Moku:Lab's Laser Lock Box : When and how should I use the slow PID controller?
Moku:Lab fast and slow PID controllers
Written by Paul Cracknell
Updated at February 5th, 2021
-
Moku:Go
Moku:Go Arbitrary Waveform Generator Moku:Go Data Logger Moku:Go Frequency Response Analyzer Moku:Go Logic Analyzer & Pattern Generator Moku:Go Oscilloscope & Voltmeter Moku:Go PID Controller Moku:Go Spectrum Analyzer Moku:Go Waveform Generator Moku:Go Power Supplies Moku:Go Digital Filter Box Moku:Go FIR Filter Builder Moku:Go Lock-in Amplifier
- Moku:Lab
- Moku:Pro
When stabilizing lasers, it is common to need to provide feedback control loops to multiple actuators.
A common situation involves one fast actuator with limited range (e.g. current or piezo); and one slow actuator with a much larger range (e.g. temperature).
The slow PID controller acts on the fast PID controller’s output, keeping it centered around zero and thus maximizing the dynamic range for the fast feedback control.