Pleiades Publishing Ltd

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MEMS-based downhole tool incorporated in mobile inclinometric station for trajectory survey of grouped wellbores
Pleiades Publishing Ltd - Tập 4 - Trang 85-91 - 2013
Ya. I. Binder, A. E. Eliseenkov, A. S. Lysenko, V. G. Rozentsvein, V. M. Denisov, D. A. Sokolov
The paper proposes and analyzes the technical solutions developed for a principally new downhole tool not containing navigation grade gyros to be used within a mobile inclinometric station. MEMS inertial sensors are selected using comparative analysis of their instrumental errors and desired accuracies, and methodical errors of the proposed gyroscopic algorithm. The gyroinclinometer needs no initi...... hiện toàn bộ
Selected Features of Autonomous Underwater Robot Dynamics under Near-Bottom Equidistant Motion Control
Pleiades Publishing Ltd - Tập 10 - Trang 90-98 - 2019
L. V. Kiselev, A. V. Medvedev
Search and survey missions of an autonomous underwater robot are usually associated with motion along equidistant trajectories near the bottom. The most difficult problem here is to control motion in a vertical plane in presence of obstacles in the bottom relief along the motion route. When the obstacles are detected using a multi-channel front-viewing echolocation system, equidistant motion of th...... hiện toàn bộ
Mô Phỏng Tiếng Ồn Flicker Bằng Cách Chồng Chéo Các Quá Trình Đứng Yêu Cầu Bình Thường Dịch bởi AI
Pleiades Publishing Ltd - Tập 9 - Trang 218-226 - 2018
B. O. Kachanov, S. A. Akhmedova, N. A. Tuktarev, V. A. Novikov
Chi tiết về phương pháp nổi tiếng để biểu diễn tiếng ồn 1/f dưới dạng tổng của các quá trình đứng yên được trình bày. Hai chuỗi bộ lọc định hình được áp dụng trong băng tần tần số do người dùng chỉ định. Các mối quan hệ cho các tham số của bộ lọc được xác định. Lỗi trong việc xấp xỉ quang phổ được xem xét. Một thuật toán để mô hình hóa sự dao động dưới dạng một hệ thống các phương trình sai phân n...... hiện toàn bộ
#tiếng ồn 1/f #mô phỏng #bộ lọc định hình #hệ thống dẫn đường #phương trình sai phân ngẫu nhiên
Influence of nonuniform thickness of hemispherical resonator gyro shell on its unbalance parameters
Pleiades Publishing Ltd - Tập 8 - Trang 97-103 - 2017
M. A. Basarab, V. A. Matveev, B. S. Lunin, S. V. Fetisov
Formulas for the unbalance components of the hemispherical resonator gyro (HRG) with a shell of variable thickness in meridian direction are obtained. Various laws of thickness reduction from the pole to the edge are considered. It is shown that for the second form of excited oscillations, relative error in unbalance components (with the thickness variation neglected) can reach 10–15%. The obtaine...... hiện toàn bộ
Milli-HRG inertial navigation system
Pleiades Publishing Ltd - Tập 3 - Trang 227-234 - 2012
D. Meyer, D. Rozelle
The Hemispherical Resonator Gyro (HRG) has proven itself to be an ultra-reliable technology for space application with over 18 million operation hours and 100% mission success. Northrop Grumman Navigation Systems Division is developing a terrestrial inertial navigation system (INS) based on the proven space technology that can be used for precision pointing applications. The Precision Pointing Sys...... hiện toàn bộ
Using the Method of S-approximations to Determine Deflections of the Vertical and Geoid Heights
Pleiades Publishing Ltd - Tập 10 - Trang 21-26 - 2019
V. N. Koneshov, I. E. Stepanova
A modified method for S-approximations of anomalous potential fields is described; its advantages are discussed. Software has been developed to calculate deflections of the vertical (DOV) and geoid heights using the proposed technique. The results of DOV calculations for two regions of the Atlantic Ocean are given.
Autonomous navigation and rendezvous of spacecraft in lunar orbit
Pleiades Publishing Ltd - Tập 1 - Trang 310-320 - 2010
E. A. Mikrin, M. V. Mikhailov, S. N. Rozhkov
The task of autonomous navigation of a spacecraft in a lunar orbit on optical measurements of the star tracker and Moon horizon sensor is considered. A method to carry out the measurements is proposed, and a recurrent algorithm for definition of a current estimate of an orbit by earlier measurements is developed. The accuracy of problem solution is investigated. It is shown that the accuracy of th...... hiện toàn bộ
Possible Technologies of Progress Transport Cargo Vehicle Control during Experiments in Free Flight
Pleiades Publishing Ltd - Tập 9 - Trang 19-28 - 2018
M. Yu. Belyaev, T. V. Matveeva, D. N. Rulev
The International Space Station (ISS) project involves Russian Progress transport cargo vehicles (TCV) which often retain residual resources of their basic systems after they have completed their main tasks in the ISS program. Utilization of these resources for research purposes during free flight of the TCV after undocking from the station increases the efficiency of both the TCV operation and th...... hiện toàn bộ
A novel guidance and navigation system for MAVs capable of autonomous collision-free entering of buildings
Pleiades Publishing Ltd - Tập 6 Số 3 - Trang 157-165 - 2015
Manuel Popp, Silvia Prophet, Georg Scholz, Gert F. Trommer
A mobile high-precision absolute gravimeter based on atom interferometry
Pleiades Publishing Ltd - Tập 2 - Trang 170-177 - 2011
M. Schmidt, A. Senger, M. Hauth, C. Freier, V. Schkolnik, A. Peters
We present the new mobile and robust gravimeter GAIN (Gravimetric Atom Interferometer), which is based on interfering ensembles of laser cooled 87Rb atoms in an atomic fountain configuration. With a targeted accuracy of a few parts in 1010 for the measurement of local gravity, g, this instrument should offer about an order of magnitude improvement in performance over the best currently available a...... hiện toàn bộ
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