共查询到19条相似文献,搜索用时 140 毫秒
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为纠正作业车间调度问题中蚁群算法搜索周期长、易陷入局部极小值的缺点,提出了一种改进的自适应非均匀窗口蚁群算法。首先,该算法通过自适应调整的非均匀窗口限制蚂蚁的移动范围,在缩短蚂蚁搜索周期的同时及时开辟新的解空间;然后,根据蚂蚁的多态性提出了蚂蚁跳跃窗口策略,赋予算法良好的跳出局部极小的能力;最后,鉴于作业车间调度中一个工件在多个机器上加工的特点,新算法对蚂蚁状态转移概率中的启发函数进行了改进,提高了路径的启发程度。通过对Muth and Thompson基准问题的仿真,验证了新算法的收敛性能。 相似文献
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《机电工程》2018,(11)
针对不确定的动态事件干扰混流生产车间预先调度实施的问题,对调度信息传递、车间扰动恢复、多目标优化等问题进行了研究。建立了以RFID技术为支撑的物联网环境下实时工况驱动的调度-重调两级动态调度机制,在物料消耗速率均衡化、最短化最小生产循环周期的两个预调度模型基础上,构造了混合布谷鸟搜索求解算法;基于扰动事件的特性,采取事件和周期混合驱动的调度策略,通过滚动窗口技术和混合布谷鸟搜索算法对重调度进行了求解,利用仿真平台对调度模型及混合布谷鸟搜索算法进行了测试。研究结果表明:该物联网环境的构建符合车间实时动态调度需求,能够实现工况信息的及时传递;调度机制能够有效应对各类扰动,满足了混流车间实际调度需要;算法求解速度快,获得的解质量良好。 相似文献
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针对最大-最小蚂蚁系统在求解顺序流水车间调度问题时易陷入局部最优的问题,对提升算法求解质量进行了研究。将最好-最坏蚂蚁系统的正负反馈机制、变异机制和模拟退火算法中Metropolis准则引入到最大-最小蚂蚁系统的信息素更新环节中,并引入局部寻优,提出了一种混合蚁群算法。在典型测试集上的实验表明,新算法在顺序流水车间调度问题上所得结果普遍优于最大-最小蚂蚁系统,具有更好的全局寻优能力。 相似文献
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考虑工时不确定的混合流水车间滚动调度方法 总被引:2,自引:0,他引:2
针对加工时间不确定的混合流水车间动态调度问题,提出一种基于滚动窗口的改进蚁群算法。为实现对事件驱动机制下重调度发生频率的有效缓冲,设计基于交货期偏差容忍度的滚动调度策略。同时为提高调度算法的计算效率,以应对现实生产中工时偏差的频繁发生,在滚动时域分解方法框架下提出一种改进的蚁群算法。一方面,通过压缩蚂蚁可选路径限制其移动范围,在缩短蚂蚁搜索周期的同时寻求新的解;另一方面,通过适当刺激蚂蚁尝试具有较弱信息素路径,提高所得解的全局性。通过实例仿真,分别对滚动调度策略和动态调度算法性能进行分析验证,得出较优的滚动调度策略参数,并验证了算法的优越性。最后给出实际生产算例,验证了滚动调度方法的有效性。 相似文献
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Fardin Ahmadizar Mehdi Ghazanfari Seyyed Mohammad Taghi Fatemi Ghomi 《The International Journal of Advanced Manufacturing Technology》2009,42(3-4):321-334
In this paper, we study a group shop scheduling (GSS) problem subject to uncertain release dates and processing times. The GSS problem is a general formulation including the other shop scheduling problems such as the flow shop, the job shop, and the open shop scheduling problems. The objective is to find a job schedule which minimizes the total weighted completion time. We solve this problem based on the chance-constrained programming. First, the problem is formulated in a form of stochastic programming and then prepared in a form of deterministic mixed binary integer linear programming such that it can be solved by a linear programming solver. To solve the problem efficiently, we develop an efficient hybrid method. Exploiting a heuristic algorithm in order to satisfy the constraints, an ant colony optimization algorithm is applied to construct high-quality solutions to the problem. The proposed approach is tested on instances where the random variables are normally, uniformly, or exponentially distributed. 相似文献
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Flow shop scheduling with multiple objective
of minimizing makespan and total flow time 总被引:2,自引:2,他引:0
D. Ravindran S.J. Selvakumar R. Sivaraman A. Noorul Haq 《The International Journal of Advanced Manufacturing Technology》2005,25(9-10):1007-1012
This paper deals with the multicriterion approach to flow shop scheduling [FSS] problems by considering makespan time and total flow time. The primary concern of flow shop scheduling is to obtain the best sequence, which minimizes the makespan, flow time, idle time, tardiness, etc. In this work, makespan and total flow time of the jobs are considered for minimization. Three heuristic algorithms namely HAMC1, HAMC2 and HAMC3 have been proposed in this paper. The effectiveness of the heuristics has been analyzed using the problems generated by Taillard [16]. The results of the problems are compared with the solution procedures proposed by Rajendran [15]. The new hybrid algorithms are developed by taking the seed sequences yielded by a method proposed by Rajendran [14] in his work to minimize flow time and improving it using search algorithm. The hybrid algorithm gives better results. 相似文献
