Block diagram of proportional and integral controller, Electrical Engineering

Assignment Help:

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.


Related Discussions:- Block diagram of proportional and integral controller

Write explanatory notes on 8284 clock generator, Write explanatory notes on...

Write explanatory notes on 8284 Clock generator. The 8284 is an ancillary element to the microprocessors. Without this clock generator, a few additional circuits are needed to

Find the resistance of 1 km of copper cable, Find the resistance of 1 km o...

Find the resistance of 1 km of copper cable having a diameter of 10 mm if the resistivity of copper is 0.017 x 10 -6 Ωm.

Explain factors affecting permeability and hysterisis loss, Explain the fac...

Explain the factors affecting permeability and hysterisis loss. Factors affecting permeability and hysterisis loss: When the initial permeability is high, the hysterisis los

Diatomic molecules in three dimensions, Consider the open rotation of a dia...

Consider the open rotation of a diatomic molecule consisting of two atoms of mass and respectively divided by a distance presume that the molecule is rigid with center of mass fixe

Determine the slip at maximum torque, A three-phase induction motor, operat...

A three-phase induction motor, operating at its rated voltage and frequency, develops a starting torque of 1.6 times the full-load torque and a maximum torque of 2 times the full-l

What is the voltage gain of common gate amplifier, Q. What is the voltage g...

Q. What is the voltage gain of common gate amplifier? The controlled source gmVgs is connected from drain to source with rd in parallel.The resistor is connected Rs is connecte

Depletion type mosfet, Depletion type MOSFET The channel is of silico...

Depletion type MOSFET The channel is of silicon. It can be two type of channel that is an n-type or p-type channel; it is still mostly silicon. After that, we take note that

Higher order address bus - pins and signals , Higher order  Address Bus ...

Higher order  Address Bus The 8085 microprocessor  has 8 pins  dedicated to higher order address A15 - A8. These pins  are used to connect  higher  order address bus. These  p

Drive operating envelopes and induction machines, Solve using data from the...

Solve using data from the DC machine data sheet, using the "hot" resistance value for all calculations. Note that the value of K on the sheet is for rated (100%) field flux.  Assum

Add instruction , ADD Instruction Op code  format  of ADD instruction...

ADD Instruction Op code  format  of ADD instruction is Replace  the three bit code  of the register R from   to obtain the op code of the  required ADD instruction . op co

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd