barcode reader project in c#.net LINEAR in Software

Creator Code 128C in Software LINEAR

LINEAR
Code 128 Code Set C Scanner In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
Making Code 128A In None
Using Barcode printer for Software Control to generate, create Code128 image in Software applications.
cLosm-LooP SYSTEMS
Code 128 Code Set B Scanner In None
Using Barcode reader for Software Control to read, scan read, scan image in Software applications.
Painting USS Code 128 In Visual C#.NET
Using Barcode drawer for VS .NET Control to generate, create Code 128 Code Set A image in Visual Studio .NET applications.
Proportional Control for Load Change (Regulator Problem)
Code-128 Generator In .NET
Using Barcode generation for ASP.NET Control to generate, create Code 128A image in ASP.NET applications.
Generating ANSI/AIM Code 128 In VS .NET
Using Barcode generation for Visual Studio .NET Control to generate, create Code 128 Code Set A image in .NET framework applications.
The same control system shown in Fig. 13.k is to be considered. This time the set point remains fixed; that is, Ti = 0. We am interested in the response of the system to a change in the inlet stream temperature, i.e., to a load change. Using the methods of Chap. 12, the overall transfer function becomes 1 _ = AA- /(TS + 1) T 1 + K,A/(m + 1) = TS + 1 + KJ Ti This may be arranged in the form of the first-order lag; thus T A2 -=Ti where A2 = 1 1 + K,A 71s + 1 (13.6) (13.5)
USS Code 128 Generation In VB.NET
Using Barcode drawer for .NET Control to generate, create Code128 image in .NET framework applications.
Code39 Generation In None
Using Barcode printer for Software Control to generate, create Code 39 Full ASCII image in Software applications.
l = 1 + K,A As for the case of set-point change, we have an overall response that is first-order. The overall time constant ri is the same as for set-point changes. The response of the system to a unit-step change in inlet temperature Ti is shown in Fig. 13.3. It may be seen that T approaches l/( 1 + K,A). To demonstrate the benefit of control, we have shown the response of the tank temperature (open-loop response) to a unit-step change in inlet temperature if no control were present; that is, K, = 0. In this case, the major advantage of control is in reduction of offset. From E5q. (13.3), the offset becomes Offset = T;(m) - T (m) = 0 - 1 + K A c 1 =1 + K,A
Create Code 128A In None
Using Barcode encoder for Software Control to generate, create Code 128 Code Set B image in Software applications.
Data Matrix 2d Barcode Creation In None
Using Barcode printer for Software Control to generate, create Data Matrix 2d barcode image in Software applications.
(13.7)
Barcode Creator In None
Using Barcode generator for Software Control to generate, create bar code image in Software applications.
Printing UPC-A Supplement 5 In None
Using Barcode generation for Software Control to generate, create UPC-A Supplement 5 image in Software applications.
As for the case of a step change in set point, the offset is reduced as controller gain K, is increased.
USPS Confirm Service Barcode Encoder In None
Using Barcode generation for Software Control to generate, create Planet image in Software applications.
Print Code128 In VS .NET
Using Barcode generator for ASP.NET Control to generate, create Code 128B image in ASP.NET applications.
Without control
Print Code 128B In Visual Basic .NET
Using Barcode drawer for Visual Studio .NET Control to generate, create Code 128A image in VS .NET applications.
UCC-128 Generation In None
Using Barcode encoder for Excel Control to generate, create EAN / UCC - 13 image in Microsoft Excel applications.
{With control
Code 128A Encoder In None
Using Barcode generator for Online Control to generate, create Code 128 Code Set B image in Online applications.
Printing Bar Code In Objective-C
Using Barcode drawer for iPhone Control to generate, create bar code image in iPhone applications.
(K,A=2)
Creating Bar Code In .NET Framework
Using Barcode printer for .NET framework Control to generate, create bar code image in .NET framework applications.
Recognize GS1 - 13 In Visual Studio .NET
Using Barcode decoder for .NET Control to read, scan read, scan image in Visual Studio .NET applications.
FIGURE 13-3 Unit-step response for load change (P control).
TRANSIENT RESPONSE OF SIMPLE CONTROL SYSTEMS
Proportional-Integral Control for Load Change
In this case, we replace G, in Fig. 13.le by K,(l + l/rls). The overall transfer function for load change is therefore T AK I(TS + 1) -= 1 + [K,AI(7s + l)](l + l/~~s) Ti Rearranging this gives T 71 s -= Ti (7s + l)(r,s) + K,A(qs + 1) or T TI s -= Ti rrIs2 + (KcAq + q)s + K,A Since the denominator contains a quadratic expression, the transfer function may be written in the standard form of the transportation lag to give T (~IKA)s -= Ti (q/KcA)s2 + ~~(1 + l/K,A)s + 1 or T AlS -= TfS + 2cqs + 1 Ti 71 where Al=Kc.4 (13.9) (13.8)
For a unit-step change in load, T/ = l/s. Combining this with Eq. (13.9) gives ti T = Al TfS2 + 2lqs + 1 (13.10)
Equation (13.10) shows that the response of the tank temperature is equivalent to the response of a second-order system to an impulse function of magnitude A 1. Since we have studied the impulse response of a second-order system in Chap. 8, the solution to the present problem is already known. This justifies in part uur previous work on transients. Using Eq. (8.3 l), the impulse response for this system may be written for 5 < 1 as
T = Al
e-It 1 sin
(13.11)
L~EAR~~~ED-L~~P~Y~TEM~
0.2 -
FIGURE 13-4 Unit-step response for load change (PI control).
Although the response of the system can be determined from JZq. (13.11) or Fig. 8.5, the effect of varying K, and 71 on the system response can beseen mote clearly by plotting response curves, such as those shown in Fig. 13.4. From Fig. 13.4a, we see that an increase in K,, for a fixed value of 71, improves the response by decreasing the maximum deviation and by making the response less oscillatory. The formula for 4 in E$, (13.9) shows that 5 increases with K,, which indicates that the response is less oscillatory. Figure 13.4b shows that, for a fixed value of K,, a decrease in r1 decreases the maximum deviation and period. However, a decrease in ~1 causes the response to become more oscillatory, which means that 6 decreases. This effect of ~1 on the oscillatory nature of the response is also given by the formula for 5 in Eq. (13.9). For this case, the offset as defined by Eq. (13.3) is zero; thus Offset = T;(m) - T (m) =(-J-o=0 One of the most important advantages of PI control is the elimination of offset.
Copyright © OnBarcode.com . All rights reserved.