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:介绍一种以Atmel公司的单片机 ATmega324p为控制核心,结合数字温度传感器DS18B20和 INTEGRAT10N
公 司的无线收发芯 片 IA4421的数 字化 无线温度传感器的设计 。该设计频段(433 MHz ISM)无 需 申请 即可使 用测 温范 围为
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4o~95℃ ,分辨率为 0.062 5℃ ,工作频率 433 MHz,接收灵敏度为 109 dBm,最 大发射功 率 8 dBm,传输距 离 200 m,采和
电池供 电。重点介绍该 系统 的硬件
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本文主要介绍的是采用直接数字频率合成的短波信号发生器,它主要以微电脑控制部分、直接数字频率合成(DDS)部分、数字锁相环频率合成部分、背光液晶显示部分、功率放大部分等组成。该软件系统采用菜单形式进行操作,操作方便明了,增加了很多功能。它通过启动DDS后,把内存缓存区的数据送到DDS后输出相应的频率,并把数据转换为BCD码,送到液晶显示器进行显示。该系统输出稳定度、精度极高,适用于当代的尖端的通信系统和精密的高精度仪器。-This paper describes the use of direct
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析了变速恒频双馈风力发电系统的工作原理。结合风力机特性和双馈发电机特性,说明了变速恒频运行方式下的最优风能捕获策略,并介绍了风力发电系统的滑模变结构控制、自适应控制、鲁棒控制和人工神经网络控制。总结了变速恒频风力发电系统的发展趋势。-Analysis of a Variable Speed Constant Frequency Wind Power Generation System works. Combination of wind turbine characteristics and t
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:针对3-业过程控制中传统PID控制器的不足,介绍了模糊PID控制器的设计方法,将模糊PID
算法应用于汽轮机功频电液调节系统中,并将模糊PID算法与传统PID算法进行了比较-: For 3- business process control, the lack of traditional PID controller, introduced the fuzzy PID controller design method, the fuzzy PID algorithm used in st
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AN ADAPTIVE CONTROLLER FOR POWER SYSTEM
LOAD-FREQUENCY CONTROL -AN ADAPTIVE CONTROLLER FOR POWER SYSTEM
LOAD-FREQUENCY CONTROL
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The main frequency is an important parameter of
an electrical power system. The frequency can change over a
small range due to generation-load mismatches. Some power
system protection and control applications
The paper presents a
new method
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本系统是以FPGA(EP2C8Q240C8)为控制核心,由压控振荡器、PLL倍频器、高频功率放大器、遥控器及LCD显示模块组成的压控LC振荡器。能实现输出正弦波频率在15MHZ~35MHZ步进可调,其最小步进为5002HZ,频率稳定度为10-5。当输出信号的频率为30MHZ、峰峰值稳定在1V左右时,在+12V单电源工作的情况下,功率放大器能实现在50Ω纯阻性和50Ω+20pf容性负载上输出功率大于20mw。LCD显示模块能实时显示输出信号的峰峰值和频率,精度由于10 。-This system
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变速恒频风力发电系统的
自抗扰控制技术
-Variable speed constant frequency wind power system disturbance rejection control technology
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变速恒频风力发电系统的
自抗扰控制技术
-Variable speed constant frequency wind power system disturbance rejection control technology
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三相异步电动机变频器调速系统,它通过变频器,将频率固定的交流电变换成频率连续可调交流电源。本文为基于Matlab的异步电动机变频调速系统的仿真研究。-Three-phase asynchronous motor inverter speed control system, through the inverter, the fixed-frequency alternating current is converted into frequency AC power continuously a
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大规模互联电网低频振荡分析与控制方法综述-Large interconnected power system analysis and control of low frequency oscillation Methods
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This paper proposes the design and implementation of the functional electrical stimulator using the ultra low power microcontroller MSP430 , which restores the functionality of paralyzed portion of human body due to spinal cord injury (SCI) that cons
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随着异步电机开始在交流调速领域占统治地位,针对高性能异步电机的调速系统
研究得到广泛关注。特别是 20 世纪 80 年代直接转矩控制(DTC)的出现,以其简洁高
效的控制方式,进一步提高异步电机的性能。但传统 DTC 存在转矩和磁链滞环宽度使
得稳态时也会产生转矩脉动。因此高性能控制需要窄的滞环宽度,相应要求高逆变器开
关频率。大功率场合下必须低开关损耗和良好转矩控制性能,传统 DTC 难以同时满足
需求。
-With the beginning of the AC in
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Improved Particle Swarm Optimization Based
Load Frequency Control In
A Single Area Power System
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此 次 变 频 电 源 采 用 数 字 方 式 控 制 , 电 源 系 统 设 计 包 括 主 电 路 、 控 制 电 路 和&
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This study presents an application of a fuzzy gain scheduled proportional and integral (FGPI) controller for load-frequency control of a
two-area electrical interconnected power system. Model simulations of the power system show that the proposed F
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Optimal Fuzzy Logic-based Adaptive Controller
equipped with DFIG Wind Turbine for Frequency
Control in Stand Alone Power System-Optimal Fuzzy Logic-based Adaptive Controller
equipped with DFIG Wind Turbine for Frequency
Control in Stand Alo
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Controller parameters tuning of differential evolution algorithm
and its application to load frequency control of multi-source power
system
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Predictive direct power control (P-DPC) applied
to voltage source pulse-width-modulation (PWM) rectifier was
introduced in this paper. Based on the model of power
prediction, voltage vectors were selected according to
minimizing power errors
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Microgrids are eco-friendly power systems because they use renewable sources
such as solar and wind power as the main power source. However, the stochastic nature of
wind and solar power is a considerable challenge for the efficient operation of
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