Spacecrafts & Technologies最新文献_第6页

Methods of mutual high-precision navigation based the use of relative modes of anglemeasuring receivers of global navigation satellite systems signals 基于全球卫星导航系统信号测角接收机相对模式的相互高精度导航方法

Spacecrafts & Technologies Pub Date : 2022-06-24 DOI: 10.26732/j.st.2022.2.07

D. Dmitriev, V. N. Tyapkin, Y. Fateev, A. Gladyshev, N. S. Kremez

{"title":"Methods of mutual high-precision navigation based the use of relative modes of anglemeasuring receivers of global navigation satellite systems signals","authors":"D. Dmitriev, V. N. Tyapkin, Y. Fateev, A. Gladyshev, N. S. Kremez","doi":"10.26732/j.st.2022.2.07","DOIUrl":"https://doi.org/10.26732/j.st.2022.2.07","url":null,"abstract":"The article presents the results of experimental studies of mutual high-precision navigation methods for unmanned and specialized transport systems. The proposed methods are based on the application of the relative operating modes of two or more angle-measuring receivers of global navigation satellite systems signals. To conduct research, a software and hardware complex has been developed, consisting of two angle-measuring receivers of global navigation satellite systems signals, a turntable and a computer model of the navigation system of unmanned and specialized transport systems. It provides the positioning error of the antenna system in angular coordinates less than 1 arc minute, which allows it to be used as a reference when measuring the angular displacements of the receiver of global navigation satellite systems signals antenna system. The results of measurements of planar and angular coordinates both in autonomous and relative phase modes of operation of goniometric receivers global navigation satellite systems signals are presented and analyzed. It has been established that the root-mean-square error of measuring relative coordinates was 0,019 meter. A further increase in the relative position measurement accuracy is possible by taking measures to reduce the multipath reception error, which is the most significant uncorrelated position measurement error by two sets of receivers of global navigation satellite systems signals. Thus, the methods of mutual high-precision navigation using angle-measuring receivers of global navigation satellite systems signals have high accuracy without the use of external information about differential corrections. This will allow the operation of unmanned or special transport systems in hard-toreach and northern regions, in conditions of lack of communication and other adverse factors.","PeriodicalId":119001,"journal":{"name":"Spacecrafts & Technologies","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124694097","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

Optical properties and radiation stability of polypropylene modified with MgO nanoparticles 纳米氧化镁改性聚丙烯的光学性能和辐射稳定性

Spacecrafts & Technologies Pub Date : 2022-06-24 DOI: 10.26732/j.st.2022.2.04

M. Mikhailov, V. A. Goronchko

{"title":"Optical properties and radiation stability of polypropylene modified with MgO nanoparticles","authors":"M. Mikhailov, V. A. Goronchko","doi":"10.26732/j.st.2022.2.04","DOIUrl":"https://doi.org/10.26732/j.st.2022.2.04","url":null,"abstract":"Polymer composite materials are widely used in spacecraft and stations in thermal control coatings, as sealants, seals, thermal insulation, as well as in many other structures and products. The main characteristic of such materials is the stability of properties and performance characteristics to the action of space factors, among which various types of radiation are the main damaging ones. Therefore, it is relevant to study the influence of electron, proton, solar spectrum quanta on the change in optical, electrical, mechanical, and other properties of polymer composite materials. This paper presents the results of a investigation of the optical properties and radiation stability of nanocomposites based on polypropylene modified by the solid state method with MgO nanoparticles in the concentration range of 1–5 mass.%. Diffuse reflectance spectra were recorded in a vacuum of 2·10-6 Torr before and after electron irradiation (in situ, E = 30 keV, H = 2·1016 cm-2). The analysis of the nature of the absorption bands recorded in the diffuse reflection spectra, which are due to the formation of free radicals: – С3Н5 –, – С3Н6 –, – C4H6 –, – C4H7 –, – C4H8–, – C4H12 –, – C5H7 –, – C5H10 –, was performed. The optimal value of the concentration of nanoparticles was established, equal to 2 mass.%, at which the area of the integral absorption band at 360 nm after irradiation decreased by 3,35 times, its intensity at the maximum by 3,88 times compared with unmodified polypropylene.","PeriodicalId":119001,"journal":{"name":"Spacecrafts & Technologies","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127317982","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 an unmanned object motion control system in SimInTech environment simmintech环境下无人物体运动控制系统的数学建模

