Research on shunt active power filter based on a control method of PI conversation of energy 基于能量守恒PI控制方法的有源电力滤波器研究
Research of Four-wire Three-phase Active Power Filter based on Fuzzy-PI Control Dynamic model of 3-RRR parallel mechanism for parameter identification 模糊PI控制三相四开关并联型APF研究3-RRR并联机构动力学参数辨识模型
Fault Estimation Based on PI Strong Tracking Filter 基于比例积分强跟踪滤波器的故障估计
The inputs of the Pi-Sigma net classifier are the feature vectors which are extracted by a constant Q bandpass filter bank. Pi-Sigma网络分类器的输入为一个常Q带通滤波器组作特征提取形成的特征向量。
Fashionable Real-time Databases at the present time, PI and PHD, provide some general data process functions, such as unit conversion, filter, and evolution. 目前流行的实时数据库系统,如OSI公司的PI、Honeywell公司的PHD,都提供常用数据处理过程,如量程转换、滤波、开平方、超限处理等。
This PFC was realized by employing sliding-mode variable-structure inner current loop control and outer voltage loop PI control with digital low-pass filter to achieve high performance. 提出了采用滑模变结构电流内环与由PI调节器和数字低通滤波器组成的电压外环相结合的控制系统,以实现高性能高速度的功率因数校正。
Fuzzy-PI Control of a New Hybrid Active Power Filter 一种新型混合型有源滤波器的模糊PI控制
The methods for speed identification based on Kalman filter and model reference adaptive system are deeply investigated in this thesis, a new PI adaptive method of speed identification based on MRAS is put forward. 本文研究了基于卡尔曼滤波算法的速度辨识法和基于异步电机模型的模型参考自适应法,针对模型参考自适应法提出了一种PI自适应速度辨识法。
In this DPLL a Proportion-Integral ( PI) control algorithm based block was substituted for some conventional digital filter based ones. And it is characteristic of its simple structure, flexible control method, high phase tracking precision, excellent loop performance and easy system integration, etc. 该锁相环以数字比例积分控制取代了传统的一些数字环路滤波控制方法,具有电路结构简单、控制灵活、跟踪精度高、环路性能好和易于集成的特点。
Recursive integral PI for current control of hybrid active power filter 基于递推积分PI的混合型有源电力滤波器电流控制
Due to the traditional PI controller can only deal with given direct current signal, and can not control cycle harmonic signal well, the performance of shunt hybrid active power filter used traditional PI controller is not satisfied. 在并联混合型有源电力滤波器控制中,由于传统PI控制只能对直流给定信号进行无差调节,对周期量谐波滤波效果不够理想。
During the design of system software, I advance arithmetic of PI and median filter, and offer program flow chart. 在软件设计中,提出了PI算法和中值滤波算法,并给出了程序流程图。
Due to the influences of detection precision, time delay of instruction current calculation and phase displacement of output filter, harmonic elimination using active power filter ( APF) with traditional PI controller is not ideal. 在采用有源电力滤波器(APF)消除谐波的过程中,由于滤波器的检测精度有限、指令电流计算延时和输出滤波器相移等因素的影响,传统的PI控制滤波效果不够理想。
DC-line active parameter Adc which can remain DC-link voltage invariable get by using RLS filter overcome hard to get parameters and much ripple in compensation current of PI control. 应用RLS滤波器得到维持直流母线电压恒定的直流侧有功系数Adc,克服了传统PI控制中参数难以得到且由于参数过于敏感而导致补偿后电流纹波太大的问题。
This paper analyses the characteristics of the control error of shunt active power filter ( APF), and points out that the integral part of PI is periodical, which is the demerit of using conventional PI control. 首先分析了并联有源滤波器误差信号的特点,并指出了传统PI控制应用于并联有源滤波器的不足是积分环节的作用具有周期性。
A novel stator flux observer model of DTC control system, the model substitutes one order low-pass filter for pure integration unit and adopts PI close-loop calibration unit to compensate the DC drift error of stator flux observer were introduced. 现提出了一种新型的直接转矩控制系统的定子磁链观测模型,采用一阶低通滤波器替换u-i模型中的纯积分环节,并引入PI闭环校正环节来补偿磁链观测的直流偏置误差。
The software including main program and interrupt service program, most work is done in interrupt services program, including phase current detection, data processing, PI regulator, sampling filter, zero compensation and so on. 程序由主程序和中断服务子程序构成,主体工作由中断服务程序完成,包括相电流检测、数据处理、采样滤波、零点补偿等。
Experimental results showed that the thermal stability, high temperature stability PSA fiber filter is better than PMIA, PI fiber filter; basalt yarns and high temperature processing of the mechanical properties of the composite filter is superior to glass fiber yarn and media. 热稳定性试验结果表明,PSA纤维滤料的高温稳定性优于PMIA、PI纤维滤料;玄武岩纱线及复合滤料的高温处理后力学性能优于玻璃纤维纱线及其滤料。
Then, in view of the microgrid islanding and grid-connected mode, this thesis uses the traditional PID control to design the control system, including the selection of the filter parameters and the isolation transformer, and the design of the PI control parameters, respectively. 然后,针对微电网孤岛运行和并网运行两种模式,采用传统PID控制分别设计了控制系统,进行了相关参数的选取,包括滤波参数的选取、隔离变压器的选取以及PI控制参数的设计。
We choose Unscented Kalman Filter ( UKF) to estimate the slow variables, and use the PI control algorithm to realize the control changing from rapid firing to slow firing and from firing to rest. 本文采用无迹卡尔曼滤波器(UnscentedKalmanFilter,UKF)实现慢变量的估计,并采用PI控制算法实现快放电到慢放电的控制以及放电状态到静息的控制。
Due to the research on the parameters selection limits this paper researches on the selection method of the parameters of the filter and bus capacitor. And then, analyzes the methods of finding PI parameters to meet good system performance. 在分析了参数设计限制的基础上,分析了滤波环节以及母线电容的选取方法,并通过系统整定的方法研究了电压电流环PI参数的选择方法以得到最佳系统性能。
This chapter describes Predictive PI controller design by using the Linear Phase Advance Filter to replace the Forecast item, and the practical application of this filter simulation and analysis. 介绍了将预测项用线性相位超前滤波器来代替的PPI控制器的设计,并对这种滤波器的实际应用进行仿真研究与分析。
Using PI control principle, realize the loop filter, set parameters according to actual conditions. 然后运用PI控制原理,实现环路滤波,根据实际情况设定参数。
Moreover, this paper carried a Predictive PI Controller designing by using Linear Phase Advance Filter as predictor. Firstly, the Predictive PI controller design for Self-regulating system is introduced. 另外,还进行了预测项采用线性相位超前滤波器的PPI控制器的设计。首先,进行了有自衡热工过程PPI控制器的设计。