spacecraft and high-speed aircraft. The article summarizes the results of the work of several research groups from several universities in Russia, the USA and China. It discusses theoretical models and experimental developments of thermal emission cooling technology, without going into detailed methodologies. The main research in this area is carried out by teams from the universities of Michigan, Colorado, Vermont and Texas in the USA with the active support of Lockheed Martin Corporation. Experimental studies of this technology are already being actively carried out at these universities. Moreover, the results already obtained correlate well with the results of theoretical study, from which we can conclude about the prospects of research. The effect of thermoelectronic emission makes it possible to reduce the temperature of the leading edges of the spacecraft, which is especially important for reusable spacecraft and unmanned missions, where maintaining the optimal temperature of components becomes a key factor in the service life and reliability of the system.","PeriodicalId":119001,"journal":{"name":"Spacecrafts & Technologies","volume":"100 14","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139131632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Measures for attenuation of interference at the level of design of the measuring device of spacecraft 航天器测量装置设计层面的干扰衰减措施

Spacecrafts & Technologies Pub Date : 2023-12-31 DOI: 10.26732/j.st.2023.4.05

A. I. Gornostaev

{"title":"Measures for attenuation of interference at the level of design of the measuring device of spacecraft","authors":"A. I. Gornostaev","doi":"10.26732/j.st.2023.4.05","DOIUrl":"https://doi.org/10.26732/j.st.2023.4.05","url":null,"abstract":"When developing temperature control interface modules used as part of spacecraft onboard equipment, it is important to correctly substantiate the set of measures to ensure their noise immunity, taken at the design levels of the measuring system, measuring device and temperature control interface module. Such a justification involves an assessment of the effectiveness of possible interference mitigation techniques at each design level. The article is devoted to the consideration of interference mitigation measures at the design level of the measuring device, which should be taken to ensure the required noise immunity of the temperature control interface module in combination with measures taken at other design levels. It is shown that in order to ensure the required noise immunity of temperature control interface modules, it is necessary at the design level of the measuring device to provide for measures to mitigate interference in the power supply module, the central instrument module and inter-module interfaces, as well as measures to eliminate gross measurement errors (misses) when processing digital data in the central instrument module. In the power supply module, it is possible to attenuate interference by introducing differential and common mode filters at the input and switching filters at the output. In the central instrument module and inter-module interfaces of the secondary power buses, noise mitigation is possible by dividing the common power bus into analog and digital buses and combining them at an equipotential point. In the central instrument module, it is possible to eliminate misses by using various statistical methods for processing digital data.","PeriodicalId":119001,"journal":{"name":"Spacecrafts & Technologies","volume":"30 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139132536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study of the accuracy characteristics of a GNSS receiver with an antenna array 带有天线阵列的全球导航卫星系统接收器精度特性研究

Spacecrafts & Technologies Pub Date : 2023-12-31 DOI: 10.26732/j.st.2023.4.10

V. N. Tyapkin, A. Gladyshev, D. Dmitriev

{"title":"Study of the accuracy characteristics of a GNSS receiver with an antenna array","authors":"V. N. Tyapkin, A. Gladyshev, D. Dmitriev","doi":"10.26732/j.st.2023.4.10","DOIUrl":"https://doi.org/10.26732/j.st.2023.4.10","url":null,"abstract":"The article presents the results of experimental studies of the accuracy of measuring navigation parameters by a receiver of global navigation satellite systems (GNSS receiver) equipped with an antenna array. The use of ring antenna arrays in GNSS receivers is substantiated. The main advantage of such antenna arrays is their invariance to the direction of the main lobe of the radiation pattern in the azimuthal plane. However, ring antenna arrays have some disadvantages. The use of the minimum required number of radiators in such antenna arrays to form a beam of a given width leads to a simultaneous increase in the level of side lobes. However, when using ring antenna arrays in GNSS receivers, this drawback can be neglected, since the level of side lobes significantly affects the quality of navigation signal reception only with powerful signal re- reflections. The structure of the hardware- software complex for research is given and the principle of its operation is described. Its main parts are a 24-channel beam- forming GNSS receiver and an 8-element ring antenna array. The software and hardware complex allows the study of various configurations of antenna arrays – two, four and eight elements. The technique of carrying out the experiment is given. A eature of the technique is the use of differences in measured pseudoranges using a single antenna and various configurations of antenna arrays. The results of measurements of code and phase pseudorange are presented.","PeriodicalId":119001,"journal":{"name":"Spacecrafts & Technologies","volume":"113 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139133146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Formulation of the problem of structured-element modeling of jet interference in a nozzle block 喷嘴块中射流干扰的结构元素建模问题的提出

