ABSTRACT
Modern lift group control systems have two types of functions: main function and supporting functions. The function of allocating the landing calls to the lift cars can be generally classified into four types of methods. These are rules-set-based systems, objective function optimisation systems, sectoring systems, and adaptive systems. The landing call assignment is usually made based on minimising the system response time to the landing call. Some group control algorithms rely on the knowledge of the current traffic mix in order to trigger a different set of rules or a different optimisation objective function. This chapter describes examples of automatic detection of traffic patterns in a building. It has been possible to revoke a landing call assignment to a lift car if a better assignment is found later. There are two cases where early call announcement is adopted: conventional lift group control system and hall call allocation lift group control systems.
