搶答器是一種智力競賽常用的器件,搶答器的設(shè)計方法千差萬別,文章利用常用的數(shù)字電子器件,設(shè)計了八路搶答器電路的設(shè)計、仿真及實現(xiàn)的全過程,提出兩種可行的設(shè)計方案:方案1采用74ls373實現(xiàn)電路鎖存,74ls148實現(xiàn)電路編碼,74ls74及數(shù)碼管實現(xiàn)電路顯示;方案二采用CD4511BCN和LMC555CM集成電路及數(shù)碼管實現(xiàn)搶答器的控制和顯示。本文設(shè)計用的器件簡單,容易理解,適用于初學(xué)電子技術(shù)的人員。Answer scrambler is a common device in intelligence competition, and its design methods vary greatly. This paper designs the whole process of design, simulation and Realization of the circuit of eight-way answer scrambler by using common digital electronic devices, and puts forward two feasible design schemes: scheme 1 uses 74 ls373 to realize circuit latching, 74 ls148 to realize circuit coding,74 ls74 and digital tube to realize circuit. The second scheme uses CD4511 BCN, LMC555 CM integrated circuit and digital tube to control and display the answerer. The device designed in this paper is simple and easy to understand, and it is suitable for the beginners of electronic technology.
標(biāo)簽： 搶答器
上傳時間： 2022-04-05
上傳用戶：
針對目前MSP430單片機實驗裝置較少、實驗內(nèi)容少,而且無MSP430高端產(chǎn)品的實驗裝置,研制了基于MSP430F5529單片機的綜合實驗裝置,主要包括MSP430 Launch Pad和母板兩部分。較傳統(tǒng)的單片機實驗裝置增加了模擬電路的設(shè)置,設(shè)計的實驗?zāi)軌蚶脝纹瑱C的所有外設(shè),可進行模塊基礎(chǔ)實驗和綜合實驗兩大類實驗,非常適合自動化和電氣信息類大學(xué)生學(xué)習(xí)使用。Concerning with the lack of experimental equipment and content based on MSP430,and especially,the experimental equipment of MSP430 senior products,an experimental equipment based on MSP430F5529 microcontroller is developed. It mainly consists of two parts： MSP430 Launch Pad and main board. Compared with traditional microcontroller experiment equipment,a few analog circuits were added. The experiment we set up takes advantage of all microcontroller peripherals. Students can do two kinds of experiments： module experiment and complex experiment.Therefore it fits university students in automation and electrical major very well.
標(biāo)簽： msp430f5529 單片機
上傳時間： 2022-04-13
上傳用戶：
該步進電機驅(qū)動器又稱為EasyDriver，EasyDriver能夠為兩級步進電機提供大約每相750mA（兩極一共1.5A）的驅(qū)動。它默認設(shè)置為8步細分模式（所以如果你的電機是每圈200步，你使用EasyDriver時默認為每圈1600步），更多細分模式可以通過將MS1或MS2兩個接腳接地進行設(shè)置。這是一種基于Allegro A3967驅(qū)動芯片的細分斷路器。對于此設(shè)計的完整規(guī)格，請查閱A3967的參數(shù)表。它的最大每相電流從150mA到750mA。可以采用的最大驅(qū)動電壓大概是30V，其中包括板載5V的調(diào)壓器，所以只需要一個電源。質(zhì)優(yōu)價廉，這玩意兒只要十幾美元，比你自己制作電路板更便宜。步進電機驅(qū)動器設(shè)計特色：· A3967 Microstepping Driver· MS1 and MS2 pins broken out to change microstepping resolution to full, half, quarter and eighth steps (defaults to eighth)· Compatible with 4, 6, and 8 wire stepper motors of any voltage· Adjustable current control from 150mA/phase to 700mA/phase· Power supply range from 6V to 30V. The higher the voltage, the higher the torque at high speeds
標(biāo)簽： 步進電機 驅(qū)動器 pcb 驅(qū)動
上傳時間： 2022-04-27
上傳用戶：
應(yīng)用無跡卡爾曼濾波算法（UKF）進行鋰電池的SOC估計,采用Thevenin二階RC等效電路模型,對HPPC電池脈沖充放電實驗數(shù)據(jù)進行Matlab處理,得到較為準確的模型.通過在Matlab中編寫算法程序,對不同工況的估計值與實際值進行誤差估算及對比分析,通過此算法進行SOC估計,得到該算法可有效降低系統(tǒng)誤差并糾正SOC的初值偏差.The non trace Calman filter （UKF） is applied to the SOC estimation of lithium battery. The Thevenin two order RC equivalent circuit model is used to process the HPPC battery pulse charge discharge experimental data by Matlab processing, and a more accurate model is obtained. By writing algorithm program in Matlab, the error estimation and comparison analysis of the estimated value and actual value of different states are carried out, and the SOC estimation is carried out by this algorithm. The algorithm can effectively reduce the system error and correct the initial value deviation of the SOC.
