搜索结果: 1-15 共查到“知识库 机械设计原理与方法”相关记录84条 . 查询时间(1.843 秒)
Fault diagnosis of lithium ion battery using multiple model adaptive estimation
Kalman filter Extended Kalman filter Lithium Ion Fault probabilities
2015/1/12
Lithium ion (Li-ion) batteries have become integral parts of our lives; they are widely used in applications like handheld consumer products, automotive systems, and power tools among others. To extra...
Coupled thermal-fluid analysis with flowpath-cavity interaction in a gas turbine engine
CFD FEA Compressor Engine
2015/1/12
This study seeks to improve the understanding of inlet conditions of a large rotor-stator cavity in a turbofan engine, often referred to as the drive cone cavity (DCC). The inlet flow is better unders...
Three-dimensional image analysis for quantification of tooth movements and landmark changes
Orthodontics Dental Image Tooth Movement Three-dimensional
2015/1/12
Quantification of treatment outcomes (tooth displacement and bony changes) is the key to advance orthodontic research and improve clinical practices. Traditionally, treatment outcome were quantified b...
A Multi-step Reaction Model for Stratified-Charge Combustion in Wave Rotors
Two-Step Reaction Multi-species Model One-Dimensional Euler Equations
2015/1/12
Testing of a wave-rotor constant-volume combustor (WRCVC) showed the viability of the application of wave rotors as a pressure gain combustor. The aero-thermal design of the WRCVC rig had originally b...
针对工矿领域散装物料动态计量存在计量精度低、计量设备运行欠稳定等问题,对动态称重工作原理进行分析研究,设计了一套分体式电子皮带秤作为动态计量设备。设备通过ARM7芯片对物料重量信号和速度信号实施实时采集,并依据动态计量计算公式,实现物料流量的实时计算。设备同时具有标准的4~20mA模拟信号输出接口和RS232通信接口,工厂DCS和本地上位机可以通过上述接口实施设备监控。产品测试和应用表明,该方案...
采用多流管理论模型对风光能源复合发电装置项目中H型垂直轴风机参数进行优化设计,在多流管理论基础上建立模型并用Matlab软件进行计算、仿真。分析了H型垂直轴风力机叶片在旋转过程中不同叶尖速比时攻角的变化情况,以及叶尖速比、密实度对风力机风能利用系数的影响。通过各个参数大小的变化对功率系数的影响进行比较,得出最大功率时所对应的风机最佳参数。
Adjustable Mechanism for Walking Robots with Minimum Number of Actuators
walking robot degree of freedom coupler curve gait
2011/8/5
Recent literature on walking robots deals predominantly with multi-degrees-of-freedom leg mechanisms and machines capable of adopting several gaits. This paper explores the other end of the spectrum s...
高阶椭圆锥齿轮齿形设计与加工
锥齿轮 非圆锥齿轮 范成法 齿面方程
2012/3/1
根据齿轮空间啮合原理,分析了范成法生成高阶椭圆锥齿轮齿廓过程中,范成刀具的空间走刀位置;建立了高阶椭圆锥齿轮齿廓的数学模型,推导出了高阶椭圆锥齿轮的齿面方程,得到了高阶椭圆锥齿轮副的虚拟实体及装配模型;探讨了采用五轴联动数控机床加工高阶椭圆锥齿轮的方法,通过高阶椭圆锥齿轮的加工与啮合试验,对高阶椭圆锥齿轮理论传动比与实际传动比进行了对比分析,验证了范成法生成高阶椭圆锥齿轮齿廓模型的正确性,以及采用...
3-D Free-form Shape Measuring System Using Unconstrained Range Sensor
shape measurement multiple view registration bundle adjustment
2011/8/4
Three-dimensional (3-D) free-form shape measurement, a challenging task pursued by computer vision, is mainly characterized with single view acquisition and multiple view registration. In conventional...
箱型支撑结构加筋板布局设计方法研究
箱型结构 加筋板布局 结构优化 密度法
2012/3/5
针对箱型支撑结构内部加筋板的布局问题,提出了一种基于密度法的高效设计方法。将箱型结构表示为内部布置有平行分布杆的结构,即所谓的纤维模型;采用密度法对承载外壁的材料分布进行优化设计;根据外壁的材料分布情况,确定箱型结构的内部加筋板。引入纤维模型,将三维实体结构拓扑优化设计问题转化为二维板壳结构的拓扑优化问题,计算量小,设计效率高。通过对典型设计实例的设计分析,说明了该方法的有效性。
NN型少齿差行星齿轮传动啮合冲击分析及修形设计
少齿差行星传动 多齿啮合 动态接触 齿廓修形
2012/3/5
针对少齿差行星齿轮传动时的多齿啮合效应,采用有限元法建立了渐开线少齿差多齿啮合模型,分析了动态轮齿的接触特性分析,得到了完整啮合周期内齿面接触应力、齿面印痕、齿面滑动位移等啮合特性参数,分析了啮入、啮出冲击对齿顶刮行的影响。采用长修形法对少齿差行星传动的齿轮进行齿廓修形,使轮齿啮合状况得到了改善,明显减小了啮合冲击对齿顶刮行的影响,研究结果对指导少齿差行星齿轮传动设计具有重要意义。
在两级集成系统协同优化(BLISCO)方法的基础上提出了一种基于近似模型的BLISCO方法,该方法在继承了BLISCO方法优点的同时,具有能够减少设计优化过程中仿真分析和计算次数、平滑设计空间数值噪声、加快收敛速度等优点。通过两个算例,针对子系统存在耦合和不存在耦合两种情况对所提出方法进行了测试,分析结果表明,采用基于近似模型的BLISCO方法可以快速、准确地获得最优解,且综合性能优于原BLICO...
同步控制是LED多线切割机控制系统成功的关键。分析了传统多线切割机切片过程的受力模型,针对其缺陷设计了一种加工罗拉摇摆装置,并给出其模糊迭代同步控制策略。与单一模糊控制方法相比,该策略充分考虑了机器改进后的结构特点和运行过程中的多种干扰,使用PD模糊控制器使系统迅速达到稳定状态并具有一定精度后,再利用迭代学习控制器消除PD模糊控制器的稳态误差。实验对比证明,该算法具有控制精度高、切片质量好的特点。...
Information Coding for Cockpit Human-machine Interface
cockpit design ergonomics information coding eye movement simulator
2011/8/4
identification. At present, related researches are mainly performed in the laboratory, and the experiment method for abstract simulation is often used to research single digit information coding. The ...