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

By George Ellis

It is a sensible method of keep an eye on strategies. the writer covers heritage fabric on analog controllers, electronic controllers, and filters. generic controllers are provided. prolonged use of PSpice (a renowned circuit simulation application) is utilized in challenge fixing. The publication is additionally documented with 50 machine courses that circuit designers can use.

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Systems with ripple are usually unacceptable since they generally will ring in response to a step. Another measure of stability is closed-loop phase shift. As a general rule, phase lag without attenuation makes a control system more difficult to stabilize. This is important when your system is a subsystem of a larger loop. You do not want your system to have excessive phase shift because it will make the larger system difficult to stabilize. Normally, you should try to limit the phase shift at the - 3 - d B point to less than 120°, depending on the application and the customer.

40 had four constants that required a decimal point: C n = 1AR„ - \A2R . n x + 1 . 6 C - ! 12, you should scale integers and use fixedpoint math. Since these constants are less than 2 (as most ζ function constants are), scale the maximum value of the microprocessor constant to 2. 43) 48 3. 44) Since the divisor is an even power of 2, the division can be executed with a shift right of 14 places. 45) Executing a two-word multiply and ignoring the least significant word is the same as shifting right 16 places.

Normally, the system designer will try to make the response as fast as possible. This is particularly true of control systems manufacturers since fast response is an important selling feature. However, you should not always maximize response. For example, when motors respond too rapidly, they can damage mechanical components. - 1 Noise The third criterion is noise. Noise is low-level, high-frequency content on the output in the absence of a command. Do not confuse noise with oscillations from insufficient stability.

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