PID Controller
A feedback controller that combines proportional, integral, and derivative terms to drive a measured process variable toward a target setpoint.
Embedded-System Context
A PID controller combines proportional, integral, and derivative terms to reduce the error between a measured process variable and a setpoint. Sampling period, actuator saturation, derivative noise, transport delay, and integral windup strongly affect behavior in a real plant.
Control Boundary
PID is not automatically optimal for nonlinear, constrained, strongly coupled, or rapidly changing dynamics. Tuning should be checked under disturbances, delays, and actuator limits rather than only against a nominal model.
Related Embedded-System Concepts
- Sensor Fusion
- Sample Rate
- Feedback Control
- Real-Time System