Question

how do i do even questions 1-12?

90 SECTION 2 The Controller d Where load chans The magnitude of the integraR Where lo Problems I. Which section of the closed-loop system performs the four 2. In an Oe-OfT beating system, an error signal is produced 19. a. h length of time the error - both a and b control modes? applied input voltage (above. when the measured temperature is below) the setpoint The term derivative means A derivative controllo portional to the ampi c. 3. List two factors that cause the controlled variable to deviate from the setpoint in an On-Off system 20. TF 21. By (increasing, decreasing) the On-Off differential gap, the cycle time is lengthened. 5. Calculate the differential gap percentage if a full tempera- ture control range is 80 degrees and the differential gap is 22. to, subtracts from) the out when the error signal is ge The output of the derivati The output of the derivativ 8 degrees. 6 If the output of the controller changes by 6 percent when the signal aPplied to its input changes by 2 percent, the 23. subtracts from) the propo signal is getting smaller. 24. As the rate of change of output increases, the der increases gain is 7 What is the PB setting of a controller that causes the final control element to change 100 percent when the ce its full range? rolled variable changes 25 percent of 25. The derivative function boost 8 The lagging effect of the controlled variable behind the error signal is called a. time delay b. hysteresis 9. T/F b. braking c. lag time d. all of the above By narrowing the PB, a closed-loop system may In a PID system plete and the pr integral functio 27. List which type of or mode functions: 26. T/F oscillate. 10. A system that oscillates is referred to as being a. stable 11. Steady-state error is also referred to as b. unstable Proportional: Integral: Derivative: 12. Offset is reduced by a. increasing the gain of the system b. narrowing the PB c. either a or b 28. A PID system that i following character a. Quick response b. No overshoot 13. T/F A setpoint change can also produce offset. 14. The mode is designed to eliminate offset. a. proportional b. integral 15. If the gain of a system is 4, the PB is 16. The longer time duration that a steady-state exists, the c. derivative 29. The term duty cyc . compared t a. on 30. When the voltage the integral action becomes. a. less the , the vc positive saturatic inverting b. greater 17. Another term for integral is a. rate a. b. reset 18. Proportional-integral control is used in which of ghe follow ing applieations? a. Were load diturbance occurs frequently and setpoint 31. A square wave t its off state will when its duty c hanges are in requent. a. 7.5 V 32. If the PB is 40 Where load di urbapes o cur frequently and setpoint b. hanges are freque

Answer 1

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