Core Concepts
Embedded Systems
Dedicated computer systems designed for specific functions within larger mechanical or electrical systems.
PID Control
Proportional-Integral-Derivative control โ a feedback mechanism used to control systems by continuously calculating error and applying correction.
Sensors & Actuators
Sensors detect physical phenomena (temperature, pressure, light). Actuators convert electrical signals into physical action (motors, valves).
PLC (Programmable Logic Controller)
Industrial digital computers used for automation of electromechanical processes.
Industrial IoT (IIoT)
The use of IoT devices in manufacturing and industrial processes for monitoring, automation, and optimization.
Worked Examples & Applications
PID Control Formula: u(t) = Kโ ร e(t) + Kแตข ร โซe(t)dt + Kโ ร de(t)/dt, where: Kโ = proportional gain, Kแตข = integral gain, Kโ = derivative gain, e(t) = setpoint - measured value.
Example: Cruise Control: Setpoint: 60 mph. Measured: 55 mph. Error: 5 mph. P term: Kโ ร 5 (increase throttle). I term: โซ5dt (sustained error adds more). D term: d(5)/dt (if error growing, respond faster).
Practice Questions
Q: What does PLC stand for? A: Programmable Logic Controller โ a ruggedized computer used for industrial automation.
Q: What is the difference between a sensor and an actuator? A: A sensor detects physical phenomena and converts them to signals. An actuator converts signals into physical action.