We offer Relay Control System use full for control labs. In the present unit a simulated second order system is controlled by an electronic relay. Apart from a study of the relay characteristics the experiment introduces the concept of Describing Function. Finally the phase plane method of analysis is covered in detail where the switching trajectories can be displayed on an X-Y oscilloscope.
>>Highlights
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.
Study of the effect of hysteresis on system stability. Graphical analysis to predict sustained oscillations.
Phase plane analysis of relay control system for various values of Hysteresis and Dead Zones. View the trajectory for different hysteresis and dead zone.
>>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
Hysteresis variable from 0-500mV
Built-in signal sources – Sine and Square Amplitude: 0-1V (min.)
Variable Frequency: 10, 20, 40, 80, 100, 200, 400, 800 and 1000Hz
IC regulated internal power supplies
Literature and patch cords included
Accessory - a dual beam CRO
The experiment is complete in all respect, except a CRO.

We offer Relay Control System use full for control labs. In the present unit a simulated second order system is controlled by an electronic relay. Apart from a study of the relay characteristics the experiment introduces the concept of Describing Function. Finally the phase plane method of analysis is covered in detail where the switching trajectories can be displayed on an X-Y oscilloscope.
>>Highlights
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.
Study of the effect of hysteresis on system stability. Graphical analysis to predict sustained oscillations.
Phase plane analysis of relay control system for various values of Hysteresis and Dead Zones. View the trajectory for different hysteresis and dead zone.
>>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
Hysteresis variable from 0-500mV
Built-in signal sources – Sine and Square Amplitude: 0-1V (min.)
Variable Frequency: 10, 20, 40, 80, 100, 200, 400, 800 and 1000Hz
IC regulated internal power supplies
Literature and patch cords included
Accessory - a dual beam CRO
The experiment is complete in all respect, except a CRO.