- System with electronic relay
- Adjustable hysteresis and dead zone
- Display phase plane diagram on CRO
- Stability study by describing function method
EXPERIMENTS
- Study of the relay characteristics and display of the same on CRO
for different values of hysteresis and dead zones. Hysteresis and dead
zone of the built-in 3-position electronic relay are adjustable in the
range 0-600mV and 0-500mV respectively. The transfer characteristics
and output of the relay under various settings provide insight into
the relay performance
- Study of the effect of hysteresis on system stability. Sustained
oscillations may occur in the system under various conditions, especially
where hysteresis is present. The amplitude and frequency of such oscillations
are predicted from a graphical analysis and then verified experimentally
on the unit
- Phase plane analysis of relay control system for various values of
hysteresis and Dead Zones. The nature of the singular point in the phase
plane diagram has importance in the stability studies of nonlinear systems.
Here the phase trajectory is viewed on the CRO and the effect of changing
hysteresis and dead zone observed
Features and Specifications
- Simulated electronic relay using high speed IC’s
- Simulated 2nd order linear plant. Facility for displaying x and x
signals
- Dead zone variable from 0-600mV app.
- Hysteresis variable from 0-500mV app.
- Built in signal sources - sine and square
Amplitude : 0-1V (min.) variable
Frequency : 10, 20, 40, 80, 100, 200,
400, 800 & 1000 Hz
- IC regulated internal power supplies
- 220V +/- 10%, 50 Hz main operation
- Literature and patch cords included
- Essential accessory - a dual beam CRO
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