1–20 of 4,224 hits
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    3D waypoint generation in a dynamic environment for an airborne launch mission

    Dicheva, S / Bestaoui, Y | SAGE Publications | 2012
    of the A* algorithm with avoidance of detected obstacles is presented in this article. As the mission proceeds, the information about the ...

    4-degrees of freedom attitude equations of motion: A new approach for simulating flexible satellite dynamics with time-varying payload despite time delay and disturbances

    Nikpay, Shayesteh / Fakoor, Mahdi / Kalhor, Ahmad | SAGE Publications | 2023
    A new approach for the pointing of satellite’s payload is improving the dynamics of satellites to more than 3-DOF. In this approach, there ...
    Keywords: nonlinear 4-degrees of freedom equations of motion

    4-GNSS radio occultation satellite constellation design based on Dual-gate uniformity evaluation index

    Wang, Jue-yao / Liang, Bin | SAGE Publications | 2017
    occultation (RO) atmosphere sounding technology in the last decade. The possibility of reducing the sounding satellites while keeping the amount of ...

    25 Kv Electrical Multiple Unit for The Kowloon–Canton Railway (British Section)

    Botham, G J M / McNeil, J H | SAGE Publications | 1984
    The paper gives a brief history of the Kowloon–Canton Railway and outlines its modernization. The new rolling stock is described together ...

    A 3D pitch and impact-angle constrained guidance scheme

    Varma, S Aditya / Kothari, Mangal | SAGE Publications | 2019
    increase its effectiveness, the paper considers pitch constrained impact-angle law that drives the terminal angle of attack to zero. This ensures ...

    A 6-DOF extended state observer–based adaptive generalized super twisting algorithm of fault-tolerant control for coupled spacecraft with actuator saturation

    Mei, Yafei / Gong, Kejie / Liao, Ying | SAGE Publications | 2023
    leader spacecraft for coupled spacecraft tracking maneuver in the case of inertia parametric uncertainties, external disturbances, actuator ...

    A back-propagation approach to compensate velocity and position errors in an integrated inertial/celestial navigation system using unscented Kalman filter

    Nobahari, Hadi / Ghanbarpour Asl, Habib / Abtahi, Seid Farhad | SAGE Publications | 2014
    compensated. The validity of the proposed method is investigated through simulation of launch vehicle navigation. Simulation results show a great ...

    A bank-to-turn command calculation and singularity control strategy for agile missiles

    Wen, Qiu-Qiu / Xia, Qun-Li | SAGE Publications | 2014
    induced to eliminate the oscillation of roll-angle command due to the noises in guidance commands. Three control zones are designed to ensure that ...

    A Bayesian network model integrated in a prognostics and health management system for aircraft line maintenance

    Ferreiro, S / Arnaiz, A / Sierra, B et al. | SAGE Publications | 2011
    The maintenance strategies of different industrial sectors are changing and evolving continuously in search of cost reduction, optimization ...

    A Better Than Average Stress Model—Photoelastic Analysis for Airbus Design

    O'Brien, E W | SAGE Publications | 1993
    necessitated the development of improved analysis techniques involving photoelasticity as a design tool—‘a better than average stress model ...

    A biased proportional navigation guidance law with large impact angle constraint and the time-to-go estimation

    Zhang, You-An / Ma, Guo-Xin / Wu, Hua-Li | SAGE Publications | 2014
    °), estimating the time-to-go accurately is the key of impact time and impact angle control guidance (ITIACG). The objectives of this paper are to ...

    A blended control strategy for intercepting high-speed target in high altitude

    Zhang, Youan / Wu, Huali / Liu, Jingmao et al. | SAGE Publications | 2018
    To intercept target with high speed in high altitude, a blended control strategy is presented. The control strategy consists of two ...

    Abrasive wear of railway track by solid contaminants

    Grieve, D. G. / Dwyer-Joyce, R. S. / Beynon, J. H. | SAGE Publications | 2001
    The operation of railway track is likely to involve the presence of solid contaminants on the line at some stage. This may be from the ...

    A carbon dioxide thermal rocket that utilizes an indigenous resource in raw form for Mars exploration

    Yu, D-R / Lv, X-W / Qin, J et al. | SAGE Publications | 2010
    A CO2 thermal rocket that utilizes an indigenous resource directly for propulsion in Mars is proposed. The cycle of the proposed ...

    A case study involving continuous system methods of inverse simulation for an unmanned aerial vehicle application

    Murray-Smith, DJ / McGookin, EW | SAGE Publications | 2015
    analytical methods of inversion present difficulties. The two approaches considered involve continuous system simulation principles. One is an ...

    A causal model to explore the ACAS induced collisions

    Jun, Tang / Piera, Miquel Angel / Ruiz, Sergio | SAGE Publications | 2014
    that address multithread threats. This paper considers some of the difficulties in establishing validation of the airborne collision avoidance ...

    Acceptance testing and commissioning of a flight simulator for rotorcraft simulation fidelity research

    White, Mark D / Perfect, Philip / Padfield, Gareth D et al. | SAGE Publications | 2013
    The rotorcraft industry faces a number of challenges today regarding the replacement of ageing airframes, an expansion in the operational ...

    Accommodating the multi-state constraint Kalman filter for visual-inertial navigation in a moving and stationary flight

    Mahmoudi, Arshiya / Mortazavi, Mahdi / Sabzehparvar, Mehdi | SAGE Publications | 2022
    For more than a decade, the multi-state constraint Kalman filter is used for visual-inertial navigation. Its advantages are the light ...

    Accuracy analysis and form-finding design of uncertain mesh reflectors based on interval force density method

    Li, Tuanjie / Deng, Hanqing / Tang, Yaqiong et al. | SAGE Publications | 2017
    Mesh reflectors are uncertain structures because of the existing errors of dimension and material in the procedure of design and ...

    Accuracy of the experimental assessment of running dynamics characteristics quantified through an uncertainty framework

    Licciardello, R / Funfschilling, C / Malavasi, G | SAGE Publications | 2017
    of the trans-European rail system and to contribute to European standards. This contribution targeted the reduction of cost of the process ...