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
State the functions of a fuse. Fuse is a protective device that made of a thin wire or strip. This strip or wire is placed with the circuit this has to protect, therefore the

Define pipelining? In 8086, to speedup the implementation of program, the instructions fetching and implementation of instructions are overlapped each other. This method is kno

Q. Describe about transmission-line voltage regulation? The transmission-line voltage regulation (TLVR) is the ratio of the per-phase voltage drop between the sending-end and r

Q. Write down Shockley's equation. What is its importance? I D = I DSS [1-(V GS /V P )]^2 Shockley's equation is used to plot transfer characteristics. The transfer charac

Give three reasons why a chamfer shouldn''t an "unimportant" dimension

Define branch prediction logic in Pentium. Branch prediction logic in Pentium: The Pentium microprocessor utilizes branch prediction logic to decrease the time required for a

The growth in communications over the past 60 years has been phenomenal. The invention of the transistor in 1947 and the integrated circuit and laser in 1958 have paved the way to

Q. Explain about Register marker? Register marker: Stronger selectors perform searching and counting . Though, the crossbar switch has no ‘intelligence'. Something external to

block diagram of eigen face,Viola & Jones Method,Bio-ID,RWTH-i6 Groups of People Database

Q. 10-kVA, 4800:240-V, 60-Hz, single-phase transformer has an equivalent series impedance of 120 + j300  referred to the primary high- voltage side. The exciting current of the tr