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barcode reader project in c#.net LINEAR in Software
LINEAR Recognize Code128 In None Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications. Drawing Code 128B In None Using Barcode drawer for Software Control to generate, create Code128 image in Software applications. OPENLOOP SYSTEMS
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Draw ISSN  13 In None Using Barcode printer for Software Control to generate, create ISSN  10 image in Software applications. Code 128B Scanner In Visual Studio .NET Using Barcode recognizer for Visual Studio .NET Control to read, scan read, scan image in VS .NET applications. = 10[1  ewl)] EAN 13 Decoder In C#.NET Using Barcode decoder for Visual Studio .NET Control to read, scan read, scan image in VS .NET applications. Bar Code Decoder In Visual C#.NET Using Barcode reader for VS .NET Control to read, scan read, scan image in VS .NET applications. The complete solution to this problem, which is the inverse of Eq. (6.13), is H(f) = lO(1  e ) H(f) = lo((1  e )  [l  e( O.l)]} Simplifying the expression for H(t) for t > 0.1 gives H(r) = l.O52e t >O.l t co.1 t >O.l (6.14) EAN13 Creation In Visual Studio .NET Using Barcode generator for Reporting Service Control to generate, create European Article Number 13 image in Reporting Service applications. EAN / UCC  14 Generation In Visual C#.NET Using Barcode printer for Visual Studio .NET Control to generate, create GS1128 image in VS .NET applications. From Eq. (5.16), the response of the system to an impulse of magnitude 9 is given by H(t)(hpd, = (9)$e = eer In Fig. 6.2, the pulse response of the liquidlevel system and the ideal impulse response are shown for comparison. Notice that the level rises very rapidly during the 0.1 min that additional flow is entering the tar& the level then decays exponentially and follows very closely the ideal impulse response. Painting Code39 In ObjectiveC Using Barcode generator for iPad Control to generate, create Code 3 of 9 image in iPad applications. Code 39 Extended Drawer In ObjectiveC Using Barcode creator for iPhone Control to generate, create Code 39 Full ASCII image in iPhone applications. The responses to step and sinusoidal forcing functions are the same for the liquidlevel system as for the mercury thermometer of Chap. 5. Hence, they need 0 0.1 0.2 (b) FIGURE 62 Approximation of an impulse function in a liquidlevel system. (Example 6l) (n) pulse input; (b) response of tank level. PHYSICAL EXAMPLES OF FIRSTORDER SYSTEMS
not be rederived. This is the advantage of characterizing all firstorder systems by the same transfer function. LiquidLeml Process with Constantflow Outlet An example of a transfer function that often arises in control systems may be developed by considering the liquidlevel system shown in Fig. 6.3. The resistance shown in Fig. 6.1 is replaced by a constantflow pump. The same assumptions of constant crosssectional ama and constant density that were used before also apply here. For this system, Eq. (6.2) still applies, but q(t) is now a constant; thus q(t)  qo = A% At steady state, Eq. (6.15) becomes (6.16) 4s  40 = 0 Subtracting Eq. (6.16) from Eq. (6.15) and introducing the deviation variables Q = q  qs and H = h  h, gives Q=Ag Taking the Laplace (6.17) transform of each side of Eq. (6.17) and solving for H/Q gives
H(s) Q(s) = As
(6.18) Notice that the transfer function, l/As, in Eq. (6.18) is equivalent to integration. One realizes this from the discussion on the transform of an integral presented in Chap. 4. Therefore, the solution of Eq. (6.18) is (6.19) If a step change Q(r) = u(t) were applied to the system shown in Fig. 6.3 the result is (6.20) h(t) = h, + t/A The step response given by Eq. (6.20) is a ramp function that grows without limit. Such a system that grows without limit for a sustained change in input is q. = Constant
FIGURE
Liquidlevel system with constant flow outlet.
LINEAR OPENLOOP SYSTEMS
said to have nonregulation. Systems that have a limited change in output for a sustained change in input are said to have regulation. An example of a system having regulation is the step response of a firstorder system, which is shown in Fig. 5.6. The transfer function for the liquidlevel system with constant outlet flow given by Eq. (6.18) can be considered as a special case of Eq. (6:!), as R + Q). The next example of a firstorder system is a mixing process. l., _. Mixing Process
Consider the mixing process shown in Fig. 6.4 in which a stream of solution containing dissolved salt flows at a constant volumetric flow rate q into a tank of constant holdup volume V. The concentration of the salt in the entering stream, x (mass of salt/volume), varies with time. It is desired to determine the transfer function relating the outlet concentration y to the inlet concentration X. Assuming the density of the solution to be constant, the flow rate in must equal the flow rate out, since the holdup volume is fixed. We may analyze this system by writing a transient mass balance for the salt; thus Flow rate of salt in  flow rate of salt out = rate of accumulation of salt in the tank Expressing this mass balance in terms of symbols gives qx  4Y = d(b) We shall again introduce deviation variables as we have in the previous examples. At steady state, Eq. (6.21) may be written qxs  4Ys = 0 x = x  x ,

