The pulses of rotate speed reference of phase and tracking central frequency of filters are provided by reference circuit .

不平衡信号处理部分由基准信号电路和 振动 信号电路组成。基准信号电路 用于 测量转速、为 测量相位提供基准以及为带通滤波器的中心 频率提供 跟踪脉冲。

In this paper the methods of target tracking in frequency domain are studied from two aspects .

本论文从两个方向研究了 频域下的目标 跟踪 测量方法。

Tracking Frequency Based on Frequency Multiplication Phase-locked and Synchronization of Multi-period

基于多周期同步和倍频锁相的 频率 跟踪 技术

In the frequency synchronization part the paper mainly introduces the design of PLL circuit which is used for tracking the power frequency and generating sample trigger pulses .

在电网频率同步部分，文章主要介绍了用于 跟踪电网 频率并产生采样触发脉冲的锁相环电路的设计，并通过实验测试其可行性，最后分析了电源白噪声对锁相输出精度的影响。

An Approach of Light Damping Structure Measurement by Amplitude Tracking in Frequency Domain

结构小阻尼测量的 频域内幅值 跟踪方法研究

An adaptive notch filter with the capability of tracking frequency variation is applied to filter the signal and calculate its frequency .

采用具有 跟踪 频率变化能力的自适应陷波器，对信号进行滤波，以求其频率；

A Phase Locked Loop ( PLL ) with PI controller is adopted to tracking the load frequency and controlling the inverter mode which guarantee the safety of the inverter .

采用PI控制的锁相环（phaselockedloop，PLL）方法，实现了对负载 频率 的 准确 跟踪和对逆变状态的可靠控制，保证了逆变器的安全。

Computer simulation indicates the algorithm can follow the change of system frequency well and carry on the tracking measurement of frequency on the multiple signals at the same time .

计算机仿真结果表明，本算法能较好地跟踪系统频率的变化，能够同时对多路信号进行 频率 的 跟踪测量。

If the systems have not very special requirements on timing tracking this algorithm also can complete joint tracking of frequency and timing .

如果系统对定时估计的要求不是特别 高，该算法还能实现定时 偏移 和 频率 偏移的联合 跟踪。

Based on dual orthogonal digital filters and weighted smoothing phase-difference method an algorithm for tracking instantaneous frequency of power grid is proposed which improves the dual orthogonal digital filter used currently .

基于双正交数字滤波器与加权平滑相位差分法，提出了一种 跟踪电网瞬时 频率的方法，改进了目前基于双正交数字滤波器的电网 频率 跟踪方法。

Methods of Target Tracking in Frequency Domain Based on DSP

频域下的目标 跟踪方法及其在DSP中的实现

The algorithm of cross product automatic frequency control ( CPAFC ) and frequency bin technology is used for tracking larger frequency deviation .

在数字化载波同步环路中，对于具有较大 频率偏移的载波的 跟踪，可以使用叉积自动频率跟踪算法以及频率开槽技术等，本文研究了它们的工作原理。

Tracking of frequency of ultrasonic motor driver

超声波电机驱动源的 频率 跟踪

Here the design of power ultrasonic generator for use in rigid material boring is introduced along with the analysis and study in automatic tracking circuit of frequency driving circuit power amplifying circuit and complete protections .

介绍了一种在脆性材料钻孔中使用的功率超声波发生器的设计方法，分析和研究了 频率自动 跟踪电路、驱动电路、功放电路及其完善的保护功能。

Based on orthogonal transform a new method of tracking power grids frequency has been provided .

基于正交变换，提出了一种新的电网 频率 跟踪方法。

According to actual requirement the adaptive detection algorithm based on multiple time domain features for abrupt faults is improved and realized . ( 3 ) The red-line algorithm in frequency domain is studied and the amplitude tracking of feature frequency components is realized .

研究了频域红线算法的原理，实现了特征 频率成分的幅值 跟踪，提出了基于特征频率的突变故障自适应红线检测算法。

The PI parameters of current loop of the traditional double-loop control strategy are not sensitive to the tracking current frequency and this method makes tracking deviation is too large . So a control strategy based on the PR controller is presented in this paper .

考虑到传统的电流内环、电压外环的双闭环控制策略中因电流环PI参数对 跟踪电流的 频率不敏感，导致电流的跟踪偏差过大，本文提出了一种基于PR控制器的控制策略。

A Load-Current Tracking Frequency Compensation Method for Low Dropout Voltage Regulators

一种 跟踪负载电流变化的LDO 频率补偿方法

Beginning with the diagram it brings forward key techniques including frame synchronization sampling synchronization carrier frequency offset estimation / tracking frequency domain equalization and so on .

为建立这个仿真系统，文章研究了各部分的关键技术：帧同步和采样偏差估计、载波频偏估计和 跟踪、 频域均衡等算法。

Design of Three-Phase Hybrid Step Motor Driver with High Tracking Frequency and High Subdivision

高跟 踪 频率高细分三相混合式步进电动机驱动器设计

The high-accuracy acquisition is achieved by 16-bit A / D and the phase-locked loop synchronization control technology is used for tracking sampling frequency and inhibition spectrum leakage .

选用16位的A/D，实现了对数据高精度采样，并采用锁相环同步控制技术， 动态 跟踪采样 频率，抑制频谱泄露。

Tracking the frequency of six genes linked to personality traits revealed two clear examples of ' birds of a feather flock together ' and ' opposites attract ' .

经研究后发现，有六组基因与人的性格人格的形成密切相关，这清楚的阐释了为何会有“ 人以群分”和“异性相吸”的缘故。

Contrasting with traditional LC oscillation first-class AFC tracking frequency circuit this circuits frequency is stable its phase accurate and the structure the cost do not apparently become complex and high .

与传统的LC振荡器、一级AFC 锁频电路相比，本电路频率稳定，相位准确，而电路结构和成本并未明显复杂与提高。

Frequency auto tracking adaptive frequency and phase combined estimator and its property evaluation

频点自 跟踪自适应 频率相位联合估计器及性能评价

An Algorithm for Tracking Instantaneous Frequency of Power Grid

电网瞬时 频率的一种 跟踪算法

The Study of Challenge Technology of Single Observer Passive Location and Tracking Using Frequency Rate and Differential Direction of Arrival

利用 频率变化率和波达角变化率单站无源定位与 跟踪的关键技术研究

Experiments indicate that it can achieve the precision required where tracking a low frequency sinusoidal signal or a low frequency random signal .

实验表明，该实验装置在 跟踪 低频正弦信号和低频随机信号时，达到了坦克炮控系统的精度要求。

Tracking Doppler Frequency and Its Changing Rate By Means of DFT

用DFT 跟踪多卜勒 频率及其变化率

An adaptive lattice notch filter with the capability of tracking frequency variation is applied to filter the sensor output signal whose frequency amplitude and phase are time-varying based on the random walk model of Coriolis mass flowmeter and its frequency is calculated .

采用能 跟踪 频率变化的自适应格型陷波器对频率、幅值和相位均按照随机游动模型变化的科氏流量计传感器输出信号进行滤波，求其频率；