• The system uses time-frequency tracking loops to extract phase errors from data subcarriers with frequency interpolation to compensate for the estimated carrier frequency offsets.

    该方法使用了时频同步跟踪环路,从数据子载波提取相位误差,并利用频域插值补偿多个用户的估计频偏。

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  • The amount of the dynamic lag errors not only is concerned with the tracking system, but also concerned with the moving characteristics of target.

    动态滞后误差的大小不但与跟踪系统有关,还与目标运动特性有关。

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  • By theoretical analysis, the fuzzy variable structure control system is proved to be globally stable, with tracking errors converging to a neighborhood of zero.

    通过理论分析,证明了模糊变结构控制系统是全局稳定的,跟踪误差可收敛到零的一个邻域内。

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  • The target tracking system errors analysis models are derived from the tracker algorithm.

    从系统的跟踪算法中导出目标跟踪系统误差分析模型。

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  • To improve the tracking speed and control effects of the generator, the feedback system includes indirectly the future information of the tracking errors.

    反馈系统包含了跟踪误差的未来信息,以便改善发电机的跟踪速度和控制效果。

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  • The reasons of five error sources including vertical axis, horizontal axis, sight line coder, TV undershooting value which can result in TV tracking system errors are analyzed.

    分析了电视跟踪系统的垂直轴、水平轴、视轴、编码器、电视脱靶量五个误差源产生误差的原因,探讨了误差的取舍方法及相应的计算公式。

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  • The robust trajectory tracking control strategy accounts for model errors and external disturbances using linear feedback theory for the non-linear system, which ensures system stability and li.

    利用非线性系统的线性反馈理论,考虑动力学建模的模型误差和外界干扰等不确定因素,提出了一种鲁棒轨迹跟踪控制策略。

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  • The continuous wave radar is the main tracking equipment for trajectory observing at present. Estimation and calibration of system errors have important significance.

    连续波雷达是目前外火箭轨道测量的主要高精度设备,用数学方法估计和修正其系统误差有特别重要的意义。

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  • By using Lyapunov stability theorem, both the stability of closed-loop system and the asymptotical convergence of tracking errors are ensured.

    李亚普诺夫稳定性定理保证了闭环系统的稳定性及跟踪误差的渐近收敛。

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  • Through the theoretical analysis, all of the signals in the closed-loop system are proven to be bounded, while the output tracking errors converge to a small neighborhood of the origin.

    通过理论分析,证明了闭环系统所有信号是有界的,输出跟踪误差收敛到原点的一个小邻域内。

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  • Finally, the paper gives out the tracking ripple errors about the feedback system of the acceleration observer.

    最后给出了有、无加速度观测器反馈时系统跟踪晃动误差曲线。

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  • Extended Kalman Filter is an efficient tool for mobile robot position tracking, but it suffers from linearization errors due to linear approximation of nonlinear system equations.

    扩展的卡尔曼滤波定位方法是一个常用的位置跟踪方法,但是在对非线性系统方程进行线性化近似过程中引入了线性化误差。

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  • BP neural network system errors modifying method improves the precision than globe function method about 20% and may be used in three-axis photoelectric tracking system.

    BP神经网络的系统误差修正方法的修正精度比球谐函数法提高约20%,有望用到球谐函数法不适用的三轴光电跟踪系统的系统误差修正中。

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  • An innovative laser beam tracking system is proposed to eliminate the tracking and feedback errors. The open probe design of the AFM makes the operation in liquid convenient and easy.

    采用全新的光路追踪方案与探针扫描方式,消除了测试过程中横向扫描和纵向反馈带来的误差,开放式的探头设计使液相操作更为便捷。

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  • The relationship of the steering range of FSM and the errors corrected, the detector output and objective error, tracking control system input are analysed.

    并分析了反射镜作用范围与需要校正的误差的关系,跟踪探测器输出误差信号与物方跟踪误差,以及与跟踪镜控制量的关系。

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  • The relationship of the steering range of FSM and the errors corrected, the detector output and objective error, tracking control system input are analysed.

    并分析了反射镜作用范围与需要校正的误差的关系,跟踪探测器输出误差信号与物方跟踪误差,以及与跟踪镜控制量的关系。

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