查询词典 inertial frame

Adopting inertial coordinate frame simplifies modeling process and the dynamic inflow model can easily be incorporated without multi-blade coordinate transformation.

本文基於惯性坐标系的旋冀气弹建模方法简化了建模，方便地嵌入了动态入流模型。

Observed from an inertial reference frame, the net force on a particle is proportional to the time rate of change of its linear momentum: F = d / dt.

从惯性参照系看，作用在物体上的外力与冲量的时间变化率成比例。

This model is different from the structural dynamics model in a non-inertial reference frame with large overall motions known.

本文从力学基本原理出发，分析了刚柔耦合零次近似理论失效的原因，深入研究了有大范围运动的柔性体变形场的描述，建立了刚柔耦合一次近似的动力学模型；然后利用上述模型，从非惯性系下的结构动力学问题和大范围运动为自由的刚柔耦合动力学问题这两个层次上进行了刚柔耦合动力学建模理论与性态的研究，采用理论和实验相结合的手段来检验了一次近似刚柔耦合动力学模型的正确性。

In 1987, Kane et al.〓investigated the dynamics of a cantilever beam in a non-inertial reference frame.

建模时如果不考虑这种因素的影响，将会导致错误的结论。1987年，Kane〓对非惯性系下的旋转弹性梁的动力学特性进行研究，指出在转速较大的情况下，按零次近似建模理论进行仿真计算会得到梁的挠度趋于发散失稳这样一个错误的结论。

In chapter 4, dynamic behaviors of a cantilever beam in a non-inertial reference frame are investigated, and the differences of the dynamic property between the zero-order model and the proposed coupling model are revealed.

第四章研究了非惯性系下柔性梁的动力学性态。

The second part, we select the coordinate system for the sun to study the Earth's revolution, when the introduction of the Coriolis force on the impact of the spacecraft, and further selected for the reference system on Earth, the establishment of coordinate system, taking the Earth's non-inertial reference frame, the Coriolis profit impact of forces on the spacecraft.

第二部分，我们选取太阳为坐标系，研究地球公转时引入的科里奥利力对飞船的影响，并且进一步选取地球为参考系，建立坐标系，考虑地球为非惯性系时，科里奥利力对飞船的影响。

In this dissertation,the higher order rigid-flexible coupling dynamic model,which isdifferent from the structural dynamics model in the non-inertial reference frame withlarge overall motions known,which takes the coupling between large overall motionsand deformation motion into account with large overall motions being free,and ofcourse which is more accurate than the zero order model,is established for the first time,based on mechanical principles.

本文从力学基本原理出发，针对大范围运动为自由的刚-柔耦合系统，首次建立了较零次近似更精确的高次耦合动力学模型，与大范围运动为已知的非惯性系下的耦合动力学模型不同，进一步考虑了大范围运动和变形运动的相互耦合作用。

For system simulation, this thesis puts forward several improvements in realization, such as state estimating on a non-inertial reference frame, choosing different sets of motion model for different sensors, improving data association by use of feedback fusion result, using multi-model during temporal registration.

例如将目标状态滤波选择在非惯性坐标系下；针对不同传感器建立不同的目标运动模型集；利用多传感器融合处理后的信息反馈到单传感器来改善数据关联效果；在多传感器融合的时间配准过程中，对目标状态估计采用多模型方法。

While the frequency can be as high as N when the particle motion is vertical, it cannot be lower than the Coriolis frequency f. In this limit, the particle motion is horizontal in 'inertial' circles, expressing the tendency for steady rectilinear motion with respect to a nonrotating reference frame.

虽然频率可高达为N时，粒子的运动是垂直的，它不能低于科氏频率楼在此限制，粒子议案是水平在'惯性'界，表达为稳定直线运动的趋势关于一nonrotating参照系。

To implement this guidance law, the thesis purposed one new target state model and adaptive algorithm for radar homing missile attacking maneuvering target, which is based on the slowly changing of the tangential acceleration and the normal acceleration of the spiral maneuvering and snaking maneuvering in target trace frame coordinate system, and on that the most of them equipped with Strapdown Inertial Navigation System, to meet the demand of the advanced homing missile to target state, It can estimate target position, velocity and acceleration accurately by real-time processing.

为了实现该制导律，重点针对先进自寻的制导律对目标机动运动状态的需求和导弹系统大都具有捷联惯导系统的条件，基于目标螺旋机动和蛇形机动的切向加速度和法向加速度在目标轨迹活动标架上缓变的特点，本文提出了一种建立在目标轨迹活动标架上的运动状态方程和扩展观测方程的自适应估计算法。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。