基于成组编码的零件制造成本评价

根据敏捷制造的特点，在分析现有零件制造成本评价方法的基础上，提出了基于成组编码的零件制造成本评价方法，并以冲压件为例，制定了基于成本特征的零件成组编码系统，实现了敏捷制造模式下零件制造成本的快速评价。     

面向DFM评价的制造特征自动获取方法

运用体素分解、体素拼合,自由度分析和加工过程特征等技术,为基于产品设计特征模型的ＤＦＭ评价系统,提供了制造特征自动获取方法,为基于特征的可制造性评价和成本估算奠定基础。     

分布交互仿真预估算法的数字仿真分析

基于Ｃ＋＋面向对像的编程，设计出分布交互仿真的预估算法分析系统。模拟 对点、多点地多点通信状态下，预估算法的工作过程，对预估算法的效果进行了研究。     

变电企业工程项目的成本评价

随着国家经济的迅速增长和电力市场化的改革的推进，我国变电行业发生着重大变迁。2003年7月1日施行的《建设工程工程量清单计价规范》将变电建设项目纳入范围之内;2006年批准的《建设工程项目管理规范》中要求企业要从两个方面进行项目成本管理：因此运用科学管理方法降低施工企业成本，加强项目成本管理，提高企业效益，成为当前企业面临的一项函待解决的课题。本文针对这一问题，从各个方面给予了较详细的论述。进而改善评价体系，强化企业的工程项目成本意识，并且达到控制成本、提高企业竞争力的目的。     

层次分析法在爆破议案优化中的应用研究

本文论述了运用层次分析法（ＡＨＰ）综合评价与分析爆破总成本、各项分成本以及待选的爆破方案之间的层次结构关系，评选出了最优爆破方案。     

基于评价知识的图象分割算法优选系统

报道了基于评价知识对分割算法进行优选的研究进展。提出了通用分割评价框架和客观定量的分割质量评价准则，据此利用对算法进行评价和对分割效果进行比较的方法实现了第一个图象分割算法优选系统。讨论了基于评价知识选取最优分割算法的策略和系统设计的原理，给出了用实际图象进行算法优选和分割得到的结果，验证了系统的有效性。     

基于成组技术的产品成本评估方法

并行工程是一种新的制造思想和生产概念,面向制造的设计(DFM)是并行工程研究的重要内容,成组技术是现代生产技术的重要基础。本文提出采用成组技术的方法,建立基于特征的零件成本评估模型,以对新设计零件进行可制造性评价,从而改进新产品的设计。     

基于特征的零件加工成本评价

提出了一种基于零件形状特征及特征间关系的成本评价方法。又根据不同加工方式建立了成本模型,并利用有向图来表示加工过程,把加工成本评价问题转化为最小路径问题求解。     

先进复合材料可制造性中的成本估算理论框架

飞行器复合材料构件的可制造性评价是其结构制造工艺方案决策的重要依据,成本是评价体系中的一个重要指标。本文概述了先进复合材料可制造性中的成本概念及组成,应用过程估算方法建立了成本指标的估算理论框架及初步模型。通过对工时估算理论的分析,提出了适合于过程估算方法的工时概念关系式。应用本文所提出的先进复合材料可制造性成本估算理论,能够有效地建立较为实用的可制造性成本评价估算模型。     

分布交互仿真预估算法的数字仿真分析

基于C＋＋面向对像的编程,设计出分布交互仿真（DIS）的预估算法分析系统,模拟点对点、多点对多点信状态下预估算法的工作过程,对预估算法的效果进行了研究．     

System for early cost estimation of die-cast parts

Early cost estimate of a part is important information and forms a basis for preparing quotations, which are competitive from a market point of view. It is seen that a commonly adopted approach of variant cost estimation based only on geometric information of the component is not always accurate. This is also true in the case of die-cast parts. The geometric complexity of the part, tooling complexity, part and tool material, processing cost, and manufacturing resources for producing the part all need to be considered for accurate cost estimation. This paper deals with a comprehensive system developed to estimate and analyze the manufacturing cost of die-cast parts. A computer-aided cost-estimation system has been developed that applies manufacturing process as well as manufacturing resource considerations in addition to part feature complexity. Use of the proposed system is demonstrated in selecting the optimum number of cavities and the appropriate manufacturing resources under machine-related constraints. Further, the cost-estimation system developed herein is used for carrying out feature sensitivity analysis to identify design features that add significant cost to the part. The use of this system for optimal machine loading in multiple parts situation is also demonstrated.     

设备功能的相似性评价技术研究

根据数控加工设备的特点,采用特征建模技术建立数控加工设备信息模型;基于该模型,提出设备相似性评价体系.通过实例分析,证明了该模型和评价体系的有效性.     

