机械式停车设备充电功能的实现及风险

结合机械式停车设备的类型,介绍停放在带充电功能的机械式停车设备上的电动汽车的几种充电形式、取电器结构及机械式停车设备充电时取电功能的实现.依据不同机械式停车设备特点,推荐不同形式对电动汽车充电的方法.就带充电功能的机械式停车设备存在的潜在风险进行分析.     

微系统领域的关键技术

评述微系统的３维成形、空间运动机构制作和微作业技术。提出了微系统的定义,提出了它区别于宏系统、微电子系统的特点及这些特点对上述３个技术的影响。评述了ＬＩＧＡ、ＤＲＩＥ、ＥＤＭ、微浮雕、折叠法、ＲＰＭ６种３维成形法,并指出如何组合它们以适应激光学系统、微流体系统、微机构等商品化的配套需要。评述了微运动副的制造方法、带弹性变形件及柔性变形件的微机构设计原理和制造方法,并对它们的选择原则提出建议。评述了     

Application of expert systems to manufacturing in Japan

This paper deals with the present status and future trends of expert systems in manufacturing, taking up some representative systems in Japan as examples. The roles of expert systems in manufacturing are first discussed. The present status of research and development of expert systems is summarised taking some typical systems developed and utilised in various manufacturing fields, such as design, process planning, production control, and diagnosis. Finally, important problems to be solved in the future are discussed aiming at utilising the expert systems more efficiently in the manufacturing field.     

Hardware for new methods of radiation control

Designs of the prototypes of two dosimetry systems that are widely used in the modern international practice of the dosimetry of ionizing radiation, in one of which the ability for real-time measurements of radiation field parameters exists, are presented. The nature of optically stimulated luminescence (OSL) and radioluminescence (RL), on which the operation of the systems is based, is described. The results of tests of prototypes of OSL and RL dosimetry systems are given. Key specifications and advantages over traditional thermoluminescent systems are identified for the Korund-101-OSL OSL system prototype.     

BT与HSK工具系统高速加工性能比较分析

通过对BT工具系统和HSK工具系统的结构特点和数字模拟分析比较,从理论上论证了HSK工具系统的高速加工性能优于BT工具系统,并通过实验比较了两者的静、动态性能.     

Analysis of Dynamics and Characteristics of Main Classes of Self-Oscillating Volume-Type Hydraulic Impact Systems

A generalized mathematical model describing self-oscillating volume-type hydroimpact systems of bidirectional and monodirectional direct and back action is presented. Dimensionless variables are introduced, and the main dynamic similarity criteria having a similar physical meaning for these classes of systems are determined. The peculiarities of changes in the output characteristics of the systems (preimpact velocity of the striker, cycle time, and system efficiency) are explained in the space of the basic similarity criteria and are compared. An example of the application of research results to the selection of basic parameters of hydroimpact systems is given, and it can thus be used at a stage of preliminary design.     

对机械设计及其发展的系统学研究

以系统学观点对设计系统进行了描述,提出了设计系统具有分层系统结构,由设计过程系统、设计工具系统及产品物质系统等,构成从产品物质系统到产品技术系统的非线性映照,并建立了系统模型,进而在该模型的基础上,对机械设计各分系统及其发展进行了探讨。     

全景成像技术的现状和进展

全景成像技术在机器人、计算机视觉和虚拟现实领域有着重要的应用。旋转拼接,鱼眼透镜和折反射透镜是实现全景成像技术的主要方法。其中旋转拼接和鱼眼透镜是符合人眼视觉的中心投影法原理,折反射全景成像则是属于环带成像,即柱面映射投影。分析了以上全景成像系统的优缺点,建立了折反射全景成像系统的数学模型。结果表明,折反射系统由于集成化和小型化的特点将会得到更为广泛的应用。     

