Research On Integrated Scheduling Of Manufactu-Ring Work-shop Under Time-sharing Tiered Electricity Price

With the intensification of product market competition and the increasing lack of energy,how to achieve JIT production under the premise of energy saving is a problem for manufacturing companies.This article takes the order-oriented processing-assembly enterprise as the background,with the main goal of reducing the cost of power consumption in production and assembly,combined with the time-sharing tiered electricity price policy,the systematic study of the integrated scheduling problem in the processing and assembly enterprises is of great significance for the enterprises to achieve the just in time production under energy saving.Taking the order-oriented processing-assembly enterprise as the research object,this paper analyzes the production management process under JIT,proposes the integrated scheduling production management architecture based on IOT,and analyzes the key technologies involved in the architecture.For the optimization of energy-saving scheduling in the production and processing process under the time-sharing tiered electricity price,considering the energy consumption of equipment processing and standby,with the goal of minimizing the energy consumption cost of the processing process,the introduction of a power-off and power-off strategy for the equipment to shut down and restart during idle time,considering the constraints of processing equipment and other resources and processes,a single-objective optimization mathematical model is established.To solve this mathematical model,a three-layer coded single-object firefly algorithm based on workpiece sequence,start-up time,and on-off strategy is designed.The encoding iteration process uses Hamming distance instead of Euclidean distance to calculate the distance between fireflies.The POX crossover is used to replace the location update operation to ensure the feasibility of the solution.For the start time encoding,the standard firefly algorithm is used to iterate.Perform repair operations on infeasible solutions to avoid infeasible solutions affecting the algorithm results;and verify the correctness of the model built and the effectiveness of the algorithm through examples.Aiming at the problem of process planning and integrated production scheduling under timesharing tiered electricity price,with the minimum power consumption cost and the minimum maximum load of the equipment as the optimization goals,the on-off strategy of shutting down and restarting the equipment during idle time is introduced,and a multi-objective optimization mathematical model is established;In order to facilitate the solution of the model,a multiobjective firefly algorithm based on five-layer coding is designed,and elite strategies are introduced to protect the excellent firefly individuals in the iterative population;and the correctness and effectiveness of the built model are verified by examples.Aiming at the integrated scheduling of processing and assembly under the time-sharing tiered electricity price,with the goal of minimizing the cost of power consumption and delay in processing and assembly during processing and assembly,comprehensively considering the constraints of equipment resources and processing and assembly procedures,the introduction of equipment idle time shutdown and restart operations Switch on/off strategy,establish a multiobjective mathematical model,design a multi-objective firefly algorithm with elite strategy based on three-layer coding to solve,and verify the validity and correctness of the built model through examples.Designed and developed a prototype system for integrated production scheduling under time-sharing tiered electricity price.The main functional modules of the system are determined by analyzing the working process of the system.The prototype system is developed by using H5,JavaScript,C#,bootstrap front-end framework and visual studio platform.