21–40 von 326 Ergebnissen
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    Distributed Cooperative Search Control Method of Multiple UAVs for Moving Target

    Freier Zugriff
    Chang-jian Ru / Xiao-ming Qi / Xu-ning Guan | DOAJ | 2015
    To reduce the impact of uncertainties caused by unknown motion parameters on searching plan of moving targets and improve the efficiency of ...

    Firing Control Optimization of Impulse Thrusters for Trajectory Correction Projectiles

    Freier Zugriff
    Min Gao / Yongwei Zhang / Suochang Yang | DOAJ | 2015
    This paper presents an optimum control scheme of firing time and firing phase angle by taking impact point deviation as optimum objective ...

    Optimization of Trajectory Correction Scheme for Guided Mortar Projectiles

    Freier Zugriff
    Yongwei Zhang / Min Gao / Suochang Yang et al. | DOAJ | 2015
    flight; however, this method cannot get the max trajectory correction capability of canards according to our analysis. This paper presents an ...

    Guidance and Control Design for a Class of Spin-Stabilized Projectiles with a Two-Dimensional Trajectory Correction Fuze

    Freier Zugriff
    Yi Wang / Wei-dong Song / Dan Fang et al. | DOAJ | 2015
    A guidance and control strategy for a class of 2D trajectory correction fuze with fixed canards is developed in this paper. Firstly ...

    Optimal Configuration of Virtual Links for Avionics Network Systems

    Freier Zugriff
    Dongha An / Kyong Hoon Kim / Ki-Il Kim | DOAJ | 2015
    meeting the requirement of AFDX. The first is to search available feasible configuration (MTU, BAG) pairs to satisfy application requirements as ...

    A Three-Dimensional Cooperative Guidance Law of Multimissile System

    Freier Zugriff
    Xing Wei / Yongji Wang / Shuai Dong et al. | DOAJ | 2015
    In order to conduct saturation attacks on a static target, the cooperative guidance problem of multimissile system is researched. A three ...

    Research on Dynamic Reliability of a Jet Pipe Servo Valve Based on Generalized Stochastic Petri Nets

    Freier Zugriff
    Yuanbo Chu / Zhaohui Yuan / Jia Chen | DOAJ | 2015
    The jet pipe servo valve is widely used in the military fields of aviation and ship, whose reliability has obvious randomness and dynamic ...

    Sensitivity Analysis of Transonic Flow over J-78 Wings

    Freier Zugriff
    Alexander Kuzmin | DOAJ | 2015
    angles of attack. Solutions of the unsteady Reynolds-averaged Navier-Stokes equations are obtained with a finite-volume solver on unstructured ...

    Frequencies of Transverse and Longitudinal Oscillations in Supersonic Cavity Flows

    Freier Zugriff
    Taro Handa / Kazuya Tanigawa / Yusuke Kihara et al. | DOAJ | 2015
    effect of the cavity length-to-depth (L/D) ratio on the frequency for a free-stream Mach number of 1.7. The pressure oscillations are measured by ...

    Hybrid Vortex Method for the Aerodynamic Analysis of Wind Turbine

    Freier Zugriff
    Hao Hu / Bo Gu / Hongtao Zhang et al. | DOAJ | 2015
    calculate the blade surface vortex sheets and the vortex particle method was employed to simulate the blade wake vortices. As a result of numerical ...

    Investigation of Flow Control for the Hypersonic Inlets via Counter Flow

    Freier Zugriff
    Xiaoqiang Fan / Yuan Tao | DOAJ | 2015
    , which is similar to the shock reflection ion hysteresis phenomenon. In order to improve the performance of the flow field, counterflow is ...

    Guidance Law Design for a Class of Dual-Spin Mortars

    Freier Zugriff
    Qing-wei Guo / Wei-dong Song / Yi Wang et al. | DOAJ | 2015
    To minimize the cost and maximize the ease of use, a class of dual-spin mortars is designed which only rely on GPS receiver and geomagnetic ...

    Prediction of Pressing Quality for Press-Fit Assembly Based on Press-Fit Curve and Maximum Press-Mounting Force

    Freier Zugriff
    Bo You / Zhifeng Lou / Yi Luo et al. | DOAJ | 2015
    In order to predict pressing quality of precision press-fit assembly, press-fit curves and maximum press-mounting force of press-fit ...

    Multidisciplinary Design Optimization and Analysis of Hydrazine Monopropellant Propulsion System

    Freier Zugriff
    Amirhossein Adami / Mahdi Mortazavi / Mehran Nosratollahi et al. | DOAJ | 2015
    can be solved by multidisciplinary design optimization (MDO) technique with simultaneous optimization of all subsystems with respect to any ...

    Drag Reduction of a Turbulent Boundary Layer over an Oscillating Wall and Its Variation with Reynolds Number

    Freier Zugriff
    Martin Skote / Maneesh Mishra / Yanhua Wu | DOAJ | 2015
    simulation. The temporal wall forcing produces a considerable drag reduction over the region where oscillation occurs. Downstream development of drag ...

    Cone Algorithm of Spinning Vehicles under Dynamic Coning Environment

    Freier Zugriff
    Shuang-biao Zhang / Xing-cheng Li / Zhong Su | DOAJ | 2015
    Due to the fact that attitude error of vehicles has an intense trend of divergence when vehicles undergo worsening coning environment, in ...

    Assessments of k-kL Turbulence Model Based on Menter’s Modification to Rotta’s Two-Equation Model

    Freier Zugriff
    Khaled S. Abdol-Hamid | DOAJ | 2015
    The main objective of this paper is to construct a turbulence model with a more reliable second equation simulating length scale. In the ...

    Degree Distribution of Arbitrary AANET

    Freier Zugriff
    Xue Liu / Xiaoping Zeng / Zhiming Wang et al. | DOAJ | 2015

    A Numerical Method for Blast Shock Wave Analysis of Missile Launch from Aircraft

    Freier Zugriff
    Sebastian Heimbs / Josef Ritzer / Johannes Markmiller | DOAJ | 2015
    An efficient empirical approach was developed to accurately represent the blast shock wave loading resulting from the launch of a missile ...

    Numerical Simulation of Reactive Flows in Overexpanded Supersonic Nozzle with Film Cooling

    Freier Zugriff
    Mohamed Sellam / Amer Chpoun | DOAJ | 2015
    , which in turn, leads to the appearance of strong side loads that may be detrimental to the rocket engine structural integrity. It is therefore ...