Block diagram of proportional and integral controller, Electrical Engineering

Q. Show Block diagram of proportional and integral controller?

The block diagram of Figure illustrates a typical microprocessor system used to implement the digital PI controller. It would be simple to include the derivative operation to implement the PID controller. While an analog timer is shown in Figure to determine the start of the next sampling period, a software timing loop can be used to keep track of when T seconds have elapsed. The output pulse, once every T seconds, is applied to the interrupt line of the microprocessor. This will cause the processor to execute the interrupt routine to output the next value of the control, u[(k + 1)T ], which is sent to the D/A converter, whose output in turn controls the power amplifier. The timing pulse from the timer is also sent to the "sample" command line, thereby triggering the sample-and-hold circuitry; the motor velocity ω(t) is sampled and held constant for one sampling period. The value of ω(kT) is then converted to an N-bit binary number by the A/D circuitry. The microprocessor is signaled via "data ready" line (which may be attached to the interrupt line of the microprocessor) that the sampled data have been converted. The second interrupt will cause the processor to read in the value of ω(kT) and then compute the next value of control, u[(k + 1)T]. After calculation of the control, the microprocessor waits for another interrupt from the timer before it outputs the control at t = (k + 1)T .An assembly-language program can be developed for the implementation of the PI controller.

2367_Block diagram of Proportional and integral controller.png

The control of a dc motor can be achieved with a PI controller discretized for microprocessor programming. The starting point is that the PI controller is described by a differential equation.

The latter is discretized at the sampling instants by one of the numerical approximation methods, and then is programmed in the microprocessor machine language.

Posted Date: 7/1/2013 7:52:55 AM | Location : United States

Related Discussions:- Block diagram of proportional and integral controller, Assignment Help, Ask Question on Block diagram of proportional and integral controller, Get Answer, Expert's Help, Block diagram of proportional and integral controller Discussions

Write discussion on Block diagram of proportional and integral controller
Your posts are moderated
Related Questions
If the instruments has no drift it is perfectly reproducible. No drift means that with a given input the measured values do not vary with time. Drift may be classified into thre

Q. Show the procedure of Octal to Decimal Conversion? To convert from Octal to Decimal, multiply the value in every position by its Octal weight and add each value. Using the v

Personal  safety Power supplies can be very dangerous. This is specifically true of high voltage circuits, but anything over 12 V must be treated as lethal potentially. A po

Draw layout of hydro-electric power plant and illustrate it briefly. Explain the following: a. Types of power plants b. Selection of power Plants

Write shorte note on Carbon. Carbon: The rate of commutator wear in electrical machines is greatly decreased by using brushes made of carbon. Carbon (C) is also used in autom

Q. Block schematic diagram of SS7? Levels are as below: Level 1: The Physical Layer Level 2: The Data Link Level Level 3: The signaling network level Level 4: The User Pa

I need help to build a circuit diagram for home energy management.It includes load controllers,a central system in which we should programme all of the control commands,and a two w

Phenol and Formaldehyde are polymerised to a resultant product known as (A) PVC.                                  (B) bakelite. (C)  Polyester.                        (D)

Q. A BJT is biased by the method shown in Figure. If V BEQ = 0.7V, β = 100, V CEQ = 10 V, and I CQ = 5 mA, find I 1 , I 2 , and IEQ.

Q. Using two 8-to-1multiplexers and one 2-to-1multiplexer, show how a 16-to-1 multiplexer can be obtained in the form of a block diagram.