標(biāo)簽： 卡爾曼濾波
上傳時間： 2022-05-03
上傳用戶：默默
為解決移相全橋電路驅(qū)動及相角控制問題,設(shè)計了一種數(shù)字控制的移相全橋驅(qū)動電路.以TPL521為光耦隔離、IR2110為柵極驅(qū)動芯片.由DSP產(chǎn)生PWM信號,經(jīng)過光耦隔離和邏輯電路后送至IR2110進行相角控制.文章對IR2110驅(qū)動電路原理進行分析及參數(shù)進行設(shè)計,對TMS320F28335進行設(shè)置并給出部分代碼.實驗結(jié)果表明：通過TMS320F28335可產(chǎn)生的不同相角的PWM波形,滿足了移相全橋?qū)Σ煌嘟强刂频囊?In order to solve the problem of phase-shifted full-bridge circuit driving and phase angle control,a digitally controlled phaseshifted full-bridge driving circuit was designed. TPL521 optocoupler isolation,IR2110 gate driver chip. PWM signals are generated by the DSP and sent to the IR2110 for phase angle control after optocoupler isolation and logic circuits. This text carries on the analysis to the principle of IR2110 drive circuit and parameter design,set up and give out some code to TMS320F28335. The experimental results show that the PWM waveforms with different phase angles generated by TMS320F28335 can meet the requirements of phase-shifted full-bridge control for different phase angles.
上傳時間： 2022-05-03
上傳用戶：zhanglei193
Abstract: A sliding mode observer and fractional-order phase-locked loop (FO-PLL) method is proposed for the sensorless speed control of a permanent magnet synchronous motor (PMSM).The saturation function is adopted in order to reduce the chattering phenomenon caused by the sliding mode observer. In this proposed FO-PLL, method, a regulable fractional order r is involved, which means that the FO-PLL provides an extra degree of freedom. In fact, the conventional phase-locked loop (PLL) applied in sensorless PMSM control can be seen as a special case of the proposed FO-PLL. By selecting a proper fractional order r a better performance may be achieved. The computer simulation results demonstrate the effectiveness of the proposed method.Key words: fractional calculus; fractional order phase-locked loop; sensorless control; sliding mode observer; permanent magnet synchronous motor; speed controll
上傳時間： 2022-06-18
上傳用戶：
In this presentation, we will look at what the Serial Peripheral Interface, otherwise known as the SPI, is. and how it is used to communicate data to and from the PICmicro microcontroller.SPl is frequently used when few 1/O lines are available, but communication between two or more devices must be fast and easy to implement.In this presentation, we will discuss the following topics: We will first cover an Overview of SPI This section of the tutorial will introduce you to SPI and its concepts.Next, we will examine the use of SPI on the PICmicro MCU.The details of how SPI is implemented on a PICmicro device will be examined.Then, a Code Walkthrough will be given.The walkthough will explore code for both an SPI Master and SPI Slave. The example will have the Master generate data for sending to the slave.Finally, there will be a few resources given at the end of the presentation. These resources will allow you to explore in more detail the SPI interface
