多孔组生成中心虚圆直径的程序测量与求解

推荐一种在微机型万工显上,运用CAT软件"几何测量"处理功能,测量多孔组生成中心虚圆直径的精确、简便方法。     

Monocular-vision-based method for online measurement of pose parameters of weld stud

With the rapid development of stud welding technology, weld studs are extensively used in automobile industry. A weld stud differs from a regular stud in that it has special external features. This study develops a novel non-contact, fast, and high-precision method based on monocular vision for measuring the position and attitude parameters of a weld stud. Under this method, the measuring principle for the weld stud’s position and attitude parameters is derived and an accurate mathematical model is set up. Based on this mathematical model, a precise calibration method for the projective transformation’s corresponding relationship parameters is developed and an optimal observation condition is then introduced as the constraint into the measurement process so as to enhance the location precision. The experiment results show that the proposed method is fast and accurate, and it satisfies the requirement of online, flexible, fast, and high-precision measurement of weld studs’ pose parameters in automobile and other manufacturing industries.     

基于Smith预估补偿的模糊PID减温器控制系统仿真

针对火电厂控制水蒸汽温度的减温器滞后时间较长和常规PID控制效果的局限性等问题,使用了一种基于Smith预估补偿的模糊PID控制策略,以提高减温器的调节性能,利用MATLAB软件对其进行了仿真测试,对测试结果进行了分析讨论。     

TOOL PATH SELECTION STRATEGIES FOR COMPLEX SCULPTURED SURFACE MACHINING

High performance machining of complex free form surfaces is very critical in many different industries. In this research, an advanced mathematical model of cutting forces that is based on the kinematics and mechanics of the 3D sculptured surface machining is integrated with CAM packages in order to predict the complex tool-workpiece engagements and machining forces for any tool path. Machined 3D free form topographies and distributions of errors between the desired CAD and machined surfaces are also predicted in advance. Now, an evaluation of different tool path strategies for 3D complex sculptured surfaces can be made. Theoretical simulations of forces and surface topographies for different tool paths are presented and compared with experimental measurements.     

汽车电动助力转向系统的建模与仿真

本文分析了动力转向系统的发展概况和国内外研究及应用水平,建立了电动助力转向系统的数学模型,利用有关软件进行计算机仿真分析并与试验结果相比较,验证了模型的正确性。     

复杂环境下作业四足式机器人外形结构设计研究

复杂环境下机器人的外形结构对保护其核心控制系统非常关键,为此提出一种新的外形结构设计理念及方法,包括基于可调配重系统的结构创新设计使机器人在运行中保持主动机械平衡、模拟极限环境长时间水浸试验选择最优材料、基于3dsMAX的仿生建模,提出建立在产品美学要求基础上的计算机仿真、评价、修改体系。通过该原型机实际制造结果说明设计理念及方法可为同类型机器人相关研究提供参考。     

Numerical comparison of sampling strategies for BRDF data manifolds

The bidirectional reflectance distribution function (BRDF) is one of the fundamental concepts in such diverse fields as multidimensional reflectometry, computer graphics and computer vision. BRDF manifolds form an infinite-dimensional space, but typically the available measurements are very scarce. Therefore, an efficient learning strategy is crucial when performing the measurements.In this paper, we perform simulation studies within a mathematical framework that allows to establish more efficient BRDF sampling and measurement strategies in the sense of statistical design of experiments and generalized proactive learning. Our simulation studies suggest that the default BRDF measurement strategy is suboptimal for a wide class of loss functions.     

填料型饱和热水塔数学模拟

本文对填料型饱和热水塔最佳工况模拟,对该类型塔的计算机数学模拟进行了讨论。     

基于计算机辅助制图的机械制图实践环节设计与实践

＂机械制图测绘＂是机械类专业的重要的基础性实践教学环节,对培养学生增强工程意识、激发专业兴趣、培养综合能力等方面具有重要意义。在＂机械制图测绘＂中引进计算机辅助制图,是提高学生工程素质的重要环节。     

汽车悬架弹簧的CAE研究

根据国内某汽车生产厂对悬架弹簧提出的设计要求,对悬架弹簧的结构设计、材料选择、结构CAE(Computer Aided Engineering)分析进行研究,给出了F1-XXX车型弹簧结构的优化参数、选材,并且对结构进行仿真的CAE分析,表明选用55CrSi油淬火回火钢丝能满足该车型用簧的疲劳强度要求.