Research And Implementation Of Elevator Group Control Strategy Based On Fuzzy Inference

With the enhancement of people’s concept of time,the requirements for elevator group control performance are getting higher and higher.The traditional "minimum waiting time" group control strategy has poor performance.The application of artificial intelligence technologies such as expert systems,neural networks,and fuzzy inference in elevator group control is a current research hotspot.This topic studies the group control elevator traffic pattern recognition and dispatch strategy based on fuzzy reasoning.The upper computer realizes the dispatch strategy and the realization scheme of one PLC controller for each elevator.The upper computer adopts C++ programming language.Mainly completed work:(1)Traffic pattern recognition based on fuzzy reasoning.Analyze the traffic variables describing the characteristics of passenger flow,analyze the characteristics of passenger flow traffic patterns at different periods,and design a discrete fuzzy inference machine for traffic pattern recognition.An implementation program has been written,and tests have shown that it can accurately identify the current traffic mode.(2)Elevator group control strategy based on fuzzy reasoning.According to the characteristics of elevator group control system,the objective function of elevator group control system is established.Based on the established objective function,an elevator group control strategy based on fuzzy inference is designed,including the calculation of input variables,the fuzzification of input variables,the formulation of fuzzy rules,fuzzy inference and deblurring.The realization program is written,and the test shows that it can achieve the group control expectations.(3)Implementation of elevator group control system.The overall scheme of the elevator group control system is designed.The upper computer realizes functions such as traffic pattern recognition and elevator dispatch,and the lower computer realizes signal collection and elevator operation control.Define upperand lower computer communication protocol,write upper computer management program and upper and lower computer communication program.(4)Application test in elevator model.Use the laboratory elevator model to debug the system.First modify and debug a single elevator program to achieve basic functions;debug the communication between the upper computer and the lower computer,and implement signal transmission according to the protocol;system debugging,the upper computer uses a group control strategy to collect passenger information,realize call,dispatch and operation The three elevator group control.