The dynamic control strategy on the sate switching of normal condition- emergency condition in the emergency management system based on variable structure control

A series of emergency management mechanism have been developed to handle the emergency incidents. The information management system is the core of the mechanism. The information management system of project must combine normal condition with emergency condition. It is used in normal command, scheduler and information feedback in the case of normal conditionstate , and it could switch to emergent conditionstate quickly and controllability in the case of emergency. In this paper, a new discrete-time sliding mode variable structure control method is discussed. It attempts to establish the academic framework for the controllable switch to normal condition-emergency condition base on cybernetic. This method can buildup the dynamic anti-disturb capability very well in the switch process. Theoretical analysis and simulation results show that the proposed strategy not only satisfies the existence and reach condition of the discrete-time sliding mode, but also has a simple control rule. So, the system switch time can be ensured to reach the sliding mode rapidly.