一类新型自动洗碗机的设计

设计一种由分碗系统、刷碗系统、翻碗系统、清洗系统、自适应刷头和高温干燥系统组成的新型自动洗碗机。该洗碗机的特点是用水少、去污能力强、操作简单、适应性强、刷头具有自洗功能,具有广泛的市场发展前景。     

基于太阳光源的车载被动DOAS系统的研制

研制基于太阳光源的车载被动差分光学吸收光谱(DOAS)系统在大气质量监测领域具有重要的意义。在分析该系统功能需求的基础上,提出该系统的总体设计思想和技术实现途径。系统通过在汽车上安装GPS模块和小型化的固定式被动DOAS系统完成硬件设计,采用C++ Builder 6.0语言编写具有自主知识产权的应用软件。外场实验表明,该系统操作方便、性能可靠,具有较好的应用推广前景。     

液压系统的维修性设计

液压系统是结构复杂且精密度高的机、电、液综合系统,其故障具有隐蔽性、交错性、随机性、差异性等特点,本文分析了影响液压系统维修性的主要因素,并从简化设计、可达性、标准化、模块化、测试诊断性等五个方面对如何提高系统的维修性水平进行了阐述,对于液压系统的维修性设计具有指导意义。     

基于LabVIEW的综合录井多参数曲线监测系统设计

多参数曲线监测系统是综合录井采集系统的一个子系统。本系统利用LabVIEW完成多钻井工程参数曲线实时监测系统设计代替传统曲线监测系统,具有工程参数采集、实时参数显示、实时存储、数据处理及回放、打印等功能。具有使用灵活、可移植性好与性价比高等优点。     

闭环步进驱动系统的最少拍控制

提出了步进驱动系统的最少拍闭环控制方法,开发出基于该方法的新型闭环步进位置控制系统。该系统既具有全闭环系统的控制精度,又具有开环系统的稳定性,并且具有很广的适用范围,可对多种类型的数控机床实现以低成本、高精度、高稳定性和优良的动态性能为特征的全闭环位置控制。该系统已在数十台国产数控机床上进行了应用,在复杂精密零件加工方面取得良好效果。     

自主版权通用机构分析与仿真系统的研制

:介绍了具有自主版权的机构分析与仿真系统 (GMECH)的功能、设计原理及应用实例。该系统是一个通用的机构建模、运动学分析、实体运动仿真和实体干涉检查系统 ,它适用于具有任意拓扑结构的机构。目前 ,它具有运动学正解、反解和准动力学分析的能力     

基于ARM的机器人视觉导航系统的设计

在机器视觉与嵌入式系统的交叉点选题,试图将机器视觉与嵌入式系统结合起来,在开发基于ARM的机器视觉系统方面进行一些探索,以拓展机器视觉的应用范围。设计了相应的硬件系统和软件系统。在系统的设计和实现过程中,采用了模块化的思想,具有良好的开放性,有利于功能扩展和系统升级。实验结果表明,设计的软、硬件系统性能稳定,具有一定的通用性。     

基于Internet功能的网络传感器系统的设计

提出了一种基于ARM嵌入式系统的具有Internet功能的网络传感器系统的设计方案。项目的开发可以实现工业气体检测传感器的Internet功能和集中远程控制。用户可以直接通过Internet网络对工业现场的气体检测报警系统进行浏览、查询和控制。系统具有运行稳定可靠等特点。     

基于DPSD算法的交流电磁场检测系统的研制

文中以FPGA为核心设计基于DPSD算法的ACFM检测系统，实现对检测信号自适应滤波，提取幅值的功能。系统由探头、前端处理电路、FPGA、上位机软件组成，并基于FPGA设计DDS激励源。以不锈钢板为测试对象设计试验，验证系统性能。结果表明：系统针对微小裂纹具有良好的检出效果，且在系统稳定性、集成性及灵活性方面具有很好性能。     

基于网络的数控加工表面质量预测系统的研究

提出了一种基于网络的数控加工表面质量预测系统的系统构架,该系统具有响应速度快、成本低、安全性好等特点。     

直流电机位置伺服系统设计

以机械臂的驱动电机为研究对象,采用廉价的旋转电位器作为位置传感器,设计了基于单片机的直流电机位置闭环控制系统。首先,研究了直流电机的位置控制原理和实现方法,并提出了适用于该系统的力矩控制方式。然后,从设计指标出发,计算了电机的负载,选择了执行电机,并设计了系统的硬件电路和相应的控制程序。最后,重点对系统调试过程中出现的非线性问题进行了研究,针对机械产生的非线性问题提出了改进方案和补偿的方法,并应用到了系统实际设计中。成功实现了直流电动机在空载、负载这两种不同状态下的位置控制。     

基于有限元法的挖掘机回转平台的力学分析

针对挖掘机回转平台结构特殊、受力复杂的特点,采用有限元法建立了力学计算模型,并分析了两种不同铺板宽度下平台在强度和刚度上的差异表现,提出了设计改进意见和策略,为挖掘机回转平台的结构及尺度设计提供了有益的参考。     

Vehicle tests of a longitudinal control law for application to stop-and-go cruise control

This paper presents the implementation and vehicle tests of a vehicle longitudinal control scheme for Stop and Go cruise control. The control scheme consists of a vehicle-to-vehicle distance control algorithm and throttle/brake control algorithm for acceleration tracking. The desired acceleration of a vehicle for vehicle-to-vehicle distance control has been designed using Linear Quadratic optimal control theory. Performance of the control algorithm has been investigated via vehicle tests. A millimeter wave radar sensor has been used for distance measurement. A stepper motor and an electronic vacuum booster have been used for throttle/ brake actuators, respectively. It has been shown that the proposed control algorithm can provide satisfactory performance.     

