摘要：An adaptable product can satisfy different customer requirements by changing its configuration and parameter values during the operation stage. Design of adaptable products aims at reducing the environment impact through replacement of multiple different products with single adaptable ones. Due to the complex architec- ture, multiple functional requirements, and changes of product configurations and parameter values in operation, impact of uncertainties to the functional performance measures needs to be considered in design of adaptable products. In this paper, a robust design approach is introduced to identify the optimal design configuration and parameters of an adaptable product whose functional performance measures are the least sensitive to uncertain- ties. An adaptable product in this paper is modeled by both configurations and parameters. At the configuration level, methods to model different product configuration candi- dates in design and different product configuration states in operation to satisfy design requirements are introduced. At the parameter level, four types of product/operating parameters and relations among these parameters are discussed. A two-level optimization approach is developed to identify the optimal design configuration and its parameter values of the adaptable product. A case study is implemented to illustrate the effectiveness of the newly developed robust adaptable design method.

摘要：发展了一种约束最优控制问题的处理方法,通过引入增广变量,将过程约束转化为终端约束。基于三自由度模型,以迎角、绕速度矢量滚转角和发动机油门系数为优化变量,针对相同的初始条件和两种不同的终端约束,应用文中的方法设计了某战斗机的Herbst机动轨迹,并进行了比较分析。结果表明,该方法快速有效,可以推广应用到机动动作库设计。

摘要：针对传统模块化设计的局限性,将参数化设计和变量化分析技术引入模块化设计,提出广义模块化设计方法,从而拓展模块化设计的应用领域,使其既可适用于系列分级特性比较明显的产品及其产品族的开发,又可满足工况复杂、大载荷,需要进行结构强度、刚度设计,系列分级特性不明显的机械产品的开发设计。对广义模块化设计原理、广义产品平台、基于广义模块组合和基于广义产品平台的产品族规划方法进行系统阐述。最后以液压机广义模块化设计和产品族规划为例,详细说明广义模块化设计的基本原理和方法。

摘要：对电磁振动料斗进行参数化有限元建模,运用有限元分析软件ANSYS对该模型进行动态分析,计算出振动料斗的固有频率和振型、电磁铁吸力、谐响应振幅等,通过电磁场和机械结构的顺序耦合分析,得到最佳的料斗参数。实际应用效果表明,有效缩短了电磁振动料斗的设计和调试周期。

摘要：在汽车制造业中 ,针对生产汽车发动机等关键箱体类零件柔性生产线用计算机辅助技术开发软件系统 ,是目前降低成本 ,节省时间进而提高产品质量的有效途径。本文基于功能的设计方法 ,用面向对象技术对产品中各对象实例进行规范设计 ,用并行设计思想实施应用系统与底层支撑平台分离的独立开发策略 。

摘要：The structure stiffness of presses has great effects on the forming precision of workpieces, especially in near-net or net shape forming. Conventionally the stiffness specification of presses is empirically determined, resulting in poor designs with insufficient or over sufficient stiffness of press structures. In this paper, an approach for the structure design of hydraulic presses is proposed, which is forming-precision-driven and can make presses costeffective by lightweight optimization. The approach consists of five steps:(1)the determination of the press stiffness specification in terms of the forming precision requirement of workpieces;(2)the conceptual design of the press structures according to the stiffness and workspace specifications, and the structure configuration of the press;(3)the prototype design of the press structures by equivalently converting the conceptual design to prototypes;(4)the selection of key structure parameters by sensitivity analysis of the prototype design; and(5)the optimization of the prototype design. The approach is demonstrated and validated through a case study of the structure design of a 100 MN hydraulic press.

摘要：针对推力矢量型垂直/短距起降(V/STOL)飞行的短距降落(SRVL)过程,进行了纵向动力学建模。基于飞机的减速性能与轨迹、速度稳定性,采用可达平衡集方法,构建了策略参数的边界,制定了参数选取标准,设计一种制定短距降落策略的方法。根据降落策略,分段进行了相应的控制框架建立,内环采用动态逆控制律,并引用一种基于频域尺度的效能分配准则进行控制分配设计。基于蒙特卡洛仿真法,对降落策略的鲁棒性进行了仿真验证,结果表明:针对不同降落阶段的策略参数边界制定方法能够满足该阶段的任务需求,且这些参数边界对短距降落策略制定有着明确的参考意义。以L1自适应控制器作为内环增稳控制器,所设计的短距降落策略使得飞行器在着陆过程中有着良好的轨迹鲁棒性。

摘要：针对推力矢量型V/STOL飞行器起降过渡阶段动力系统转换过程存在的控制量耦合与冗余问题,设计了相应的内环增稳控制器和控制分配策略。首先,利用喷射气流效应经验公式建立了带升力损失项的动力系统与飞行动力学模型。然后,采用非线性动态逆方法设计了外环控制律,采用L1自适应控制方法设计了内环控制律,以补偿系统建模误差及参数不确定性的影响。最后,根据控制冗余度,基于效能分配准则设计了控制分配策略,实现了控制解耦,并进行了仿真验证。蒙特卡洛打靶仿真结果表明,即使存在较大参数摄动,控制器仍然可以很好地跟踪参考输入,这说明设计的控制器控制性能与鲁棒性良好。

摘要：介绍了横跨管联箱的组成、壁厚计算及端部结构,并结合具体工程,对支管连接的方法、补强计算等方面进行了探讨。

摘要：用分支分析方法分析了不同构型飞机的深失速特性,用反向积分技术计算了深失速吸引子的吸引域。然后分别用李雅普诺夫方法和滑模反控制方法设计了两种深失速改出控制律,即俯仰振荡控制律与滑模反控制律。通过分析比较,得出了两种控制律之间的内在联系。最后分析了影响深失速改出特性的主要因素。