EC17 · Sem 6 · Control systems
PID speed control
Aim: Hold a motor at constant speed against a load disturbance.
🧪 Live simulation🧊 Real-time 3D bench⚠ Simulated values, not physical measurements
🔬 Virtual lab
Starting the lab…
📘 Theory
Speed is a first-order plant. A proportional controller alone leaves an error under load; adding integral action restores the set-point. The disturbance after half time shows disturbance rejection.
Type-1 system: zero steady-state error to a step
🧰 Apparatus (virtual)
- DC motor
- tachometer
- PI controller
- load brake
📝 Procedure
🎤 Viva questions
Why does a car cruise control need integral action
To hold speed on a hill without a permanent error.
What is integral wind-up
The integral grows while the actuator is saturated, causing overshoot later.
🛡️ Safety
Virtual lab. With real RF equipment, respect exposure limits, never transmit without a licence, and keep antennas away from people.