提出一种抑制抖振的新方法。
A new method of reducing chattering in sliding mode control is proposed.
桥梁的抖振分析，有频域和时域两大类方法。
The buffeting of Bridges can be analyzed in frequency domain and in time domain.
此外，采用全局二阶滑模控制可削弱抖振现象。
The global second order sliding mode control approach is applied to avoid chattering phenomenon.
气动导纳函数是桥梁抖振分析中的重要气动参数。
Aerodynamic admittance was an important aerodynamic factor in the analysis of buffeting of Bridges.
并采用一非线性微分控制消弱了系统的抖振现象。
A nonlinear derivative control is introduced to avoid system chattering.
因此，解决桥梁抖振问题是桥梁界人士共同关心的事。
Therefore, to solve the problem about buffeting of bridge is concerned by people engaged in bridge engineering.
抖振分析的准确性，取决于抖振力和结构模型的准确描述。
Naturally, the accuracy of buffeting analysis lies on the buffeting force spectrum and the model of the structure.
利用机翼升力面理论分析了桥梁抖振升力沿跨向的相关函数。
The span wise coherence function of the aerodynamic lifting force in the buffeting response of bridges is analyzed by using the lifting surface theory of airfoils.
准确预测抖振响应的一个重要环节是对抖振荷载的恰当描述。
Describing the buffeting gust load properly is an important section to predict the buffeting response.
对置于某一超高层建筑顶部的钢质天线的抖振响应进行了研究。
The research of the buffeting response of the steel antenna at the top of one super-high rise building is presented in this paper.
大跨度桥梁频域及时域抖振分析中通常仅考虑主梁的脉动风效应。
Only wind action of deck is generally taken into account in frequency-domain and time-domain buffeting response analysis for long-span bridge.
由于它能使滑动模态实现希望的频率整形，故能有效地抑制抖振。
Frequency shaping of sliding mode can be achieved and chattering can be reduced well via this new metliod.
为斜拉桥施工阶段最大双悬臂状态抖振安全可靠度分析提供了依据。
These probabilistic characteristics provide the basis for the safe reliability analysis of cable stayed buffeting responses during the longest double cantilever construction stage.
然而滑模变结构控制带来的高频抖振是其应用到实际系统中的障碍。
However, the chattering with high frequency in sliding mode control systems is barrier for the application to the practice engineering problems.
桥梁风荷载很复杂，在桥梁初步设计阶段没有必要进行精确地抖振分析。
It is impossible and costly to carry out detailed buffet analysis in the bridge conceptual phase and many short span bridge designs because the wind load on bridge is complicated.
根据桥梁抗风计算的需要，提出了一整套斜拉桥抖振时域分析的实用方法。
According to the demand of wind-resistance analysis for the Bridges, a full set of practical method of flutter time analysis is brought forward for cable-stayed Bridges.
负载推力观测器和扰动前馈补偿的设计有效地削弱了变结构控制产生的抖振。
The chattering of the VSC system is effectively minimised by designing a load thrust observer and a disturbance feed forward compensation.
之后，设计了双曲正切函数的鲁棒补偿项，从而得到一种没有抖振的平滑控制输入。
Then, a robust compensation term is developed in form of hyperbolic tangent function to obtain a smooth control input without chattering phenomena.
通过构造动态滑模输出，使得系统零动态稳定；采用全局二阶滑模控制来消除抖振。
Valid dynamic sliding mode output that guarantees the system stable zero dynamics was constructed, and a global second order sliding mode control was adopted to circumvent chattering phenomena.
多重调谐质量阻尼器(MTMD)主要被用来控制结构的侧向振动与大跨桥梁的抖振。
Multiple tuned mass dampers (MTMD) are developed mainly for the purpose of suppressing horizontal motion of structures and buffeting of bridge structures.
气动导数是大跨桥梁结构颤振和抖振分析中确定颤振临界风速和抖振响应的重要依据。
Flutter derivatives play very important roles for determining the flutter critical wind speed and buffeting responses of long-span Bridges.
通过系统状态预估及对状态运动的分析，设计了可以完全消除系统抖振的滑模控制器。
After state preestimate and state movement analysis, a discrete sliding mode controller which can essentially avoid the chattering phenomenon is designed.
气动导数是大跨桥梁结构颤振和抖振分析中确定颤振临界风速和抖振响应的重要依据。
In this paper, the flutter derivatives of a thin plate model under the simultaneous actions of wind and rain are identified by using the Covariance-Driven Stochastic Subspace Identification method.
选择适当的动态不连续控制律保证了系统状态在有限时间到达滑模面，并有效的削弱了抖振。
An appropriate control law was selected that forces the system states to reach the sliding manifold in finite time and has low chattering in the sliding motion.
设计的控制器不仅避免了一般变结构控制中的抖振，而且具有实现简单、工程化容易的优点。
The controller designed had no vibration in general variable control, which was easy implement in engineering.
考虑风与膜结构的耦合作用，研究索膜结构在顺风向和垂直向风作用下的抖振响应规律及特性。
Considering wind-structure interaction, cable-membrane structure buffeting analysis under horizontal and vertical wind has been carried out in this study.
为了方便对实际桥梁进行线性和非线性时域抖振分析，作者还编制了大型有限元结构计算程序。
A structure analysis program for FEM is worked out to analyzing linear and nonlinear buffeting behavior in time domain.
为了方便对实际桥梁进行线性和非线性时域抖振分析，作者还编制了大型有限元结构计算程序。
A structure analysis program for FEM is worked out to analyzing linear and nonlinear buffeting behavior in time domain.
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