I've been working on the engine control unit for trucks. I think the fastest control loops were 100Hz (but that was only a few), fixed time intervals. Then, of

I've been working on the engine control unit for trucks. I think the fastest control loops were 100Hz (but that was only a few), fixed time intervals. Then, of course, you have the fuel injection that is controlled by its own processor, independent of the ECU scheduling. Nowadays I work with satellite SW. Most of the control loops are pretty slow. The fastest ones are those controlling gyros and reaction wheels that run in 5 or 10Hz