Evolutionary optimisation of hedging points for unreliable manufacturing systems

The production rates of manufacturing systems are notoriously difficult to control, since such systems are dynamic, uncertain and non-linear. However, the introduction of hedging-point policies for such systems has led to much progress in optimal production control. But the theoretical results so far obtained for such hedging-point policies are still far from complete, since the optimal hedging points (i.e., the optimal inventory levels) are analytically available only for simple systems and under restrictive assumptions. In this paper, an evolutionary stochastic optimisation procedure is proposed to estimate the short-run optimal hedging points for failure-prone manufacturing systems under crisp-logic control. This methodology is illustrated by examples and is validated by comparing the evolutionary results with the available analytical long-run solutions. The proposed evolutionary methodology is also shown to be capable of generating optimal hedging points for unreliable systems producing multiple products with different priorities. In addition, the relative merits of genetic algorithms, evolution strategies and adaptive evolution strategies in hedging-point optimisation are compared.     

Analysis of the number of automated guided vehicles required in flexible manufacturing systems

In this paper we examine some of the general principles and analysis methods that are used to design an automated material handling system. The paper focuses on one type of automated handling system that seems especially suitable for automation in discrete-product manufacturing. These types of automated handling systems are called automated guided vehicle systems. These systems are most applicable for the automation of low-and medium-volume handling situations, where the routeing of materials is more individualised. For guided vehicles, a new quantitative method for analysing these systems is developed in the paper. Examples are presented to demonstrate the method.     

Identification and control of dynamical systems using different architectures of recurrent fuzzy system

Fuzzy logic based systems are very widely used for modeling and control of complex non-linear, plants. Fuzzy systems require the knowledge about the structure of the dynamic plant in order to achieve fruitful results. Recurrent Fuzzy systems (RFS) are a variation of fuzzy systems and have the ability to model and control dynamic plants without using the information about the structure of the plant. This paper presents identification and control of non-linear dynamical systems using two different architectures of recurrent fuzzy system (RFS). It highlights the importance of RFS over the conventional type-1 fuzzy based system. The objective of system identification as well as control has been achieved using both the architectures of RFS and the simulation results clearly show their efficiency. This paper also highlights yet another advantage of RFS over the conventional type-1 fuzzy systems which comes into light when dealing with higher order systems. The paper explains how the computational complexity can be greatly reduced by using RFS for higher order dynamical systems. A comparative analysis between the conventional type-1 fuzzy system and the two recurrent fuzzy systems has also been performed.     

车辆悬架振动控制系统研究的进展

阐述了车辆悬架振动控制系统的基本类型半主动控制和主动控制的理论模型以及几种典型的液力主动控制系统。在综 现有的各种悬架控制方法基础上，着重论述了模糊控制，神经网络控制，模糊神经网络控制等方法在车辆悬架控制系统中的应用。     

微流控芯片发展与展望

介绍了微控分析系统的一般特点,发展历史和近期的研究进展,分别讨论了微流控分析系统中有关流控系统,芯片材料,检测系统,集成化系统,分离系统,试样引入和前处理系统等研究领域的发展趋势,并对微流控分析系统的应用前景做出了展望。     

基于CORBA测量系统通讯语义研究

针对基于CORBA的测量系统，提出了以DMIS作为系统测量数据和指令的内在描述语义，在系统DMIS IDL（Interface Definition Language）接口定义和IDL接口对象实现中按DMIS语义来定义和使用测量系统内的测量信息，解决测量系统内各组成子系统测量信息通讯格式不一致的问题。根据DMIS V2.3的测量过程描述语句，定义和建立DMIS对象、DMIS接口对象和接口实现对象体系；在VC 6.0和VISIBORKER 4.0环境中实现这些对象体系；在实验性的测量系统中应用内含DMIS语义的软件系统以检验这些DMIS语义的通讯性能。     

Economics and success factors of flexible manufacturing systems: The conventional explanation revisited

