The following controller types for effective closed-loop control of longitudinal airflow velocity in road tunnels in case of fire have been investigated and optimised: (1) PI-/PID-controller (proportional-integral-derivative controller) (2) MPC-controller (model predictive controller) In general, for the control of the longitudinal velocity in road tunnels, classic controllers as PI/PID-controllers are used. The control parameters are usually determined by "trial and error". However, if the control parameters are not optimised adequately, there is a risk of slow control and oscillating. Only with optimised control parameters, a fast and robust control can be guaranteed. A modern controller, which is becoming increasingly important in control theory, is the MPC-controller. The two controller types have been optimised and compared according to several criteria.
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