Tài liệu Mechatronics DC Motor / Tachometer Closed-Loop Speed Control System ppt

... Craig DC Motor / Tachometer Closed-Loop Speed Control System 28 Mechatronics Kevin Craig DC Motor / Tachometer Closed-Loop Speed Control System 29 9. Testing of the Closed-Loop System ... ωωiBJKJKLRLiLVtbinLNMOQP=−−−LNMMOQPPLNMOQP+LNMOQP01 Mechatronics Kevin Craig DC Motor / Tachometer Closed-Loop Speed Control System 19 Mechatronics DC Motor / Tachometer Closed-Loop Speed Control System 1. Introduction ... made for the DC motor model, as the analog tachometer is a DC generator - a DC motor in reverse. Mechatronics Kevin Craig DC Motor / Tachometer Closed-Loop Speed Control System 16 4. Mathematical...

... drawback to SWDC motors is that they do nothave precise speed control like PMDC and SHWDCmotors have.FIGURE 4: SERIES-WOUND DC MOTORSArmatureBrushPermanentMagnet Poles DC VoltageSupplyArmatureBrushShuntField DC VoltageSupplyArmatureBrushSeriesField DC VoltageSupply ... and series-wound motors. As shown inFigure 5, CWDC motors employ both a series and ashunt field. The performance of a CWDC motor is acombination of SWDC and SHWDC motors. CWDCmotors have higher ... driving BDC motors.REFERENCESAN893 Low-Cost Bidirectional Brushed DC Motor Control Using the PIC16F684.AN847 RC Model Aircraft Motor Control. www.howstuffworks.comwww.engin.umich.edu/labs/csdl/me350/motors /dc/ index.htmlNote:...

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... Configuration -> Administrative Templates -> Control Panel.2. Chọn “Show only specified Control Panel Applets” hay “Hides specified Control Panel Applets”. ở cửa sổ bên phải. Right Click ... bạn chọn “Show only specified Control Panel Applets” ở bước 2, hay giấu, nếu bạn chọn “Hides specified Control Panel Applets” ở bước 2, như sau:o “sysdm.cpl” cho System Propertieso “ncpa.cpl” ... Giấu một số biểu tượng trong Control Panel Nếu bạn muốn giấu một số biểu tượng khi mở Control Panel, bạn làm như sau:1. Chạy gpedit.msc từ Start - Run....

... 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 7/6 6EVAQiGaeWwlbX9tq7Attt2/YXgblUDdgSsOX5m2cOcpjp2dJvWjGFaIg30L6oKUsM= ... (&rhint, sizeof (struct rrinfo));res_init();_res.options |= RES_USEVC; // use TCP // _res.options |= RES_STAYOPEN; // do not use! apples and orangesh = gethostbyname(argv[2]);91APPENDIX C. ... local tcp ports.** Example:** ./bench ldap 172.16.13.119 "cn=User 5, dc= josefsson, dc= org" 5000* ./bench dns 172.16.13.119 user5.josefsson.org 5000 */ 89APPENDIX C. BENCHMARKING TOOL#include...

... CASE STUDYWashington DC Law Firm Enables Wireless CoverageCHALLENGEKirkpatrick & Lockhart Preston Gates Ellis LLP...

... time.initial height =1 msurface area = 2 m2Ki = 1 liter/min/degreeKo = 2 liter/min/mvalve angle = 20 degreesT = 30 sec.page 455.1.3 Second Order System Example• Consider the second order example ... 485.2 DISCRETE CONTROLLERS• The system models we developed before allow us to predict how a system will behave. A sepa-rate, and important topic is computer control. • With no controller we ... right speed. • A controller looks at the desired system condition, and the actual system condition, and then adjusts the input to bring the desired and actual closer. For example cruise control. •...

... 0x330, /* Base address for card */ r, c_now, /* Set up variables for equations */ e_now, e_last=0, /* error values */ m_now, m_last=0; /* control values */ double T = 0.1; /* set the system time ... process */ sleep(T); /* an operating system specific timing function */ c_now = inp(base+0 )/1 6 + inp(base+1)*16; /* calculate the current value */ e_now = r - c_now; /* calculate current error */ m_now ... e_last; /* the control equation */ if (m_now < 0) m_now = 0; /* keep the output in 0-4095 range */ if (m_now > 4095) m_now = 4095;outp(base+4, m_now & 255); /* output 8 LSB */ outp(base+5,...

... common systems assumed - first and second order.• First order systems are very simple, as is shown below.7.1.6 A Motor Control System Example• Condsider the example of a DC servo motor controlled ... and changing spring constant, etc.3.2 CONTROL SYSTEM CHARACTERISTICS• Control systems are present in most systems we see. Example - elevator height.• Some systems are naturally unstable and tend ... first order system) . As damping factorapproaches 0, the first peak becomes infinite in height.page 107troller is to position the motor. The system below shows a reasonable control system arrange-ment....

... 19AN887 CONTROL TECHNIQUESVarious speed control techniques implemented bymodern-age VFD are mainly classified in the followingthree categories:• Scalar Control (V/f Control) • Vector Control ... 20% in the operating speed of the motor from its rated speed will result in an almost 50%reduction in the input power to the motor. This is notpossible in a system where the motor is directlyconnected ... Speed %100010031212212121212;=== Speed SpeedPowerPowerand Speed SpeedHeadHead Speed SpeedFlowFlowNote: Subscripts (1) and (2) signify two different operating...