模态系统

Based on combining switched Lyapunov function and parameter dependent Lyapunov function, a robust H∞ filter with structure switched according to the system model changes was designed for networked control systems with limited bandwidth and polytopic uncertainties.

针对一类通讯受限的不确定网络控制系统，结合切换Lyapunov函数和参数依赖Lyapunov函数方法，提出了一种基于模态切换构造的鲁棒H∞滤波器设计方法。

Based on dynamic stability analysis of the helicopter, the unstable mode and the necessity of installation of Stability Augmentation System were cognized.

在动稳定性计算分析的基础上，认识到定常飞行中的非稳定模态和增稳系统设计的必要性。

In this thesis the development of Noncontact Monitoring Technologies on steam turbine blade are compared and analyzed by the numbers, the theoretical measuring formula of bending vibrant blade is ratiocinated, and the Principle of Modal Analyzing on steam turbine blades are also summarized.

中文摘要：本文系统地比较分析了汽轮机叶片故障监测技术的发展与现状，并对汽轮机叶片弯曲振动的理论测量公式做了简要推导，就模态综合法在叶片振动分析中的应用进行了阐述。

The major research work has been done in the identifications, locations and severities of structure damage.

本文在对国内外结构损伤诊断研究系统归纳与总结的基础上，将振动模态分析技术与人工神经网络技术相结合，来探讨进行结构损伤诊断的方法。

Therefore, the hybrid method was adopted to determine the equivalent material properties. In this paper, the modal testing and numerical analysis were applied to obtain the Frequency Response Function and to calculate the equivalent spring constant and damping ratio of the suspension.

因此本文针对汽车悬吊部分，先以模态试验法与数值分析方法，将悬吊部分以线性弹簧及阻尼来模拟，并使用混合法，结合实验与数值之结果进行参数调整，在此是以FRF Base 来实施参数调整，确立悬吊系统的等效弹簧系数与阻尼系数。

It was designed to use an inertial mid-course guidance with command updates (similar to the AIM-120 AMRAAM), and a dual-mode (active-radar/infrared) seeker for terminal homing.

它的制导系统使用了中段惯性制导加指令修正(类似于AIM-120 AMRAAM)，以及一个双模态寻的器作为末制导。

The results also revealed that the modes of the misaligned rotor system were different from the aligned one.

分析结果还表明不对中转子系统的模态与理想对中系统相比有较大的差别。

Using the measurement system to measure some stators and achieving good results.

利用所开发的测试系统进行一些定子的面内振动模态测试，取得了较好的结果。

From the analysis of automobile vibration sources and the human responses to vibration, a mechanic model of man-chair-vehicle system with 13 degrees of freedom is built by vibration pattern analyzing technology. Using the random vibration theory, the calculating methods are developed for parameters, including vibration pattern, transfer function, wheel transient load, and acceleration of seat, automobile ride quality simulation software is developed.

通过分析汽车振动源和人体对振动的反应，用模态综合技术，建立了十三自由度人－椅－车系统的动力学模型，运用随机振动理论，给出了振动形态、传递函数、悬架动挠度、车轮动载荷、座椅加速度等参量的计算方法，开发了一套&汽车平顺性仿真软件&并利用已有的汽车数据，对汽车行驶时的振动特性进行了仿真，得到了重要结论：发动机与轮胎刚度、阻尼，后桥阻尼对驾驶员座椅处的振动影响不大；驾驶员座椅的垂直刚度增加很大时，对垂直方向振动响应比较大；前桥刚度、阻尼对驾驶员座椅处的振动影响较大；前轮胎刚度对前桥振动影响较大，前轮胎刚度增加，则振动加强；后桥刚度对汽车平顺性有一定影响，后桥刚度减小，则座椅处垂直加速度减小。

Using the software of I-DEAS, the dynamic finite element model of entire reducer was established including gear, ring plate, shaft, bearing and gearbox housing and used to analyze the vibration modal, the time-domain and frequency domain dynamic response and one-third octave velocity grade structural borne noise of double ring gear reducer under dynamic excitation.

利用I-DEAS软件，建立了包括齿轮、环板、传动轴、轴承和箱体的整个减速器系统的动力有限元分析模型，计算了减速器的振动模态、动态激励下的时域和频域响应，以及速度级1/3倍频程结构噪声。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。