共查询到19条相似文献,搜索用时 546 毫秒
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在数控加工中,为实现生产率最大化和生产成本最小化,根据机床和刀具的实际约束条件建立了以进给量和切削速度为变量的数学模型,并利用具有全局搜索能力强、收敛速度快和鲁棒性高的量子粒子群算法(QPSO)进行优化,仿真结果表明其效果远远优于经验值,也优于粒子群算法(PSO)优化结果。 相似文献
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粒子群优化算法(PSO)是一种基于群智能的优化方法,量子粒子群优化算法(QPSO)是基于PSO进行改进的算法,规则简单、收敛速度快、易于编程实现。对于多目标、多约束条件的重载齿轮的优化设计,本文提出了一种基于QPSO优化求解的设计方法;实践表明能够快速、有效求得优化解,是求解重载齿轮优化设计问题的一个较好方案。 相似文献
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本文面向低碳的数控加工多目标优化模型将数控加工的切削速度和进给量作为模型的优化变量,从机床主轴的转速约束、进给量约束等约束条件建立了最短加工时间和最低碳排放的优化模型,并简单介绍了求解数值优化问题的常用方法和MATLAB优化工具箱。 相似文献
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针对铸造高温合金K423A,采用硬质合金刀具进行内圆车削试验研究,跟踪观察刀片的磨损状态,以切削效率和刀具寿命为指标优化工艺参数。研究表明,相比于进给量,切削速度对刀具寿命的影响更为显著,在进给量为0.1~0.2 mm/r范围内,切削速度为10 m/min时表现出了较好的刀具寿命,切削路程是其他条件下的1.5~4倍。同样地,切削速度对材料去除量的影响更大,为实现相同切削效率,选取较小的切削速度,相应地增大进给量,可以获得较大的材料去除量。 相似文献
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高速加工时各切削参数对切削力影响的模拟研究 总被引:1,自引:0,他引:1
切削力是切削过程中重要的物理参数之一。本文应用数值模拟,对高速切削加工过程中切削参数(切削速度、进给量、切削深度)对切削力的影响进行了研究,给出了切削力随切削速度、进给量、切削深度的变化规律,对优化高速切削工艺及建立高速切削数据库具有指导意义。 相似文献
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采用TC11钛合金车削正交试验研究了各车削参数对切削温度和切削力的影响规律,进一步分析车削参数和表面粗糙度的内在联系。结果表明:切削温度与切削力相互影响,当切削速度在50~100m/min时,切削速度越高,刀具对工件挤压越剧烈,且切削温度升高并使工件软化,导致切削力减小。通过极差分析发现,影响切削力的切削参数依次为切削深度>进给量>切削速度,影响切削温度的切削参数依次为切削速度>进给量>切削深度;对于表面粗糙度各切削用量影响程度大小依次为进给量>切削速度>切削深度。在本次试验参数内,得到了最优切削力的切削参数和最优表面粗糙度的切削参数。研究结果对于加工钛合金的切削参数优化提供一定指导。 相似文献
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S. Bharathi Raja N. Baskar 《The International Journal of Advanced Manufacturing Technology》2010,48(9-12):1075-1090
Simulated annealing, genetic algorithm, and particle swarm optimization techniques have been used for exploring optimal machining parameters for single pass turning operation, multi-pass turning operation, and surface grinding operation. The behavior of optimization techniques are studied based on various mathematical models. The objective functions of the various mathematical models are distinctly different from each other. The most affecting machining parameters are considered as cutting speed, feed, and depth of cut. Physical constraints are speed, feed, depth of cut, power limitation, surface roughness, temperature, and cutting force. 相似文献
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切削用量的合理选择对提高机床使用效率、降低生产成本有很大的帮助。根据线性加权和法,以进给量和切削速度为变量,以最大生产率和最低生产成本为目标建立优化数学模型,并且考虑机床和刀具的约束,利用粒子群算法在MATLAB上对数学模型进行寻优求解。实例表明,优化后的切削用量能明显地降低成本、提高效率。 相似文献
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N. Mokas L. Boulanouar A. Amirat L. Gautier 《The International Journal of Advanced Manufacturing Technology》2018,95(9-12):3227-3242
For metallic or composite materials, the judicious choice of cutting conditions depends on several factors that may be of such objectives (time, cost of production, material removal rate, etc.) or constraints (cutting force, temperature in the machining area, consumed power, etc.). The quality of the results depends on the optimization method and the efficiency of the algorithm involved. In this paper, graphical and particle swarm optimization (PSO) methods are proposed. They aim to determine the optimal cutting conditions (cutting speed and feed per tooth) in slotting of multidirectional