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   线性化 在 航空航天科学与工程 分类中 的翻译结果: 查询用时:0.054秒
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线性化     
相关语句
  linearization
    HIGHER ORDER LINEARIZATION METHOD OF NONLINEAR SYSTEMS AND ITS APPLICATION FOR SECOND ORDER PERTURBATION GUIDANCE
    非线性系统的高阶线性化方法及其在二阶摄动制导中的应用
短句来源
    Nonlinear system partial linearization and its application to flight control
    非线性系统部分线性化及其在飞行控制中的应用
短句来源
    FLIGHT CONTROL DESIGN USING EXTENDED LINEARIZATION OF NONLINEAR SYSTEMS
    采用非线性系统扩展线性化方法设计飞控系统
短句来源
    Terrain Linearization Method Based on Neural Network
    基于人工神经网络的地形线性化方法
短句来源
    STUDY OF IMPROVEMENT ON THE ACCURACY OF STATISTICAL LINEARIZATION AND HIGHER MOMENT PROPAGATION METHOD
    对提高统计线性化精度及高阶矩传播法的研究
短句来源
更多       
  linearized
    LINEARIZED MASS EQUATION FOR MULTI-STAGE VEHICLE WITH SERIES OR PARALLEL PROPULSION SYSTEM
    串联与并联推进多级运载火箭线性化质量方程
短句来源
    Three-Lifting-Surface Aircraft Disturbance Motion Linearized Model
    三升力面飞机扰动运动线性化模型
短句来源
    To calculate the elastic stability of overall stiffened structure of missile shell under axial compression, the paper presentes a practical finite element model, so that the very nonlinear problems are linearized and the stability calculation of the overall structure is greatly simplified.
    本文对轴压作用下导弹薄壁加筋半硬壳结构总体弹性稳定性分析问题,提出了一种实用的有限元计算模型,使得十分复杂的非线性问题线性化,大大简化了这种结构总体稳定性计算。
短句来源
    The nonlinear equation of aircraft is linearized by state transforming differential relationship between input and a new input, and the nonlinear system is decoupled to a one order linear system and a two order linear system.
    通过状态变换输出与新输入间的线性微分关系使非线性飞机方程反馈线性化,将原非线性系统解耦为一个一阶和一个二阶线性系统。
短句来源
    Then, the nonlinear equation of motion(EOM) is linearized on the condition of little perturbation, and divided into longitudinal and lateral equations.
    在此基础上 ,采用小扰动方法将原始的非线性微分方程线性化 ,并将线性化后的方程分为纵向和横侧向两组 .
短句来源
更多       
  linearize
    One is based on the simulink model, using the trim and linearize function which are provided in the simulation platform of Matlab/Simulink.
    一种是基Simulink模型的配平线性化方法,直接利用Matlab平台提供的配平与线性化函数;
短句来源
    Establish the system model of mixed H_2/H_∞ control problem after linearize the nonlinear motion control system of aircraft,design a H_2/H_∞ robust control,and make aircraft motion system not only has stability robustness,but also satisfy some performance constrains.
    用小扰动方法对飞行器非线性运动控制系统进行线性化,之后建立了混合H2/H∞鲁棒控制问题的系统模型,设计了H2/H∞鲁棒控制器,使飞行器运动系统有较大的鲁棒稳定性同时满足一定的鲁棒性能要求。
短句来源
    2. Trim and linearize the nature tailless UAV using two methods.
    2.使用两种方法对自然飞机模型进行配平线性化工作。
短句来源
    The other is to trim and linearize the nature tailless UAV based on calculating the big-small derivatives.
    另一种是通过编程,计算大小导数的方法进行配平和获取线性化矩阵。
短句来源
    Implicit difference formulation for calculating unsteady temperature field of the thrust chamber with radiation cooling for liquid rocket engine has been producted, and linearize treatment is accomplished.
    导出了计算液体火箭发动机辐射冷却推力室不稳定温度场的隐式差分格式,并作了线性化处理。
短句来源
更多       
  is linearized
    The nonlinear equation of aircraft is linearized by state transforming differential relationship between input and a new input, and the nonlinear system is decoupled to a one order linear system and a two order linear system.
    通过状态变换输出与新输入间的线性微分关系使非线性飞机方程反馈线性化,将原非线性系统解耦为一个一阶和一个二阶线性系统。
短句来源
    Then, the nonlinear equation of motion(EOM) is linearized on the condition of little perturbation, and divided into longitudinal and lateral equations.
    在此基础上 ,采用小扰动方法将原始的非线性微分方程线性化 ,并将线性化后的方程分为纵向和横侧向两组 .
短句来源
    The back section mechanical system (from the input of the reversible hydraulic servo actuating system to the rudder) is linearized, and the order is reduced to the fourth-order and the first-order.
    对从可逆式液压助力器到舵面的后段部分进行线性化和降阶处理,分别建立了助力器的四阶和一阶线性等效模型。
短句来源
    After analyzing the parameter uncertainty and space environmental disturbances, attitude dynamics model of microsatellite are obtained accordingly, then the model is linearized.
    根据微小卫星的特点,分析了星体参数不确定性和各种空间环境干扰力矩,推导出微小卫星的姿态动力学模型,并对模型进行了线性化处理。
短句来源
    To modeling the nonlinear part, nonlinear PWM process is linearized by equivalent-area method, so linear models of whole system in every condition are built.
    对非线性环节,应用等效面积方法把本质非线性的PWM过程线性化,从而给出不同工况下系统的线性模型。
短句来源
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      linearization
    Reductive group actions on affine quadrics with 1-dimensional quotient: Linearization when a linear model exists
          