Cost estimation system for machined parts

Estimating the manufacturing cost of a machined part is a critical task with high importance to manufacturing firms. Accurate cost estimation is important for cost control, successful bidding for jobs, and maintaining a competitive position in the marketplace. There are three main approaches towards cost estimation: estimation based on past experience (variant cost estimation), estimation based on explicit cost computations, and parametric cost estimation. This paper presents a hybrid cost estimation system for rotational parts that uses a combination of the variant approach and explicit cost calculations. The variant approach is used to retrieve machining parameters from a database of past parameters. The explicit cost calculations are based on the part geometry, the cutting tools available and the machining parameters retrieved. The system presented calculates the time that a part needs to stay on the machine. This time, which includes processing, set-up (chucking and re-chucking) as well as tool changes, is used to find the machining cost.     

New integrated model to estimate the manufacturing cost and production system performance at the conceptual design stage of helicopter blade assembly

This paper describes a new integrated model development to estimate the manufacturing cost and production system performance at the conceptual design stage. A fully automated conceptual framework for design for manufacturing (DFM) has been developed. An integrated product process design concept using activity based costing is applied in this paper. The new integrated model consists of four sub-modules: the geometric parameters generation module, processing time estimation module, activity based costing (ABC) module and production system performance module. All of the input-output data flows of developed modules are fully integrated for automated manufacturing cost analysis and production system performance. A developed integrated model is very useful for designers or integrated product development team to make a decision for evaluating the design alternatives and trade-offs between design and manufacturing phases at the conceptual design stage. A case study for a composite helicopter rotor blade is included.     

热压釜成型复合材料波纹梁工艺工时估算

成本估算是目前复合材料领域开发研究的关键问题之一,而工艺工时估算又是制造成本估算的核心。本文中建立复合材料制造工艺工时估算模型,以热压釜成型复合材料波纹梁为研究对象进行理论分析和实验研究,给出此估算模型中估算变量和方程参数的确定方法并应用最小二乘法将所得数据进行拟合,其结果与实验结果基本一致。介绍了估算模型中参数随制件曲度变化的修正方法,为实现不同结构设计的工时估算提供指导。     

复合材料结构制造成本估算模型及软件开发

基于制造工艺过程的成本估算模型,采用Delphi 可视化编程语言和SQL server数据库开发工具,开发了复合材料制造成本评估软件。介绍了基于制造工艺过程的成本估算模型的基本特点,重点讨论了工艺时间模型并分析了构件复杂程度对工艺时间的影响。此外,通过引入曲率熵的概念,对前人提出的构件复杂性因子进行了改进,以便更合理地描述构件的复杂度。提出了成本估算软件的总体方案,确定了软件实现流程,并建立了成本数据库管理系统。列举了用该软件对一种复合材料单曲率板的制造成本进行估算的过程。应用所开发的软件对某型飞机的复合材料副翼和金属副翼的制造成本进行了估算,估算结果表明,复合材料副翼由于采用了低成本工艺与整体化的设计理念,其制造成本低于金属副翼。      

A graph-based model for manufacturing complexity

This paper presents a graph-based model to measure the relative manufacturing complexity of and the manufacturing similarity of products in job shop manufacturing systems. This model depicts the impact of the complexity factors on the profit realisable from products based on their manufacturing process and required resources/skills. These resources deal with the process required for a component to reach assembly, the process of assembling the components to a whole product. This relative manufacturing complexity measure not only can support assembly and production cost estimation, but also can provide a guideline for creating a product with the most effective balance of manufacturing and assembly. Also, the results of this study can help improve budgeting and resource allocation, and the product life cycle cost estimation for future products. A numerical example is also presented to demonstrate the application of the proposed approach.     

Mission reliability evaluation based on operational quality data for multistate manufacturing systems

Modern and intelligent manufacturing systems have a prominent multistate feature. However, previous studies of reliability analysis of multistate manufacturing systems mostly focused on the basic reliability of manufacturing systems but disregarded their operating characteristics, which has hindered the development of Prognostics and Health Management technique for intelligent manufacturing systems. Therefore, an evaluation approach of mission reliability for multistate manufacturing systems based on operational quality data is proposed in this paper. First, from the systematic viewpoint of the composition and operational principle of the manufacturing system, the relationship among production task execution state, production equipment degradation state, and produced product quality state is expounded, and the connotation of the mission reliability of multistate manufacturing systems is defined. Second, an extended state task network (ESTN) is presented to organise operational quality data by considering the quality state of work in process (WIP). Third, a fusion model of operational quality data for manufacturing systems is established with the aid of the ESTN, and an operational quality data-oriented evaluation method of mission reliability is been put forward. Finally, a case study of a manufacturing system for a cylinder head is conducted to verify the proposed approach.