Control System Design Guide. Using your Computer to Develop by George Ellis PDF

By George Ellis

ISBN-10: 0122374703

ISBN-13: 9780122374708

It is a sensible method of keep an eye on suggestions. the writer covers heritage fabric on analog controllers, electronic controllers, and filters. regular controllers are provided. prolonged use of PSpice (a well known circuit simulation application) is utilized in challenge fixing. The e-book can also be documented with 50 machine courses that circuit designers can use.

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6) 4. Transform to the time domain. This is done while recognizing that a factor of 1/z in the ζ domain implies that the time-domain signal is delayed by one sample. The expression 1/z indicates a delay of two cycles. For ex2 From Transfer Function to Algorithm 27 ample, C(z) transforms back to C„ and C(z)/z transforms to C - . 7) 5. Rewrite the equation to calculate C„, the newest value of the output. 8) Program 3-1 b is a BASIC program that implements this filter and dis­ plays its step response.

High-frequency signals in analog control systems, if they aire present, are normally generated by the controller. This does not occur in digital systems because the microproces­ sor cannot generate any components with frequencies above half the sample rate. However, there are two possible sources of high frequencies: the com­ mand and resonances generated by the plant. High-frequency components in the command are normally corrected with a low-pass filter. Since this filter is not in the control loop, it does not affect the stability of the system.

Program 3-2 calculates the gain 25 50 100 Frequency (Hz) (c) Figure 3-3 Euler's integration. 200 400 30 3. BAS Euler's Integration 20 REM 30 REM This program calculates the phase and gain of digital integration 40 REM using Euler's method. 001 :REM System samples at 1 KHz 100 FREQ=25 :REM Start at 25 Hz 110 FOR I = 1 TO 21 :REM Eval at 21 Freq. 120 OMEGA=FREQ*2*PI :REM Omega in Rad/Sec 130 ZPHASE=OMEGA*TSAMPLE :REM Calc ζ Phase 140 REM 150 REM cos(wT) + j*sin(wT) 160 REM Calculate magnitude of Tz/(z - 1) = Τ * 170 REM cos(wT) + j*sin(wT) - 1 180 REM 190 REM Magnitude of numerator is just Τ since magnitude of ζ is one.

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Control System Design Guide. Using your Computer to Develop and Diagnose Feedback Controllers by George Ellis

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