    The proof of the above results is based on a shooting technique, together with a linearization method and a scaling argument.
          
    In the book (Adaptive Identification, Prediction and Control-Multi Level Recursive Approach), the concept of dynamical linearization of nonlinear systems has been presented.
          
    This dynamical linearization is formal only, not a real linearization.
          
    From the linearization procedure, we can find a new approach of system identification, which is on-line real-time modeling and real-time feedback control correction.
          
    更多          
      linearized
    Linearized oscillations of delay differential equations and applications
          
    A linearized technique is introduced in order to obtain the error estimates of the approximate solutions.
          
    Cauchy problem for linearized system of two-dimensional isentropic flow with axisymmetrical initial data in gas dynamics
          
    The explicit solution to Cauchy problem for linearized system of two-dimensional isentropic flow with axisymmetrical initial data in gas dynamics is given.
          
    The trust region subproblem of our method is to minimize a conic function subject to the linearized constraints and trust region bound.
          
    更多          
      linearize
    The method begins with a suitable initial guess value of the solution, then finds a suitable matrix to linearize the system and constructs an iteration algorithm to generate the monotone sequence.
          
    The control strategies utilized real-time state variables obtained by PMU to linearize the state equations of the system, and then the linear optimal control strategy was used to design excitation controllers.
          
    The use of SPO allows to input/output linearize and decouple the strongly coupled nonlinear robot manipulator system merely by the feedback of joint angles.
          
    A mathematical description of the experimental curve shape has been proposed to linearize the kinetic data and estimate the rate constant for such non-enzymatic interaction.
          
    The amplitude of the oscillations of the vibrator and the perturbations of the flow parameters corresponding to it are assumed to be small, and this makes it possible to linearize these equations.
          
    更多          
      is linearized
    The balance equation of surfactant amount in the vicinity of the final equilibrium state of a materially isolated solution is linearized.
          
    The basic equation is linearized by means of a Kirchhoff type ansatz.
          
    The equation is linearized under the assumption that the Rossby number is small.
          
    The equations of thermal convection in a rotating plane horizontal layer of nonequilibrium turbulent fluid are obtained, the system of equations is linearized and the boundary value problem is formulated.
          
    The problem is linearized for one-dimensional perturbations in a gas at rest.
          
    更多          


    The three-dimensional unsteady second-order non-homogeneous differential equation has been derived by superposition of a small disturbance on a given steady three-dimensional flow. Based on the assumption of high Mach numbers this second-order equation for unsteady flow reduces to a form analogous to that for steady flow. This makes it possible to solve the equation by methods used in the second-order theory for steady flows. In the course of solution the flows are constrained and corrected according to the...

    The three-dimensional unsteady second-order non-homogeneous differential equation has been derived by superposition of a small disturbance on a given steady three-dimensional flow. Based on the assumption of high Mach numbers this second-order equation for unsteady flow reduces to a form analogous to that for steady flow. This makes it possible to solve the equation by methods used in the second-order theory for steady flows. In the course of solution the flows are constrained and corrected according to the PLK method, and singularities are thus eliminated. The crucial point in this procedure is to find the correct particular solutions. Two particular solutions are used. One is the approximate three-dimensional particular solution. The other is obtained under the assumption of local two-dimensionality. In addition, the uniform particular solution is given, from which the uniform second-order solutions may be obtained. Then, we have treated the unsteady problem for delta wings with low aspect ratio and supersonic leading edges. The Mach number range for application of the present theory is from supersonic to low hypersonic values with reduced frequencies up to near unity. The theoretical results derived in this work can be used to calculate the unsteady aerodynamic characteristics of wings having arbitrary airfoil sections.As experimental information for similar conditions is not yet available, we can only compare our results with those of Liu D. D. . For this reason, only the derivation for a flat delta wing oscillating at low frequencies has been carried out and an analytical expression is obtained for the first order expansion of the unsteady velocity potential. In the range of Mach numbers 4 to 8, our results are in agreement with those of Lui D. D. .It is also shown that under conditions of three-dimensional thin wings the second-order theory is valid up to Mδ=1.0, while according to application of the second-order theory to bodies of revolution by Van Dyke, the useful upper limit of M5 is only 0.7. Hence, with Mδ=0.7-1 .0, the principal non-linear effects can be calculated by our second-order theory, while for thin wings the third-order terms connected with heat transfer and entropy change can be ignored.

