Modeling Research On Mixed Model Assembly Line Balancing Problem With Incorporate Of Ergonomics

With the increasingly fierce competition in the market and the rapid change of customer demand,in the manual assembly operation of discrete manufacturing enterprises,production assembly of mixed-flow assembly line which can assemble a variety of similar structures,similar products at the same time is gradually widely used.Mixed model assembly line balancing is a combination of production and assembly process optimization.It can effectively improve the quality of product assembly and production efficiency,but mixed-flow assembly line balance optimization becomes complicated due to increased factors.At present,for the mixed model assembly line balancing optimization is mainly for the purpose of production efficiency,and rarely consider the operation of workers operating experience.As an important component of the mixed model assembly line,workers are paying more and more attention to their health awareness and labor value.If the optimization of the mixed model assembly line is neglected,the physical and mental limitations of the workers will be affected,which will affect the stability and damage the physical and mental health of workers.Therefore,this paper considers the influence of the operator's own limiting factors in the optimization stage of the mixed-flow assembly line.From the aspects of controlling the physical and mental load of workers,this paper constructs a model of mixed model assembly line equilibrium considering human factor constraints,and explores the necessity of balancing the human-oriented production.First of all,from the balance of assembly line problem,mixed model assembly line balance problem,and the balance of assembly line considering human factors,this paper combs domestic and foreign related literatures,analyzes the achievements and shortcomings of existing research content,and summarizes the process of balancing optimization assembly line human factors and the key point of the basic methods for later analysis of the problem and the model to lay the foundation for the construction.Secondly,the basic conception of mixed model assembly line and the basic theory and solving method of mixed model assembly line balance problem are analyzed and introduced in detail.The first kind of mixed model assembly line balance problem is established as the research object of this paper.Then,the basic theory and research methods of Human Factors Engineering are summarized and analyzed.Combined with the operating characteristics of the workers on the mixed model assembly line,the physical exertion and mental tolerance are abstractly extracted as the balance of the physical and mental load index.Finally,to minimize the number of work stations,minimize the inter-station load index and minimize the load index in the mixed model assembly line,an equilibrium optimization model of the mixed model assembly line considering human factor constraints is constructed.Under the premise of ensuring the balance effect,workers are reasonably assigned to control their physical and mental load in a reasonable range.Genetic algorithm and hybrid genetic--simulated annealing algorithm are used to solve the model.Through the comparative analysis of the design example,the equilibrium scheme satisfying the human factor constraint is obtained,and the validity of the model and the algorithm is verified.