barcode reader using c#.net 1 (8s + 1y 1 in Software

Paint Code 128B in Software 1 (8s + 1y 1

1 1 (8s + 1y 1
Recognizing Code 128 Code Set B In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
Generate Code 128C In None
Using Barcode creator for Software Control to generate, create Code-128 image in Software applications.
FlGURE P17-9
Read Code-128 In None
Using Barcode recognizer for Software Control to read, scan read, scan image in Software applications.
Code 128B Creation In C#
Using Barcode creator for .NET framework Control to generate, create Code 128C image in .NET applications.
17.10. (a) For the system shown in Fig. P17.10 determine the value of K, that will give 30 of phase margin. (b) If a PI controller with rl = 2 is used in place of the proportional controller, determine the value of Kc for 30 of phase margin.
Creating USS Code 128 In .NET Framework
Using Barcode encoder for ASP.NET Control to generate, create Code 128C image in ASP.NET applications.
Encoding Code 128 In Visual Studio .NET
Using Barcode generator for VS .NET Control to generate, create Code 128C image in .NET applications.
CONTROL
Code 128A Printer In VB.NET
Using Barcode printer for VS .NET Control to generate, create Code-128 image in .NET applications.
Code 128 Code Set B Encoder In None
Using Barcode creation for Software Control to generate, create ANSI/AIM Code 128 image in Software applications.
SYSTEM DESIGN BY FREQUENCY RESPONSE
EAN128 Creator In None
Using Barcode creator for Software Control to generate, create EAN 128 image in Software applications.
Code-39 Generation In None
Using Barcode encoder for Software Control to generate, create ANSI/AIM Code 39 image in Software applications.
Controller
ECC200 Printer In None
Using Barcode drawer for Software Control to generate, create Data Matrix ECC200 image in Software applications.
Print EAN-13 Supplement 5 In None
Using Barcode creation for Software Control to generate, create EAN13 image in Software applications.
FIGURE P17-11 17.11. A stirred-tank heating process and its block diagram are shown in Fig. P17.11. The
Postnet Generation In None
Using Barcode creator for Software Control to generate, create Delivery Point Barcode (DPBC) image in Software applications.
Code 128A Generation In None
Using Barcode generator for Microsoft Word Control to generate, create ANSI/AIM Code 128 image in Word applications.
control system is tuned by the Ziegler-Nichols method, and the ultimate frequency, wu is 2 radlmin. (a) Determine the value of K, by the Ziegler-Nichols method of tuning. (b) What is the length of the pipe between the tank and the measuring element (c) What are the gain margin and the phase margin for the control system when K, is set to the Ziegler-Nichols value found in part (a). Data on process: p, density of fluid = 62 IbEt C, heat capacity of fluid = 1.0 Btu/(lb)( F) inside diameter of pipe = 2.0 in.
Painting Data Matrix 2d Barcode In Java
Using Barcode generator for Java Control to generate, create Data Matrix image in Java applications.
Decoding Barcode In Visual C#.NET
Using Barcode Control SDK for VS .NET Control to generate, create, read, scan barcode image in VS .NET applications.
P A R T
Decode EAN / UCC - 14 In Visual C#
Using Barcode reader for VS .NET Control to read, scan read, scan image in Visual Studio .NET applications.
Data Matrix ECC200 Generator In Java
Using Barcode printer for Java Control to generate, create DataMatrix image in Java applications.
PROCESS APPLICATIONS
Barcode Generation In Java
Using Barcode maker for Eclipse BIRT Control to generate, create bar code image in BIRT applications.
GS1 DataBar Expanded Generation In Visual Studio .NET
Using Barcode drawer for .NET framework Control to generate, create DataBar image in .NET applications.
CHAPTER
ADVANCED CONTROL STRATEGIES
Up to this point, the control systems considered have been single-loop systems involving one controller and one measuring element. In this chapter, several multiloop systems will be described; these include cascade control, feedforward control, ratio control, Smith predictor control, and internal model control. The first three have found wide acceptance in industry. Smith predictor control has been known for about thirty years, but it was considered impractical until the modem microprocessor-based controllers provided the simulation of transport lag. Internal model control, which is new and is based on a rigorous mathematical foundation and an accurate model of the process, has been the subject of intense research for the past ten years. The controller hardware and instrumentation for all of these systems are readily available from manufacturers. Since this chapter is quite long, the reader may wish to select the type of advanced control strategy that .is of particular interest. The descriptions of the five strategies are independent and need not be read in the order presented.
CASCADE CONTROL
To provide motivation for the study of cascade control, consider the single-loop control of a jacketed kettle as shown in Fig. 18. la. The system consists of a kettle through which water, entering at temperature Ti, is heated to To by the flow of hot oil through a jacket surrounding the kettle. The temperature of the water in the kettle is measured and transmitted to the controller, which in turn adjusts the flow of hot oil through the jacket. This control system is satisfactory for controlling the kettle temperature; however, if the temperature of the oil-supply should drop, the kettle temperature can undergo a large prolonged excursion from the set point before control is again established. The reason for this is that the controller does not take corrective action until the effect of the drop in oil-supply temperature
PROCESS APPLICATIONS
water
hot o i l
FIGURE 18-1 (a) Single-loop
control of a jacketed kettle (b) cascade control of a jacketed kettle.
has worked itself through the system of several resistances to teach the measuring element. To prevent the sluggish response of kettle temperature to a disturbance in oil-supply temperature, the control system shown in Fig. 18. lb is proposed. In this system, which includes two controllers and two measuring elements, the output of the primary controller is used to adjust the set point of a secondary controller, which is used to control the jacket temperature. Under these conditions, the primary controller adjusts indirectly the jacket temperature. If the oil temperature should drop, the secondary control loop will act quickly to maintain the jacket temperature close to the value determined by the set point that is adjusted by the
ADVANCED
CONTROL
STRATEGIES
FIGURE 18-2 Block diagram: (a) single-loop conventional control (b) cascade control.
primary controller. This system shown in Fig. 18. lb is called a cascade control system. The primary controller is also referred to as the master controller and the secondary controller is referred to as the slave controller. A simplified block diagram of the single-loop system is shown in Fig. 18.20. Figure 18.2b, which is a block diagram representation of the cascade control system, shows clearly that an inner loop has been added to the conventional control system.
Copyright © OnBarcode.com . All rights reserved.