This section provides a quick preview of questions from the document. It may not display every question or the complete wording of each one. For the full content, including diagrams, tables and other information, view the original PDF above.
Q1— Section header —
1.10in the ANSWER BOOK COLUMN A COLUMN B
1.10A control system using pressuris ed liquid to transmit and control power Converts one form of energy to another A control system that will remain at rest unless excited by a changed manipulated variable
Q2— Section header —
Q3— Section header —
3.1The peak gain value (1\
3.2The phase value at a frequency of 250 rad/s (1\
3.3The frequency at the peak gain value (1\
3.4The gain cut off between 10 rad/s and 100 rad/s (1\
3.5The gain crossover frequency (1\
3.6The phase crossover frequency (1\
3.7The gain margin (1\
3.8The phase margin (1\
3.9The stability of the system in terms of the gain and phase response (2\ [10] G2 (8080016\10
Q4— Section header —
4.1Plot the gain and phase values for an open loop control system onto a Nichols chart using the data in the table. Magnitude in dB Phase in degrees 0,1 28,6
2.56
4.2Use the Nichols chart to determine the following:
4.2.1The gain margin
4.2.2
4.3From the Nichols chart determine the additional gain in dB required and by what factor the gain constant must be changed in order to give a gain margin of 10dB. (2\ [10 ]
Q5— Section header —
5.1The open loop poles and the zeros
5.2Do some of the loci break away? Explain.
5.3The centre of asymptotes
5.4The asymptotic angles
5.510
Q6— Section header —
6.1The transfer function of a control system is given as The input function is given as : Using the Laplace transform tables:
6.1.1Determine the Laplace transform of the input ( (2\
6.1.2Write an expression for t he output response in terms of 's' (3\
6.2Express the given function in terms of the equivalent Laplace transformation: (2\
6.3Convert the given transform function to a function of time: (3\ [10]10
Q7— Section header —
7.1State the main function of a transducer. (2\
7.2Name TWO types of photo electric transducers. (2\
7.3State the TWO conditions a rectifier has to satisfy, in order to convert the A.C signal into a D.C . signal. (2\
7.4Name TWO disadvantages of potentiometers. (2\
7.5Give TWO practical applications of an electronic self balancing potentiometer. (2\ [10] (8080016\10
Q8— Section header —
8.1List the THREE main design considerations when designing a hydraulic system. (3\
8.2FIGURE 2 below shows a diagram of a simple servo mechanism with mechanical feedback. Study the diagram a nd identify the parts label ed A G.
Q9— Section header —
9.1State TWO disadvantages of using integral control in pneumatic systems. (2\
9.2State FIVE advantages of using pneumatic systems. (5\
9.3hat is the purpose of introducing a derivative controller in a proportiona lly controlled pneumatic system? (2\
9.4Explain the term hunting with regard to proportional control. (1\ [10]10
Q10— Section header —
10.1The sine wave is one of the most commonly used waveforms in signal generation. Name THREE other types of waveforms. (3\
10.2State how the display of an analogue meter differs from that of a cathode ray oscilloscope. (2\ (8080016\ T430(
10.3State THREE advantages of sine waves in signal generation. (3\
10.4The saw tooth wave is extensively used in electronics. Give TWO applications of this type of waveform. (2\ [10 ] TOTAL:
Q3— Section header —