    本文处理了超音速三元薄翼非定常问题,通过PLK法使二次解均匀有效。首先考虑零攻角或初始攻角时,已知基本定常绕流叠加高-量级的非定常小扰动流,把它线性化。本方法从健全的基本方程出发,使用高马赫数近似,将非定常二次方程化简,其形式与定常二次方程类似,因而有可能利用定常二次理论的方法求解。特解是求解的关键。鉴于精确特解的复杂性,本报告采用了一种近似特解。 本方法适于一般超音速和完全高超音速之间的马赫数区域(约3~8),折合频率可达至1左右。可较精确地估计厚度,初始攻角对非定常气动力,力矩的影响。 目前据我们所知,还没有有关实验数据,只能和一些理论结果进行比较。为此对低频有初始攻角的超音速前缘平板三角翼进行了计算,在马赫数3~8,与D.D.Liu~[6]比较吻合。计算结果表明,三元薄翼二次理论可用到高超音速相似参数Mδ=1.0。

    On the basis of the definition of Gyarmathy and Meyer for the Wilson point, the author derives a new linear equation for the droplet growth function associated with the problem of condensation of supersaturated steam in a Laval nozzle. The curve determincd by the linear equation is a better approximation to the theoretical one than those of Gyarmathy and Meyer. The author also derives a simplified equation for calculating the Wilson points and porides the computational program for this equation. The theoretical...

    On the basis of the definition of Gyarmathy and Meyer for the Wilson point, the author derives a new linear equation for the droplet growth function associated with the problem of condensation of supersaturated steam in a Laval nozzle. The curve determincd by the linear equation is a better approximation to the theoretical one than those of Gyarmathy and Meyer. The author also derives a simplified equation for calculating the Wilson points and porides the computational program for this equation. The theoretical complete Wilson lines for expanding steam in a Laval nozzle with various rates of expansion have been determined. These lines are drown for a pressure from 0.1 bar to 50 bar. The rate of expansion of nozzles are 10~85~(-1), 3×10~3 S~(-1), 10~4S~(-1).

    作者依据G.Gyarmathy和H.Meyer提出的关于膨胀汽流过饱和极限位置的数学模型和分析方法,对无因次液滴生长函数的线性化近似公式作了更加接近于理论解的修正,提出了计算过饱和极限位置的简化公式;并根据该公式说明了确定Wilson点参数的计算方法.作者计算了相应于典型透平叶栅内的膨胀速度的喷管,在压力0.1~50ata,温度5~250℃参数范围内的一组Wilson线.作者将计算结果与试验值进行了比较.并对计算中引起偏差的原因进行了比较详细的分析.作者认为对膨胀蒸汽流的自发凝结问题,在计算中采用经典成核理论可以获得满意的结果.

    Stability is an important target of the quality of an electrical supply in an aeroplane's A.C. power system. In this paper we have presented emphatically the establsihment of the linearized mathematical model of an A.C. power system with a single generator, the program functions of calculating the stability of the power system using computer, and the calculation flow diagram. The effects of the parameters of the voltage regulaotr and the working states of the generator on the stability of the system have also...

    Stability is an important target of the quality of an electrical supply in an aeroplane's A.C. power system. In this paper we have presented emphatically the establsihment of the linearized mathematical model of an A.C. power system with a single generator, the program functions of calculating the stability of the power system using computer, and the calculation flow diagram. The effects of the parameters of the voltage regulaotr and the working states of the generator on the stability of the system have also been discussed. And then the suggestions to improve further feedback compensation loop have been given.

    稳定性是飞机电源系统供电质量的重要指标。本文结合具体调压系统,着重介绍了单台交流电源系统线性化数学模型的建立,用计算机解算电源系统稳定性的程序功能和计算流程框图,讨论了飞机单台电源系统调压器参数和发电机工作状态对系统稳定性的影响,提出进一步改进反馈校正回路的意见。

     
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