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混合离散蝙蝠算法求解多目标柔性作业车间调度 总被引:3,自引:0,他引:3
针对以最大完工时间、生产成本和生产质量为目标的柔性作业车间调度问题,在研究和分析蝙蝠算法的基础上,提出一种混合离散蝙蝠算法。为了提高求解多目标柔性作业车间调度问题的混合离散蝙蝠算法的初始种群质量,在通过分析初始选择的机器与每道工序调度完工时间两者关系的基础上,提出一种优先指派规则策略产生初始种群,提高了算法的全局搜索能力。同时采用位置变异策略来使得算法在较短的时间内尽可能多地搜索到最优位置,有效地避免了算法早熟收敛。在计算问题的目标值上面,首次提出时钟算法。针对具体实例进行测试,试验数据表明,该算法在求解柔性作业车间调度问题上有很好的性能,是一种有效的调度算法,从而为解决这类问题提供了新的途径和方法。 相似文献
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针对具有工序约束信息的柔性流水车间的设备利用率优化问题,提出利用PSODE混合算法来解决该问题,全局优化过程采用群体优化算法,在局部优化过程中通过上下道关联工序约束信息来控制工件的分配,将并行工位总设备利用率作为适应度函数,构建了具有关联工序约束的柔性流水车间生产调度模型,确定生产工件的加工路径、加工顺序、开工时间和完工时间。通过多组方案数值计算结果对比分析,验证了PSODE算法解决柔性流水车间设备利用率优化问题的有效性。 相似文献
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在传统柔性作业车间调度问题(FJSP)中加入运输和装配环节,提出一种柔性作业车间多资源调度问题(MRFJSP),以完工时间最短为目标建立了包含加工、运输和装配的柔性作业车间调度模型。为了提高传统遗传算法(GA)在车间调度问题中的寻优能力,将粒子群算法(PSO)的寻优过程进行改进并与遗传算法进行结合,提出一种带保优策略的遗传-粒子群混合算法,利用单层编码对模型进行求解。通过算例验证了模型的可行性,并将提出的混合算法与遗传算法和粒子群算法进行比较,证明了混合算法的优越性。 相似文献
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Bo Liu Ling Wang Yi-Hui Jin 《The International Journal of Advanced Manufacturing Technology》2007,31(9-10):1001-1011
The no-wait flow shop scheduling that requires jobs to be processed without interruption between consecutive machines is a typical NP-hard combinatorial optimization problem, and represents an important area in production scheduling. This paper proposes an effective hybrid algorithm based on particle swarm optimization (PSO) for no-wait flow shop scheduling with the criterion to minimize the maximum completion time (makespan). In the algorithm, a novel encoding scheme based on random key representation is developed, and an efficient population initialization, an effective local search based on the Nawaz-Enscore-Ham (NEH) heuristic, as well as a local search based on simulated annealing (SA) with an adaptive meta-Lamarckian learning strategy are proposed and incorporated into PSO. Simulation results based on well-known benchmarks and comparisons with some existing algorithms demonstrate the effectiveness of the proposed hybrid algorithm. 相似文献
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M. Zandieh Behrouz Dorri A. R. Khamseh 《The International Journal of Advanced Manufacturing Technology》2009,43(7-8):767-778
This paper considers group scheduling problem in hybrid flexible flow shop with sequence-dependent setup times to minimize makespan. Group scheduling problem consists of two levels, namely scheduling of groups and jobs within each group. In order to solve problems with this context, two new metaheuristics based on simulated annealing (SA) and genetic algorithm (GA) are developed. A design procedure is developed to specify and adjust significant parameters for SA- and GA-based metaheuristics. The proposed procedure is based on the response surface methodology and two types of objective function are considered to develop multiple-objective decision making model. For comparing metaheuristics, makespan and elapsed time to obtain it are considered as two response variables representing effectiveness and efficiency of algorithms. Based on obtained results in the aspect of makespan, GA-based metaheuristic is recommended for solving group scheduling problems in hybrid flexible flow shop in all sizes and for elapsed time SA-based metaheuristic has better results. 相似文献