標(biāo)簽： spi協(xié)議
上傳時間： 2022-06-20
上傳用戶：
一.基礎(chǔ)理論鎖相環(huán)路（Phase Locked Loop）是一個閉環(huán)的相位控制系統(tǒng)，它的輸出信號的相位能自動跟蹤輸入信號相位。系統(tǒng)框圖如下：當(dāng)0，（1）與0：（1）相等時，兩矢量以相同的角速度旋轉(zhuǎn)，相對位置，即夾角維持不變，通常數(shù)值又較小，這就是環(huán)路的鎖定狀態(tài)。從輸入信號加到鎖相環(huán)路的輸入端開始，一直到環(huán)路達到鎖定的全過程，稱為捕獲過程。設(shè)系統(tǒng)最初進入同步狀態(tài)[2nrtto，e，.]的時間為1。。那么從1=1，的起始狀態(tài)到達進入同步狀態(tài)的全部過程就稱為鎖相環(huán)路的捕獲過程。捕獲過程所需的時間T，=1，-1，稱為捕獲時間。顯然，捕獲時間T，的大小不但與環(huán)路的參數(shù)有關(guān)，而且與起始狀態(tài)有關(guān)。對一定的環(huán)路來說，是否能通過捕獲而進入同步完全取決于起始頻差8.（4）-Ao。。若Ao，超過某一范圍，環(huán)路就不能捕獲了。這個范圍的大小是鎖相環(huán)路的一個重要性能指標(biāo)，稱為環(huán)路的捕獲帶Ao，。
標(biāo)簽： 射頻鎖相環(huán)
上傳時間： 2022-06-21
上傳用戶：
·Overview:20 minutes-Introduction and Objectives-Motor Control Development Toolbox:Library blocks,FreeMASTER, and Bootloader·Hands-On Demo:50 minutes-Motor Kit(Describe Freescale 3-Phase Motor Kit)-Convert simple model to run on Motor Kit with MCD Toolbox and use FreeMASTER·Model Based Design:10 minutes-Model Based Design Steps:Simulation,SIL,PIL and ISO 26262-SIL/PIL Hands-On Demo Step 2& 3 of MBD·Motor Control:20 minutes-FOC Sensor-less control and how to use it to turn a motor·Motor Control Hands-On Demo:80 minutes-Implement FOC Sensor-less Motor Control on Motor Kit-Run software from the model and use FreeMASTER to monitor·Summary and Q&A:10 minutes
標(biāo)簽： matlab 數(shù)學(xué)函數(shù)庫
上傳時間： 2022-06-24
上傳用戶：
摘要：介紹了以FreeModbus協(xié)議找在嵌入式搶占實時操作系統(tǒng)μC/OS-l的STM32平臺上，成功實現(xiàn)了Modbus協(xié)議的移植。通過詳細分析FreeModbus協(xié)議花并編寫STM32F103VET6微處理器的底層驅(qū)動，成功實現(xiàn)了工業(yè)Modbus協(xié)議RTU和ASCll兩種模式的通信功能。測試結(jié)果表明，在實際工業(yè)生產(chǎn)控制和儀表開發(fā)中，應(yīng)用Freemodbus協(xié)議，完全符合工業(yè)數(shù)據(jù)采集、實時控制和數(shù)據(jù)處理等廠級重復(fù)性和精確度要求，在一定程度上降低了工業(yè)儀表開發(fā)的周期及成本。關(guān)鍵詞：實時操作系統(tǒng)，uC/OS-ll，F(xiàn)reeModbus，Modbus協(xié)議，STM32Abstract:This paper introduces FreeModbus stack transplanted to the STM32 platform which has been embedded in the preemptive real-time operating system uC/OS-ll，in order that the transplantation of the Modbus protocol is successfuly im-plemented.The FreeModbus stack is analyzed in detail and STM32F103VET6 microprocessor underlying driver is writed，so that the two Modbus industrial communication function RTU and ASCll are successfully realized.Keywords:time operating system，uC/OS-ll，.FreeModbus，Modbus協(xié)議，STM32
標(biāo)簽： freemodbus 通信協(xié)議
上傳時間： 2022-06-25
上傳用戶：
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