carbon fiber reinforced plastic laminate (CFRP), referenced G803/914, with three knurled tools having different geometries. The experiences that led to the measures of roughness, temperature, cutting efforts, and consumed power are made in the same working conditions with cutting speed ranging from 80 to 200 m/min and feed per tooth from 0.008 to 0.060 mm/rev/tooth. The results illustrate that for the graphical method, the optimum cutting speed depends on the performance “maximum total removal rate” and is the same for all the studied knurled tools while optimum feed per tooth depends on the “roughness” performance: its value depends on the tool geometry. For the PSO technique, optimum cutting speed and feed per tooth values are variable and depend on the tool geometry. 相似文献
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倾斜角度的测量精度直接决定了状态控制系统的工作效果。在单一传感器测量倾斜角度的研究基础上,探讨了传感器数据融合技术用于倾斜角度测量的方法。首先分析基于加速度计和陀螺仪测量倾斜角度的原理,并研究加速度计和陀螺仪测量结果的频率特性;然后根据加速度计和陀螺仪测量结果的频率特性选定互补滤波器作为数据融合的方法;最后选定量子粒子优化群(QPSO)算法作为互补滤波器的参数寻优方法,并对比量子粒子优化群算法和粒子群优化算法的参数寻优效果。实验结果表明,互补滤波器可以在广泛频域范围内准确测量倾斜角度值,并且量子粒子群优化算法相对于粒子群优化算法具有更好的参数寻优效果。 相似文献
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R. Saravanan R. Siva Sankar P. Asokan K. Vijayakumar G. Prabhaharan 《The International Journal of Advanced Manufacturing Technology》2005,26(1-2):30-40
Optimum machining parameters are of great concern in manufacturing environments, where economy of machining operation plays a key role in competitiveness in the market. Many researchers have dealt with the optimization of machining parameters for turning operations with constant diameters only. All Computer Numerical Control (CNC) machines produce the finished components from the bar stock. Finished profiles consist of straight turning, facing, taper and circular machining.This research work concentrates on optimizing the machining parameters for turning cylindrical stocks into continuous finished profiles. The machining parameters in multi-pass turning are depth of cut, cutting speed and feed. The machining performance is measured by the production cost.In this paper the optimal machining parameters for continuous profile machining are determined with respect to the minimum production cost subject to a set of practical constraints. The constraints considered in this problem are cutting force, power constraint, tool tip temperature, etc. Due to high complexity of this machining optimization problem, six non-traditional algorithms, the genetic algorithm (GA), simulated annealing algorithm (SA), Tabu search algorithm (TS), memetic algorithm (MA), ants colony algorithm (ACO) and the particle swarm optimization (PSO) have been employed to resolve this problem. The results obtained from GA, SA,TS, ACO, MA and PSO are compared for various profiles. Also, a comprehensive user-friendly software package has been developed to input the profile interactively and to obtain the optimal parameters using all six algorithms. New evolutionary PSO is explained with an illustration . 相似文献
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针对污水处理过程所具有的多变量、非线性和大时滞的特点,在污水生化反应过程中提出基于免疫粒子群的参数估计方法。在粒子群进化过程中,引入免疫算法机制,通过抗体与抗原的参数计算来促进或抵制抗体的进化,保证粒子群进化的多样性,指导粒子群的优化过程,克服粒子群算法的早熟现象,加快收敛速度和提高全局寻优能力,成功估计模型参数。应用免疫粒子群算法在各类工程模型确定中有较大的应用潜力。 相似文献