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空间飞行器
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  spacecraft
    ON DYNAMIC FEEDBACK LINEARIZATION OF SPACECRAFT DYNAMICAL MODELS
    空间飞行器动力学模型的动态反馈线性化
短句来源
    This paper expounds the problem on eigenvalue reduced order for flexible umltibody system model, and derives the eigenvalue modal reduced order oriterion and calculation steps based on Riccati iteration algorithm in accordance with attitude dynamics of flexible spacecraft system.
    详细研究了多柔体系统动力学模型的特征值降阶问题 ,针对挠性空间飞行器系统的姿态动力学方程 ,推导出基于Riccati迭代算法的特征值模态截断准则和计算步骤。
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  “空间飞行器”译为未确定词的双语例句
    There exist a class of structures,such as aricrafts,automobiles and ships,which belong to the free-free structures.
    空间飞行器和车辆等一大类结构属于自由-自由结构。
短句来源
    dentification of structural modal parameters using driven-base excitation is a modal analysis method of practical significance in development of space vehicles.
    利用基础激励辨识结构模态参数的方法是一种在空间飞行器的研制中具有工程意义的模态分析方法。
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  spacecraft
This collection can be used to test spacecraft production materials, in order to determine their resistance to biodegradation.
      
Studying Stability of the Flexible Spacecraft with a Discrete Control System
      
Stability of the spacecraft was considered with regard for its elastic structural oscillations arising under discrete control.
      
Consideration was given to the possibility of estimating jointly the motion coordinates and parameters of the elastic spacecraft using algorithms based on the discrete Kalman filtering and the theory of testing statistical hypotheses.
      
Design of the Suboptimal Profiled Relay Control of Orientation of the Spacecraft Having Elastic Structural Elements with Regard
      
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  spacecrafts
Anomalous effects in dopant distribution in Ge single crystals grown by the floating zone technique aboard spacecrafts
      
Specific features of Ga-dopant distribution in Ge single crystals grown by the floating zone technique from lightly and heavily Ga-doped Ge melts aboard the Photon spacecrafts have been studied.
      
The mechanisms of the MHD effect on the properties of the grown crystals are discussed as well as the perspectives of performing analogous experiments aboard spacecrafts.
      
Computed γ-ray numbers and spectra are consistent with those of terrestrial γ-ray flashes (TGFs) observed aboard spacecrafts.
      
Experimental studies of the response of midlatitude ionospheric D region to remote launches and flights of spacecrafts using par
      
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There exist a class of structures,such as aricrafts,automobiles and ships,which belong to the free-free structures.This paper addresses the computational problem of the vibration mode shape derivatioves with respect to design parameters.An improved modal superposition method for mode shape derivatives is proposed,in which the contribution due to the unavailable mode shapes to the derivatives of mode shapes under consideration is explicitly and accurately expressed using the available mode shapes and the system...

There exist a class of structures,such as aricrafts,automobiles and ships,which belong to the free-free structures.This paper addresses the computational problem of the vibration mode shape derivatioves with respect to design parameters.An improved modal superposition method for mode shape derivatives is proposed,in which the contribution due to the unavailable mode shapes to the derivatives of mode shapes under consideration is explicitly and accurately expressed using the available mode shapes and the system matrices.A shift in eigenvalues is introduced to deal with the singularity of the stiffness matrix and a proper shift value can speed the convergence of the algorithm presented in this paper.A numerical example with one rigid mode is given to illustrate the effectiveness of the present method.

空间飞行器和车辆等一大类结构属于自由-自由结构。本文讨论这类结构的振动模态一阶导数计算问题,提出了一种改进的截尾模态展开法,将未知模态对模态导数的贡献用已知模态和系统矩阵来表达。针对刚度阵奇异问题,提出了移位措施,通过选择合适的移位系数,不仅解决了奇异问题,而且加速了算法的收敛速度。给出了一个数值例子,算例表明本文方法十分有效。

dentification of structural modal parameters using driven-base excitation is a modal analysis method of practical significance in development of space vehicles.A systematic exploration is presented in this paper.The theoretic Frequency Response Function under driven-base excitation, which is similar to those of tradinon methods, is derived.So the existing modal analysis system can be used to identify modal parameters under driven-base after a little algebraic modification of measured data.It is indicated that...

dentification of structural modal parameters using driven-base excitation is a modal analysis method of practical significance in development of space vehicles.A systematic exploration is presented in this paper.The theoretic Frequency Response Function under driven-base excitation, which is similar to those of tradinon methods, is derived.So the existing modal analysis system can be used to identify modal parameters under driven-base after a little algebraic modification of measured data.It is indicated that the method of driven-base has the same reliability as other traditional methods through computer simulation, cantilever tests and practical application.

利用基础激励辨识结构模态参数的方法是一种在空间飞行器的研制中具有工程意义的模态分析方法。文中对这一方法做了较为系统的探讨,推导出了基础激励下频响函数的数学模型,其形式类似于传统方法中相应的公式,因而只需对测量数据稍作代数修改,即可利用现成的模态分析系统进行基础激励下模态参数的辨识。通过计算机仿真、悬臂梁试验及工程实例的综合分析,表明基础激励方法在工程应用中具有与其他传统方法同等的可靠程度。

The linearization problem of spacecraft nonlinear dynamical models is studied is this paper By using the methods of differential geometry and of feedback linearization,the fact that the nonlinear dynamical models of spacecrafts with constant direction thrust,which be trajectoryattitude parameters coupling,can be exact linearized by 2 order dynamic compensator/augmented state feedback/augmented diffcomorphism is proved,the step by step algorithm of dynamic feedbak linearization of spacecrafts proposed,the...

The linearization problem of spacecraft nonlinear dynamical models is studied is this paper By using the methods of differential geometry and of feedback linearization,the fact that the nonlinear dynamical models of spacecrafts with constant direction thrust,which be trajectoryattitude parameters coupling,can be exact linearized by 2 order dynamic compensator/augmented state feedback/augmented diffcomorphism is proved,the step by step algorithm of dynamic feedbak linearization of spacecrafts proposed,the concrete forms of state feedback/disscomorphism realizing linearization is given So the problem of spacecraft control system design is transformed to that of linear systems

本文研究了空间飞行器非线性动力学模型的线性化问题。利用微分几何方法和反馈线性化理论,本文证明了推力方向相对体系不变,即受有“常方向推力”作用限制的空间飞行器的轨道—姿态耦合非线性动力学模型可用二阶动态补偿器/增广状态反馈/增广状态微分同胚变换实现精确线性化,提出了飞行器动态反馈线性化的分步算法,并给出了实现线性化的状态反馈/微分同胚的具体形式,从而将飞行器控制系统设计问题转化为线性系统问题

 
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