Operation of a model of a normal ultrasonic transducer for immersion and conventional inspection techniques

An experimental and theoretical study of the operation of a model of a normal ultrasonic transducer for various acoustic loads has been performed. It has been established that, in the design of the transducer under study, a relatively thick adhesive layer between the piezoelectric plate and the wear plate abruptly reduces the operating (effective) signal frequency in the case of an immersion load. An equation for estimating the effective frequency for a transducer model has been obtained with allowance for the characteristics of such a layer.     

Wide Large Two-way Curing Press for Conveyor Belt

Shanghai Disheng Company has launched a new curing press which has original four sides of cold steel opening and can be two-way pressed. The positive window is 4200mm width and the 3900mm width of special filter belt and the conveyor belt with profiled surface flanging for power factory and mine can be pressed. The side window is lO00mm width and the synchronous belt andnormal belt below 1000mm width can be pressed. The 2700mm width sample machine with the same structure has been used for nearly three years in the factory of the company and has got good performance. The substantial improvement of the machine has been made on the original foundation and has met the design requirements. Currently, the press has been in regular production for 3 months, dozens of wide vacuum filter belts, synchronous belt and flat belt pressed have taken into normal use. This curing press for the conveyor belt solved the problems of high cost, high tonnage, dif- ficult to make, low accuracy, difficult for transportation, the cycle of installation and testing is long and occupy large areas and high vacancy rate. It is specially suitable for the small and me- dium rubber factory with small workshop, large varieties of products and small batch production. It creates a new design idea for curing press of the wide conveyor belt. This machine has high input-output ratio and is a new type of economic curing press.     

Complete modeling and parameter optimization for virtual ring rolling

Virtual manufacturing, usually consisting of complete modeling and optimization, of a manufacturing process has recently become one of the research trends in the area of process designing and selection. With the aim to realize complete modeling of a ring rolling process, a complex actuation mechanism model of a heavy radial-axial ring rolling machine has been established in this study. Moreover, a self-modified computer program for controlling the real-time movements of two guide rollers and two conical rollers in a ring rolling process has been developed. An optimization objective function has been proposed for saving the rolling time, in which the slip rate is regarded as the state variable. With this function, the virtual ring rolling process for producing a titanium alloy ring with a rectangular section has been successfully conducted using the finite element method. The simulation results are in good agreement with the experimental findings. Thus, the feasibility of the proposed method has been demonstrated. The computational result also reveals that the proposed optimization method can reduce the rolling time by about 28%.     

Sliding wear rig

As a preliminary to studies on cam and follower systems, a rotating cylinder on reciprocating flat wear rig has been developed. This has turned out to possess a number of useful characteristics not available in more conventional rigs. The rig has been particularly useful in that it has produced wear areas large enough for detailed comparison of a range of quantitative surface analysis methods. Esca, sem/empa, sem/edax have been compared for the quantification of antiwear surface elements.     

Closed-form solution of axisymmetric contact problem for a viscoelastic base within cycle of increasing and decreasing of load on the indenter

The axisymmetric contact problem for a spherical indenter and viscoelastic base has been considered within a cycle of increasing and decreasing of load. The loading-unloading cycle has been performed at a constant speed of indenter movment. The quasi-static approximation has been used. The study has been carried out according to linear viscoelasticity theory, while the material model allows one to take into account an arbitrary number of relaxation times. The dependence of load on the indenter on time has been defined. Expressions for determining the unknown boundary of the contact area in the loading–unloading process has been given. The hysteretic loop area at different values of the material relaxation time has been analyzed. The applicability of the offered analytical model of elastomer indentation experiments data processing has been discussed.     

Thermostressed state of a pad–disk tribosystem during single braking

The temperature and stress distributions in a disk under single braking have been studied. The finite-element method (FEM) has been used to obtain a numerical solution to the heat-conduction boundary problem for a steadily decelerated rotating disk heated in a local area of the working surface by a frictional heat flow. Given the temperature field, the finite-element method has been used to solve the corresponding quasistatic thermoelasticity boundary problem. The elastostatic boundary problem has been numerically solved separately for a disk loaded with distributed normal and shear stresses in the contact area. The complete field of stresses in the disk has been determined by adding up elastic and thermoelastic components. Numerical analysis has been performed for a cerametallic (FMC-11) pad—cast-iron (ChNMKh) disk friction couple.     

Integrated design and manufacturing ultilising a personal computer: A woodworking-industry application

An integrated design and automated manufacturing system for making cabinet doors has been developed and implemented. A standard CAD package is used for designing the components and a CAM system, consisting of a modified industrial woodshaper and additional motion-control hardware, produces the components. A software environment has been developed to integrate both design and manufacturing functions. The system has been shown to reduce the time for designing and manufacturing a single door by a factor of four.