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By Christopher Kilian
This booklet uses abundant illustrations and transparent, no-nonsense factors to supply a primary realizing of contemporary automated regulate structures and business electronics. it's logically equipped, taking readers on a "virtual trip" via a regular keep watch over procedure, beginning with an creation, then relocating directly to speak about simple elements, sensors, wiring, automobiles, motor keep an eye on circuits, and mechanical elements. on the end, those useful components are "put jointly" by means of discussing regulate techniques and controller kinds, together with Programmable common sense Controllers. The textual content is either modern and complete in scope, with supplemental details on quite a few easy utilized physics and mechanical techniques, similar to linear and rotational movement, springs, friction, gears, levers, warmth move, and effort move now not present in different books in its category. electronic controllers and ideas are brought early and referenced through the publication. Analog strategies also are incorporated. This version beneficial properties new fabric on electronic "panel mount" controllers, differential gears, the Insulated Gate Bipolar Transistor (IGBT), ultrasonic proximity sensors, inductive proximity sensors, ultrasonic circulation sensors, and cascade keep an eye on. details has additionally been additional to higher deal with such subject matters as AC variable frequency motor drives, PID keep watch over, and the AS-I sensor manufacturing facility community.
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Extra resources for Modern Control Technology--Components & Systems
Example text
This voltage defines the maximum analog voltage—that is, for a digital input of 11111111, Vout is essentially Vref. If the input is 00000000, the Vout will be 0 Vdc. For all values in between, the output voltage is a linear percentage of Vref. 2 An 8-bit DAC has a Vref of 10 V. The binary input is 10011011. Find the analog output voltage. 34 CHAPTER 2 SOLUTION The binary input of 10011011 has a decimal value of 155. 05 V is the voltage we would expect on the analog output pin. 96 V, not 10 V as you might expect.
These instructions use two bytes. What number would be in the accumulator after the program shown below was run? 3 8. Temperature values from –20°F to 120°F are input data for a microprocessor computer. Are 8 bits sufficient? If so, what is the resolution? 9. Explain the function of the following: parallel data port and serial data port. 10. 11, with one stop bit. How long would it take to send 1000 bytes of data? 11. An 8-bit DAC has a reference voltage of 9 V. The binary input is 11001100. Find the analog output voltage.
One type of interfacing is between analog and digital circuits. Most controllers are digital, whereas many sensors and actuators use analog signals. This means analog-todigital or digital-to-analog converters may be required (as discussed in Chapter 2). When designing this type of interface, you must consider such things as resolution (number of bits), analog voltage level, and conversion speed required. 59 60 CHAPTER 3 Another interface problem is matching voltage levels between components. 5 V, whereas the receiving component may need a signal in the voltage range of 0-10 V.