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模态截断     
相关语句
  modal truncation
     Considering the incompleteness of measured structural mode shapes, the practical complete modal space theory is used to eliminate the influence of modal truncation error.
     考虑到所测的结构模态是不完备的,应用完备模态空间理论将未测的结构高阶模态用等效高阶模态来代替从而消除模态截断误差的影响。
短句来源
     Modal expansion is adopted to analyze the dynamics model,and the modal truncation method,balanced truncation method and singular perturbation approximation method are used for model reduction,then we can get the low-order model,and the model error by truncation is obtained to provide the reference for the controller design,and the simulation results demonstrate the effectiveness of the method.
     对挠性悬臂板系统动力学模型分析采用模态展开技术,并利用模态截断方法、基于平衡实现的截断方法和平衡奇异摄动截断方法对挠性悬臂板进行了模型降阶,得到板系统的低阶模型,然后分析了降阶模型幅值误差。 这为基于智能结构控制悬臂板控制器的设计提供了参考,数字仿真结果验证了方法的可行性。
短句来源
     This result supplies reasonability for the previous simple Galerkin modal truncation of this equation from the viewpoint of dynamics.
     此结果从动力学角度为以前对此方程的简单Galerkin模态截断提供了合理性。
短句来源
     Seismic Analysis of the Primary-secondary Coupling Structural System with Multi-connections by Using Modal Truncation Technique
     利用模态截断技术分析多点连接主次结构耦合系统的地震反应
短句来源
     To study the effect of modal truncation on tire compliance,a modal testing of a 195/60R14 tire is performed and the modal parameters of first 17 modes are extracted Tire compliance is calculated by using different number of modes acquired by exponential function fitting The error is less than 10% when using first ten modes and will be less than 5% when first twelve modes are used
     对 1 95 / 6 0R1 4轮胎进行了模态试验 ,得到前 1 7阶的模态参数 ,计算出轮胎柔度 ,应用指数函数拟合截取不同阶次得到的轮胎柔度 ,分析研究了模态截断对轮胎柔度的影响 ,当截取前 1 0阶模态时 ,模态截断误差小于 1 0 % ,截取前 1 2阶时 ,误差小于 5 %。
短句来源
更多       
  mode truncation
     This paper studies the reduced-order robust controller design of flexible satellite attitude. Mode truncation, H∞loop-shaping and H∞balanced truncation are being used during the controller designing.
     研究多挠性充液卫星姿态运动的低阶鲁棒控制器设计问题.综合应用模态截断、H∞回路成形和H∞氏平衡截断方法设计低阶鲁棒控制器.模态截断获得适当阶数的卫星姿态运动模型;
短句来源
     (2) mode truncation based on energy criterion can improve analysis accuracy.
     (2)由能量判据作出的模态截断能够提高结构振动分析的精度;
短句来源
     To avoid the overflow of the control and observation caused by using mode truncation to design controller,the flexible structure model is transformed into the characteristic model described by a second-order difference equation with unknown coefficients,then a direct adaptive fuzzy predictive control method is presented for the flexible structure position holding.
     为了避免用模态截断方法设计控制器时所引起的控制和观测溢出问题,把柔性结构模型转化为用含有未知系数的二阶差分方程描述的特征模型,对此模型提出了当柔性结构实现位置保持时的直接自适应模糊预测控制方法.
短句来源
     The simulation result shows that the low-order model obtained by using mode norms, which keeps relatively important modes, is the better approximation of the original system than that of direct mode truncation, and is helpful to suppress the vibration of structures better.
     仿真结果表明,随着压电作动器的配置不同,结构的降阶模型中应保留的模态也应随之发生变化,利用所提出的方法获得的降阶模型保留了相对较重要的模态,它比直接模态截断方法更逼近原系统,是一种适用于结构全局振动控制的模型降阶方法;
短句来源
     Simulation results show that the H 2 norm model reduction is more appropite than the general mode truncation method.
     仿真算例表明 ,基于H2 范数的模态缩减法明显优于普通的模态截断方法。
短句来源
更多       
  model truncation
     This paper deduces the finite element formulation of intelligent plate containing distributed Piezoceramics on its surface using Hamilton principle adopting finite element model of 12 DOF with 2 electrical DOF, and reduces the order of intelligent plate using the following process in turn: Model truncation, Minimal realization, Balancing reduction.
     本文针对压电智能板结构,采用12个位移自由度、2个电自由度的有限元模型,利用Hamilton原理,详细推导了压电智能板结构的有限元运动微分方程; 依次利用模态截断法、最小实现、平衡降阶法对压电智能板结构的系统方程进行了降阶处理;
短句来源
  truncated modes
     The energy response curve is shown that the energy value is altered in echelon. It is found that a large enough number of truncated modes is needed for the high arch dam.
     且拱坝结构在时域内最大能量响应值与所取模态截断阶数之间的关系表明,对于高拱坝这样的模态密集型系统,必须取较多数目的模态参与叠加,才能保证能量收敛的计算精度。
短句来源

 

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  modal truncation
Dynamic modeling and modal truncation approach for a high-speed rotating elastic beam
      
Since using lower-order transverse modes for modal truncation obviously can cause error, addition of more transverse modes may improve the result.
      
The effect of modal truncation and means to approximate corresponding dynamic displacement residuals are discussed for linear, anisotropic solid bodies and structures with general damping.
      
In this paper we examine order reduction of parabolic systems using modal truncation.
      
In the common method of modal truncation controllability constraints are first reformulated as an infinite sequence of moment equations, which is then truncated to a finite set of equations.
      
更多          
  mode truncation
A new six-mode truncation of the Navier-Stokes equations on a two-dimensional torus: A numerical study
      
A model obtained via a six-mode truncation of the Navier-Stokes equations for an incompressible fluid on a two-dimensional torus is studied.
      
A five-mode truncation of the Navier-Stokes equations on a three-dimensional torus
      
In the former case a behavior is found which is quite similar to the ones of the Lorenz model and of a 5-mode truncation of the two-dimensional Navier-Stokes equations previously studied.
      
Sequences of infinite bifurcations and turbulence in a five-mode truncation of the Navier-Stokes equations
      
更多          
  model truncation
However, these are the common numerical artefacts due to model truncation.
      
The scalar residuals appear to be dominated by the model truncation at SH degree 100.
      
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