flow error control techniques

Ngày tải lên: 21/06/2014, 23:20

... Pearson Addison-Wesley Flow Of Control  Flow of control refers to the order in which program statements are performed  We have seen the following ways to specify flow of control  if-else-statements  while-statements  do-while-statements  New ... WEST}; Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Chapter 3 More Flow of Control Slide 3- 26 Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley indented Display ... Addison-Wesley Using Short-Circuit Evaluation  Short-circuit evaluation can be used to prevent run time errors  Consider this if-statement if ((kids != 0) && (pieces / kids >= 2) ) cout...

Ngày tải lên: 12/09/2012, 22:47

Ngày tải lên: 05/09/2013, 10:15

... torque control 113 3 D.C. motor drive control 114 Flux controller 114 Torque controller 115 Performance and applications 116 4 Analysis of and set up of a speed controller 116 Ideal speed controller ... terms 101 4 Drive control 103 1 General 103 The ideal control system 103 Open-loop control 103 Closed-loop control 104 Criteria for assessing the performance of a closed-loop control system 104 2 ... 194 Data model 194 Media access control 194 Error handling 195 Conclusions 195 Application layer 195 Device profile 195 3 Simple fieldbus systems 196 Modbus 196 Control Techniques& apos; protocol 196 4...

Ngày tải lên: 20/10/2013, 02:15

... this scope. In addition, we presented the main solutions for error control in unicast environments. We presented important error control techniques operating at the DLL, since all transport protocols that ... or duplicated segments. Error control in TCP is achieved by using a version of the Automatic Repeat reQuest (ARQ) error control protocols operating at DLL and it involves both error detection and retransmission ... delivered data is in order, without error and without any segment lost or duplicated. Reliability in TCP is obtained by using error control mechanisms, which may include techniques for detecting corrupted,...

Ngày tải lên: 26/10/2013, 17:15

... (PLL) control or by a feedforward action operating on the control thresholds [29]–[31]. Fig. 3 shows the sim- plified scheme of the implementation of such a controller. As can be seen, the controller ... current i S spectrum. niques for active filter applications. All the techniques, hys- teresis control, deadbeat control, and linear rotating frame control were considered, including the latest improvements brought ... in the control techniques result in rather satisfactory performance levels for all three controllers. How- ever, the results of the comparison show a certain superiority of the hysteresis control. ...

Ngày tải lên: 03/01/2014, 19:45

... Block scheme of FL controller, (b) control surface of con- ventional PI controller, (c) control surface of FL controller; comparison of current-tracking performance with PI and FL controller: (d) ... those of bang-bang controllers. C. State Feedback Controller The conventional PI compensators in the current error com- pensation part can be replaced by a state feedback controller working in ... are the FL controller input crisp values. The reference voltage for the PWM modulator are the FL-CC crisp output commands When an FL controller is used as a current controller, the tracking error...

Ngày tải lên: 03/01/2014, 19:45

... Addison- Wesley. All rights reserved. 2-24 switch Pitfalls/Tip ♦ Forgetting the break; ♦ No compiler error ♦ Execution simply "falls thru" other cases until break; ♦ Biggest use: MENUs ♦ Provides...

Ngày tải lên: 19/03/2014, 00:20

Ngày tải lên: 24/03/2014, 20:22

... xiii ISECTION ESSENTIALS OF CONTROL TECHNIQUES WHAT YOU NEED TO KNOW 1 Introduction: Control in a Nutshell; History, Theory, Art, and Practice 3 1.1 e Origins of Control 3 1.2 Early Days of ... J. (John) Essentials of control techniques and theory / John Billingsley. p. cm. Includes index. ISBN 978-1-4200-9123-6 (hardcover : alk. paper) 1. Automatic control. 2. Control theory. I. Title. TJ223.M53B544 ... 10/12/09 1:40:45 PM Essentials of Control Techniques and Theory 91239.indb 1 10/12/09 1:40:29 PM This page intentionally left blank 6 ◾ Essentials of Control Techniques and Theory a small sinusoidal...

Ngày tải lên: 21/06/2014, 07:20

... 10/12/09 1:42:34 PM 78 ◾ Essentials of Control Techniques and Theory 7.2 Sine-Wave Fundamentals Sine-waves and allied signals are the tools of the trade of classical control. ey can be represented ... in control will always be obliged to cover these aspects, although many engineering design tasks will benefit from a broader view. 91239.indb 77 10/12/09 1:42:21 PM 70 ◾ Essentials of Control Techniques ... powerful tool for the design of high performance position control systems. e motor drive might be pro- portional to the position error for small errors, but to achieve accuracy the drive must approach...