This article analyzes costs and relative benefits of several hundred flexible manufacturing systems (FMSs) in the world. The analyses are based on the computerized data bases, which make it easy to correlate different cost and benefit indicators with each other and to look for regular patterns and tendencies in the applications. Both investment cost distributions and the system complexity distributions are analyzed. The relative benefits and advantages and their relationships are shown. Finally, technical and economic explanations for successful implementation strategies are given.The results show that there are two classes of economically successful systems. The small-scale and technically compact systems are usually used in small-batch production for the replacement of semimanual production. The main benefits are increased capacity and productivity as well as quality improvements. The large-scale and technically complex systems are used in large-volume production for the replacement of fixed automation and transfer lines. The benefits are mainly due to the increased potential for flexibility and capital savings.     

基本可靠性和任务可靠性模型研究

从分析基本可靠性 (R)和任务可靠性 (RM)的基本概念入手 ,并以某飞机为例 ,分别建立了任务可靠性模型和基本可靠性模型 ,并在假设系统寿命服从指数分布的基础上 ,计算了系统的基本可靠度和任务可靠度     

On Petri net implementation of proactive resilient holistic supply chain networks

Holistic supply chain network (H-SCN) systems are a set of supply chains that have inter-dependence relations. Design and management of H-SCN systems are largely ignored in the literature. Modeling of H-SCN systems will provide a computational facility for design and management of H-SCN systems. A model for disruption of the H-SCN system was proposed by us before, which consists of two parts: a model for disruption of a single firm and a model for propagation of disruption. The present paper mainly discusses how these models can be implemented especially with Petri nets. Guidelines with templates of how the Petri net models for H-SCN systems can be constructed in industrial setting are also given to facilitate the use of our model. Since H-SCN systems are complex network systems, this paper may also contribute to the field of the Petri net technique for network systems modeling in the aspect of reduction of complexity arising from vast amounts of construct instances—a common problem that existed in a Petri net model. Indeed, the proposed Petri net model is suitable for any type of supply chains or supply chain networks.     

Extension of the root-locus method to a certain class of fractional-order systems

In this paper, the well-known root-locus method is developed for the special subset of linear time-invariant systems commonly known as fractional-order systems. Transfer functions of these systems are rational functions with polynomials of rational powers of the Laplace variable s. Such systems are defined on a Riemann surface because of their multi-valued nature. A set of rules for plotting the root loci on the first Riemann sheet is presented. The important features of the classical root-locus method such as asymptotes, roots condition on the real axis and breakaway points are extended to the fractional case. It is also shown that the proposed method can assess the closed-loop stability of fractional-order systems in the presence of a varying gain in the loop. Moreover, the effect of perturbation on the root loci is discussed. Three illustrative examples are presented to confirm the effectiveness of the proposed algorithm.     

The compression of crossed layers of thin tubes

The behaviour of orthogonal layers of aluminium and mild steel tubes under lateral compression is considered. The results for each material are presented separately in Parts I and II of the paper. In all the tests the initial separation of tubes in the same layer is sufficiently large to preclude contact being established between adjacent tubes as they deform.Part I: Aluminium systems are examined and two principal categories of behaviour are identified. As well as providing basic load-deflection data in a suitably non-dimensionalised form, certain particular features of the modes of deformation of individual tubes in the systems are examined in detail.Part II: This presents data and observations concerning mild steel systems. Of especial interest is the difference between the behaviour of as-received tubes, which develop cracks in the regions of greatest deformation, and that of annealed mild steel tubes which show similar characteristics to those of the aluminium systems.     

Analysis of dynamic scene generation schemes in testing of infrared imaging systems

Devices used for testing of infrared imaging systems are briefly reviewed. Popular methods of dynamic scene generation in the infrared range, which are used in testing systems, and their basic parameters are presented. Approximate schemes of constructing such testing systems, based on arrays of controlled micromirrors and emitting elements, are described. A comparative analysis of the most popular testing systems is performed.