1) structural perturbation
结构摄动
1.
In order to solve the problem,the dynamic equation of the stator is solved with the structural perturbation theory,then a method is found by resolving the equation,thus adjusting the two modal f.
针对材料不均匀或加工误差引起的两相模态频率不一致的问题,利用结构摄动理论,通过求解定子的动力学方程,找到了调节两相模态频率一致性的方法。
2.
The robust stability of time_lag systems with structural perturbation is investigated.
研究结构摄动的滞后系统的鲁棒稳定性。
3.
Although LQG(LinearQuadraticGaussian) method has been much used in robust control of a structural perturbation system, we found that improvement could be achieved by making the eigenvector of closeloop control system as closely orthogonal as possible to two matrices to be named later.
提出了结构摄动系统鲁棒控制器设计的“正交特征向量法”,给出了系统结构摄动完全被抑制的充分条件。
2) unconstructed perturbations
非结构摄动
1.
Presents the sufficient conditions for asymptotic stability of systems respectively when uncertain parts are unconstructed perturbations and highly constructed perturbations, using the transcendental inequality and the matrix measure and the matrix norm, illustrates the conservatism of the conditions given than that given in the literature with a numerical example.
利用超越不等式和矩阵测度及矩阵范数的性质 ,分别给出了当系统的不确定部分是非结构摄动和强结构摄动时系统渐近稳定的充分条件 。
3) highly constructed perturbations
强结构摄动
1.
Presents the sufficient conditions for asymptotic stability of systems respectively when uncertain parts are unconstructed perturbations and highly constructed perturbations, using the transcendental inequality and the matrix measure and the matrix norm, illustrates the conservatism of the conditions given than that given in the literature with a numerical example.
利用超越不等式和矩阵测度及矩阵范数的性质 ,分别给出了当系统的不确定部分是非结构摄动和强结构摄动时系统渐近稳定的充分条件 。
4) structural perturbation approach
结构摄动法
5) structured perturbation
结构型摄动
1.
Given a family of polynomials with structured perturbations,and a stability region in the complex plane,whether the family has invariant root numbers with respect to the interior,the boundary and the exterior of the region? The peper answers the so-called invariant inertia question.
给了一个结构型摄动多项式族以及复平面上的稳定性区域,是否这个族在这区域的内部,边界与外部有着不变的根的数目?这是所谓的不变惯性问题,本文将予回答。
6) Structured LTI perturbation
结构LTI摄动
补充资料:长期摄动
长期摄动 secular perturbation 天体在运动过程中,除了受中心主天体的引力作用外,还受到周围其他天体、介质等等诸多因素的作用,这些作用与中心体的引力相比是很小的,因此称为摄动。天体在摄动作用下,其坐标、速度或轨道要素都产生变化,这种变化成分称为摄动项。长期摄动是指天体的坐标、速度或轨道要素的摄动量中随着时间而单调增加或减少的部分,又称长期摄动项。长期摄动反映了天体运动轨道随时间演化的粗略规律,对于研究天体的演化过程和整个力学系统的宏观图像和稳定性有很重要的意义。18世纪以后,许多天体力学家都在研究大行星的运动轨道是否有长期摄动,并且证明,在精确到一阶、二阶小量的情况下大行星轨道大小不会有长期变化。人造天体运动理论中,长期摄动的存在与否是直接影响人造天体寿命的重要因素,例如由于地球大气阻力的长期摄动存在,可能导致人造地球卫星的轨道逐渐变小,最终落入大气层而坠毁。 |
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