A simple PI controller tuning rule for sensor energy efficiency with level-crossing sampling

Event-based sampling is currently an important topic in research and practice, because it allows saving energy in the sensor transmitter by avoiding unnecessary messages. The main contribution of this paper is a simple PI controller tuning rule adapted to the usage of level-crossing sampling with special focus on energy efficiency. The tuning rule uses a FOLPD (first order lag plus time delay) process model. It is shown that it is advantageous for sensor energy efficiency to tune the controller in a way which results in less overshoot than in periodic or continuous-time control. This result can also be applied to other types of controllers.