Spacecrafts & Technologies Pub Date : 2022-03-29 DOI: 10.26732/j.st.2022.1.06

V. Myznikova, V. Ustimenko, A. Chubar, I. V. Solopko

{"title":"Mathematical modeling of an unmanned object motion control system in SimInTech environment","authors":"V. Myznikova, V. Ustimenko, A. Chubar, I. V. Solopko","doi":"10.26732/j.st.2022.1.06","DOIUrl":"https://doi.org/10.26732/j.st.2022.1.06","url":null,"abstract":"In today's world robotic devices are more and more often used to help people. They solve both domestic and industrial problems. When designing any object inevitably have to deal with testing under different conditions. To do this can build a test model, but if the object is quite complex and several models need to be built at once, to save labor and material resources can help mathematical modeling. This article presents mathematical modeling of processes based on typical functional blocks in the form of systems of differential-algebraic equations. Mathematical modeling and control algorithm as a set of interrelated structures are considered. The robot motion is simulated for the forward direction of rotation of wheels, the reverse direction of rotation, and the opposite directions of rotation. A model of the control device, which forms the control actions on the wheel motor according to the value of the deviation of the current orientation of the wheeled robot from the preset one, is constructed. These influences allow you to bring the orientation of the robot to the desired orientation. Quality metrics are obtained for various values of the rotational speed of the work. Although this model neglects the action of many forces that arise during the motion, it allows us to identify the influence on the motion and trajectory of the robot of such factors as the radius of the wheels, the distance between them, the magnitude of the voltage applied to the motors during the turn.","PeriodicalId":119001,"journal":{"name":"Spacecrafts & Technologies","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123847311","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: 2

Application of additive technologies in mechanical engineering for production of form-forming riggings 增材技术在成形索具生产机械工程中的应用

Spacecrafts & Technologies Pub Date : 2022-03-29 DOI: 10.26732/j.st.2022.1.03

M. A. Dremukhin, V. N. Nagovitsin

{"title":"Application of additive technologies in mechanical engineering for production of form-forming riggings","authors":"M. A. Dremukhin, V. N. Nagovitsin","doi":"10.26732/j.st.2022.1.03","DOIUrl":"https://doi.org/10.26732/j.st.2022.1.03","url":null,"abstract":"The article discusses the process of using additive technologies in the manufacture of formbuilding equipment. It is supposed to reduce the manufacturing time and labor costs of workers by using non-traditional technological systems in the manufacture of the form-building equipment’s model, which has qualitatively new properties and capabilities and also significantly increases the level of automation and intensification of production processes. When designing a technological process high information and computerization, a certain level of electrification and energy supply are required, therefore, the design of new technologies is based on rational technological processes, using accumulated experience, and a new system approach developed on the basis of the unity of production design technology using CAD/CAE/CAM systems. The extrusion method of three-dimensional printing using the FDM technology with the use of a new modified material of the PA12CF brand was adopted as the basis for the production of form-building equipment. This material is a polyamide-12 composite plastic reinforced with carbon fibers. The use of additive technologies using modern computer modeling based on the unity of technological systems is an urgent task. These technological systems will significantly increase productivity, reduce the production area occupied by equipment, reduce the duration of the production cycle, reduce the number of workers employed in production, and make it possible to switch to technologies that do not require paper-based design documentation. At the same time, additive technologies are open to their further development and have great potential to evolve and be modified in accordance with the changing external conditions on the labor market.","PeriodicalId":119001,"journal":{"name":"Spacecrafts & Technologies","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122307873","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: 1

To the question of including additional technical means in the Venus exploration program 关于在金星探测计划中加入额外技术手段的问题

Spacecrafts & Technologies Pub Date : 2022-03-29 DOI: 10.26732/j.st.2022.1.01

M. Yatsenko, V. Vorontsov

{"title":"To the question of including additional technical means in the Venus exploration program","authors":"M. Yatsenko, V. Vorontsov","doi":"10.26732/j.st.2022.1.01","DOIUrl":"https://doi.org/10.26732/j.st.2022.1.01","url":null,"abstract":"The current issue of expanding the scheme of the experiment for the contact research of Venus by including a multirotor aircraft as an additional technical means of research in a prospective expedition is considered. The concept is developed by the authors considers the possibility of creating and launching a multi-rotor aircraft (as a complex technical system) into the atmosphere of Venus in order to collect data on the composition and properties of the planet's atmosphere, as well as taking photos and videos of its surface. Such devices will operate for a certain time in the specified altitude levels (zones). The authors suggest mounting them in the descent vehicle. The article describes the goals of creating this technical system and the tasks that it should perform on the Venus. The paper illustrates the possible utilization options and schemes for putting a multirotor aircraft into operation in the atmosphere of the planet, the nature of its movement. As a module of the energy storage system, batteries are selected that will significantly improve the functioning of a multirotor aircraft and increase the duration of its motion in the atmosphere. The options for placing multirotor vehicles in the developed model of the base descent vehicle are shown, mass-dimensional parameters are estimated.","PeriodicalId":119001,"journal":{"name":"Spacecrafts & Technologies","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116808737","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: 2

