Search

Ports are opened infrastructures whose security is infl uenced by a plenty of parameters such as people/ vehicle fl ows. The movement of these fl ows must be accurately checked and controlled to ensure a correct management of security. In ports characterized by high fl ows, the security management must unavoidably use integrated access control systems that ensure a proper organization of the fl ows themselves. The present paper illustrates the work made to design and realize the integrated access control system of the most important commercial and tourist ports of Italy. Since the core of the access control system is represented by a server farm that must operate with a high effi ciency, to guarantee a fast response to the high fl ows of people and vehicles, the system is endowed with a loading balance mechanism of server farm itself, based on genetic controller, that ensures optimal operative velocities and performances, as demonstrated in the paper.

A proportional integral derivative (PID) controller is designed and attached to electro-hydraulic servo actuator system (EHSAS) to control the angular position of the rotary actuator which control the movable surface of space vehicles. The PID gain parameters are optimized by the genetic algorithm (GA). The controller is verified on the new state-space model of servo-valves attached to the physical rotary actuator by SIMULINK program. The controller and the state-space model are verified experimentally. Simulation and experi-mental results verify the effectiveness of the PID controller adaptive by GA to control the angular position of the rotary actuator as com-pared with the classical PID controller and the compensator controller.