Design of Cruise Ship Engine Room Ventilation System Based on Asymmetric Variable Universe Fuzzy Control

There is a lot of residual heat and exhaust gases emitted as numerous heating devices work in the cruise ship engine rooms. It is necessary to design the cruise ship engine room ventilation system so that the devices and personnel can work normally. The main research contents of this paper are: (1) The computational fluid dynamics (CFD) simulation model of the cruise ship engine rooms is established according to the ship information. Simulation data can be obtained by this model. (2) Comparing multiple system identification methods, the differential evolutionary identification algorithm is determined to be the most suitable algorithm for the engine environment and then a more accurate model of the control object can be obtained. (3) The domain, membership function and fuzzy rules of asymmetric variable universe fuzzy control are designed. Compared with various control methods, asymmetric variable universe fuzzy has obvious advantages in tracking and reducing overshoot.