Simulation of standard signals plays vital role in the study of control engineering. Some of the signals are repetitive in nature, like SINE, SQUARE, TRIANGLE etc, While some of them are non-repetitive. Non repetitive signals are single pulse or step input, parabola etc. There is a need to apply these as input to a control circuit to study the performance of a controller. This trainer is intended to simulate the basic test signals, like Step input, Ramp input and simulated Parabola. Using this trainer, it is possible observe the waveforms of basic test signals at the respective output terminals.
a) Parabola generation
b) Step generation
c) Ramp generation a) Parabola Generation:-
Parabolic test signal is a waveform obtained from the equation Y? = 4AX+C For various values of x find Y? from the equation above. By plotting the x and y values in a graph sheet parabola waveform can be obtained. The purpose of this exercise is to show how this can be computed and verified after experiment. A graph of X Vs Y produces the parabola function. The value of X and C can be simulated using different voltages to define the parabola curve. Taking square root of Y? gives both positive and negative values of y i.e. ? y. b) Step Generation:-
Step test signal produces a two-state pulse as long as the pulser is pressed. The output swings in the range of 0 to 4V DC. c) Ramp Generation:-
Ramp test signal is a waveform that rises from 0 to +5 volts in a particular time period and once it reaches +5 volts it suddenly drops to zero without any delay. The repetitive rate can be changed in the range of 700Hz to 1Khz with peak amplitude in the range of 0 to 5V DC. This trainer has necessary processing blocks to accomplish the above function generation. This unit has necessary power supplies and signal sources. An external digital multimeter and a 15MHz dual beam Oscilloscope is required to view the waveforms. |