Spacecrafts & Technologies Pub Date : 2023-12-31 DOI: 10.26732/j.st.2023.4.08

V. D. Ilin, A. P. Mashtakov

{"title":"Formulation of the problem of structured-element modeling of jet interference in a nozzle block","authors":"V. D. Ilin, A. P. Mashtakov","doi":"10.26732/j.st.2023.4.08","DOIUrl":"https://doi.org/10.26732/j.st.2023.4.08","url":null,"abstract":"The objects of research are supersonic composite jet flows, as well as structural elements of flows (shock and acoustic waves, gas dynamic discontinuity surfaces), which act with each other and with various technical objects. Such objects may be structural elements or parts of special technical systems that experience loads during operation, or are subjected to targeted effects in order to improve their mechanical properties. The research is carried out in order to develop mathematical models describing the interaction of structural elements of the flow supersonic gas jets among themselves in composite jets. When performing the work, various methods allowing to model gas-jets flows and processes are considered. To solve the problem method of structured- element modeling of gas-jet processes was chosen [1–4]. This method focused on the creation of engineering methods for calculating launch gas-dynamics problems. The scope of application of the method can cover not only space roket, also civilian industry is in part where they face the problems of jet flow. For example with the need to improve the reliability of products, their strength and metal characteristics. The direction of subsequent theoretical and experimental research, which determine the development of the structural-element method, are determined and clarified.","PeriodicalId":119001,"journal":{"name":"Spacecrafts & Technologies","volume":"119 47","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139133218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mathematical modeling of the technological process of twisting a waveguide 波导扭转技术过程的数学建模

Spacecrafts & Technologies Pub Date : 2023-12-31 DOI: 10.26732/j.st.2023.4.03

V. V. Timofeev, I. V. Trifanov, E. V. Patraev

{"title":"Mathematical modeling of the technological process of twisting a waveguide","authors":"V. V. Timofeev, I. V. Trifanov, E. V. Patraev","doi":"10.26732/j.st.2023.4.03","DOIUrl":"https://doi.org/10.26732/j.st.2023.4.03","url":null,"abstract":"Twisted waveguides are part of waveguide paths of antenna- feeder devices of spacecraft. They have high requirements for accuracy and reliability. They are made of profiled rectangular pipes. The twisting of waveguide pipes with a cross- sectional size of less than 11x5.5 mm is carried out in the device using a rigid calibration mandrel. The calculation method determined the main parameters of the technological process of twisting the waveguide tube (torque M, drawing force Pпр). When twisting workpieces with cross sections according to GOST, the torques (M) and drawing forces (Pпр) from the cross- section sizes vary according to a nonlinear relationship. Twisting the workpiece from M4 requires less torque (M) and drawing force (Pпр) than for the workpiece from M1. By mathematical modeling, it is possible to select the optimal technological mode in advance, thereby ensuring high quality of waveguide twisting manufacturing. To substantiate the calculation results, the methods of control of technological parameters and quality control of the product manufacturing were considered. A problem has been found in measuring the torque and pulling force when twisting the workpiece. Therefore, the pulling force should be measured from the machine. A method for measuring torque using a non- contact torque sensor is proposed. The manufacturing quality is supposed to be carried out by the STRESSVISION mechanical stress scanner, and electrical tests.","PeriodicalId":119001,"journal":{"name":"Spacecrafts & Technologies","volume":"111 27","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139135243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spacecrafts &amp; Technologies最新文献

Spacecrafts & Technologies最新文献