Design of a CubeSat thermal control system for battery module 立方体卫星电池模块热控系统的设计

Spacecrafts & Technologies Pub Date : 2022-03-29 DOI: 10.26732/j.st.2022.1.04

E. A. Boltov, N. Elisov, A. Kumarin, I. Lomaka, S. Shafran

{"title":"Design of a CubeSat thermal control system for battery module","authors":"E. A. Boltov, N. Elisov, A. Kumarin, I. Lomaka, S. Shafran","doi":"10.26732/j.st.2022.1.04","DOIUrl":"https://doi.org/10.26732/j.st.2022.1.04","url":null,"abstract":"One of the most critical nanosatellite sub-systems is the energy power system. Batteries included in it are subject to a significant temperature effect. Therefore, in order to increase the efficiency of the energy power system and increase the service life of the batteries, it is necessary to use a thermal control system. The paper proposes an approach to designing a system for ensuring the thermal regime of a nanosatellite battery module. The approach consists of two stages. At the first stage, a series of thermal vacuum tests of the system is carried out. As part of the tests, the thermodynamic properties of the elements of the energy supply system (specific heat capacity and thermal conductivity) are evaluated. The evaluation is based on the results of processing samples of temperature measurements of individual elements of the system. The criterion for matching the obtained solution is the value of the emissivity of the components. At the second stage, the cooling of the battery pack during the flight of the nanosatellite in the shadow part of the orbit is estimated. The evaluation takes into account the experimental values of the thermodynamic values of the components of the system. Thus, an estimate was made «from above» of the radiated power of the energy power system. On the basis of experimental and calculated data, the adequacy of the selected power of the battery block heater was assessed. The article provides an experimental development of the proposed approach, the mathematical models used and equivalent schemes for heat simulation of the battery module.","PeriodicalId":119001,"journal":{"name":"Spacecrafts & Technologies","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127094041","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

Program for calculating the loads generated in spacecraft structure 计算航天器结构中产生的载荷的程序

Spacecrafts & Technologies Pub Date : 2022-03-29 DOI: 10.26732/j.st.2022.1.02

A. P. Kravchunovsky, R. A. Pryanichnikov, S. A. Zommer

{"title":"Program for calculating the loads generated in spacecraft structure","authors":"A. P. Kravchunovsky, R. A. Pryanichnikov, S. A. Zommer","doi":"10.26732/j.st.2022.1.02","DOIUrl":"https://doi.org/10.26732/j.st.2022.1.02","url":null,"abstract":"An algorithm as well as a program for calculating mechanical loads in spacecraft structure are developed in the frame of its preliminary strength assessment. The algorithm was developed with the aim of calculating loads of several design cases simultaneously. The main object for study of this paper was an algorithm for calculating internal forces for a bending beam. As part of a preliminary assessment, such an algorithm can be used to calculate the responses, which are appeared in the spacecraft structure during its ground and flight operations. In order to provide an effective use of developed algorithm, a computer program has been written. This program provides an automated calculation of loads in the spacecraft structure with the ability to output data in a format which convenient for its further use. Such parameters as geometrical data, mass properties of the spacecraft, its test and launch conditions, qualification factors and safety coefficients are initial data to start the calculation. To verify the results obtained with the program, they were compared with the results of the analytical solution of a similar problem. From the check it was revealed, that they are coincide.","PeriodicalId":119001,"journal":{"name":"Spacecrafts & Technologies","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133582831","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

Mobile complex of electronic countermeasures of satellite navigation systems for unmanned aerial vehicles 无人机卫星导航系统电子对抗机动复合体

Spacecrafts & Technologies Pub Date : 2022-03-29 DOI: 10.26732/j.st.2022.1.05

A. Gladyshev, A. N. Fomin, D. S. Ermolenko

引用次数: 0

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