On-Off Control
On-off control, also known as bang-bang control, is a simple feedback control method where the output switches between two states (typically 'on' and 'off') based on whether the measured process variable is above or below a setpoint. It is commonly used in systems where precise control is not required, such as thermostats for heating or cooling, and is characterized by its simplicity and low cost. The controller activates the system fully when the variable deviates from the setpoint and deactivates it once the setpoint is reached, leading to oscillations around the desired value.
Developers should learn on-off control when working on embedded systems, IoT devices, or automation projects that require basic regulatory functions without the complexity of proportional or PID controllers. It is ideal for applications like temperature control in household appliances, simple motor control, or any system where binary switching suffices and energy efficiency or precision is not critical. Understanding this concept helps in designing cost-effective and reliable control systems for straightforward tasks.