Ngày tải lên: 21/06/2014, 07:20

... feedback coefficients must be positive. Since position control on its own would require large negative values, a controller based on position control of the trolley is going in entirely the wrong ... Discrete Time Systems and Computer Control 8.1 Introduction ere is a belief that discrete time control is somehow more difficult to understand than continuous control. It is true that a complicated ... first let us look at discrete time control in general. When dedicated to a real-time control task, a computer measures a number of system variables, computes a control action, and applies a corrective...

Ngày tải lên: 21/06/2014, 07:20

... salt. 91239.indb 129 10/12/09 1:43:51 PM II ESSENTIALS OF CONTROL THEORY— WHAT YOU OUGHT TO KNOW 91239.indb 131 10/12/09 1:43:51 PM 142 ◾ Essentials of Control Techniques and Theory Integrating by parts, ... to u=c*(x-command)+d*vest+e*tiltsens+f*trate; 91239.indb 125 10/12/09 1:43:49 PM 128 ◾ Essentials of Control Techniques and Theory rear wheel perpendicular to the line, while the “tilt” equations for falling ... definitions var vlim=.5; var vdem=0; 91239.indb 128 10/12/09 1:43:50 PM 122 ◾ Essentials of Control Techniques and Theory <div id="trolley" style="position: absolute; left: 400;...

Ngày tải lên: 21/06/2014, 07:20

... k + – 1 s(s+1) Output position Position demand Error Figure 12.1 Position control with variable feedback. 91239.indb 166 10/12/09 1:44:49 PM 148 ◾ Essentials of Control Techniques and Theory favorite. Soon ... www. esscont.com/11/ladderfreq.htm and www.esscont.com/11/ladder.htm) 91239.indb 155 10/12/09 1:44:33 PM 156 ◾ Essentials of Control Techniques and Theory implying from the theory of complex functions that s leaves the corresponding ... frequency plane “return semicircle” added. 91239.indb 161 10/12/09 1:44:44 PM 170 ◾ Essentials of Control Techniques and Theory var ds=.04; var segmid=[0,0]; var dgain=[0,0]; var oldgain=[0,0]; var...

Ngày tải lên: 21/06/2014, 07:20

... Figure 16.7: 1. Controllable and observable 2. Controllable but not observable Controllable and observable Controllable but not observable Observable but not controllable Neither controllable nor ... of Control Techniques and Theory 3. Observable but not controllable 4. Neither controllable not observable Clearly any system model built to represent a transfer function must be both controllable ... en there is no way in which those variables can be controlled. Such variables are “uncontrollable.” If the poles associated with all the uncontrollable variables are stable, then the system...

Ngày tải lên: 21/06/2014, 07:20

... 10/12/09 1:46:54 PM 244 ◾ Essentials of Control Techniques and Theory and added a controller with state z, where  zKzLyMv=++ We apply signals from the controller dynamics, the command input ... BAB [] = −       01 12 which has rank 2. e system is controllable. Q 16.6.2 Is this system also controllable?  xx= −−       + −       01 12 1 1 u Q 16.6.3 Is this third system controllable?  xx= −−       +       01 12 1 0 u Q ... settling—the sort of system that does not really need feedback control! 91239.indb 233 10/12/09 1:46:33 PM 230 ◾ Essentials of Control Techniques and Theory Now AB = −−             = −       01 12 0 1 1 2 so ...

Ngày tải lên: 21/06/2014, 07:20

... PM 276 ◾ Essentials of Control Techniques and Theory w z z = − + 21 1τ from which z w w = + − 2 2 τ τ and finally the z-plane poles and zeros of the controller enable the controller code to ... quantization errors. If a controller outputs a position demand to an analog position control subsystem, the command might require a great number of levels to define the target 0 1 Figure 20.2 Control ... continuous control, discrete time control opens up some extra possibilities. In Section 8.8, we considered a motor system. With feedback, the sequence of values of the position error died away...

Ngày tải lên: 21/06/2014, 07:20

... encoding a control lever. is error is outside the loop and therefore nothing can be done about it. e target will be the signal as interpreted by the control electronics. N2: An error in measuring ... ultimate value of the error. V(s) Y(s) G(s) H(s) U(s) F(s) – N(s) Figure 21.2 Control loop with disturbance noise. 91239.indb 291 10/12/09 1:48:22 PM 308 ◾ Essentials of Control Techniques and Theory 22.5 ... single integration. Integral control is a method open to a simple analog controller. When the con- troller is digital, many more sophisticated techniques are available. e controller can be “aware”...

Ngày tải lên: 21/06/2014, 07:20

Ngày tải lên: 21/06/2014, 07:20

Ngày tải lên: 21/06/2014, 13:20