用于滑油中碎屑在线监测的电容传感器设计与实现

设计了可集成于滑油管道的同轴电容传感器,可用于原位检测滑油中碎屑从而诊断航空发动机健康状态。建立同轴电容传感器的数学模型,采用数值仿真方法对电容传感器相关参数进行分析。结果表明:圆筒式电容传感器的电容值随碎屑数量的增加而增大,且大致呈现线性关系,随碎屑尺寸的增加而增大,且有较好的线性关系。确定合适的传感器设计参数,搭建试验台对同轴电容传感器进行初步实验验证,试验结果表明同轴电容传感器具有可行性。中央高校基本科研业务费项目(20720180120

The Development of a New Type of Medical Rehabilitation Brace for Lower Limbs

本文阐述了一种新型医用下肢康复支具的研制过程。该装置主要由承重装置、负重装置、负重调节装置以及压力检测装置等结构组成,具有调节、设定以及控制负重载荷等功能,可使行内固定术后的下肢骨折患者早期进行负重、行走功能锻炼,促进其骨折愈合及肢体功能康复,减少术后并发症,具有一定的实用价值。The paper expounded the development of a new type of medical rehabilitation brace for lower limbs. The device was mainly composed of different structures including the hip weight-bearing device, the foot weight-bearing device, the weight-bearing adjustment device and the pressure detection device. The brace was designed to allow patients to carry out weight-bearing exercises and walking exercises in early postoperative period after receiving internal fixation of lower limb fracture. It could also promote fracture healing and functional recovery of lower limbs and reduce postoperative complications, which is of certain clinical value

Surface-enhanced Raman Spectroscopic Study of Gold Nanoparticles with Different Shapes

【中文文摘】使用514 5nm激光激发,第一次得到了不同形状金纳米粒子的表面增强拉曼光谱(SERS)。一般情况下,较短波长(600nm)的激发。然而,对特殊形状的自组装金纳米粒子,由于避雷针效应,即使使用绿光激发也可获得很高增强的SERS。 【英文文摘】In this communication, we obtained for the first time the SERS spectra of gold at the laser excitation of 514.5 nm by fabricating the ordered array of gold nanoparticles with special shapes, e.g., sphere, tadpole, and pearlchain. Selfassemble method of these gold nanoparticles is briefly introduced. In general, the enhancement of gold by the laser excitation of short wavelength (600 nm) becuase that the coupling between conduction electrons and interband electronic transitions by using 514. 5 nm depresses the quality of the surface plasmon resonance of gold metals considerably. Our observation reveals that the SERS of self2assembly gold nanoparticles with special shape can be rather high even using the green light excitation , which is mainly due to the lightning2rod effect.国家自然科学基金创新群体研究资助项目(20021002);; 国家自然科学基金九五重点项目(29833060

一种考虑物性参数温变影响的齿轮传动温升计算方法

高速重载齿轮啮合传动因摩擦生热导致温升，齿轮从而产生热膨胀引起啮合误差，使得振动、噪声增大，胶合失效加剧。因此，对齿轮传动进行温升计算与影响因素分析具有重要意义。温升导致齿轮热物性参数变化，影响温度场，若忽略这种影响，将产生误差。基于渐开线直齿轮，根据齿轮啮合理论和摩擦传热原理，对齿轮传动中瞬时摩擦热流量和对流换热系数进行求解。利用CALPHAD法得出不同温度下的物性参数，基于ANSYS热固耦合法，利用APDL编写变物性参数程序，对齿轮传动温升进行计算，得出齿轮传动中温度场变化情况。编写参数化求解程序，分析齿宽和转矩对啮合传动温升的影响。该研究为分析温升对齿轮失效影响机理奠定重要基础，具有一定的指导意义

偏振编码中光信号的偏振信息获取方法

为了解决非线性效应与偏振模色散问题所引起的巨大功率代价,对基于偏振的编码技术进行了研究。提出了一种基于三弹光互差频偏振调制的偏振信息获取方法,该方法克服了现有方法无法用阵列探测器实行有效采集及调制频率高等缺点;给出了MATLAB仿真及实验验证结果,证明了该方法在理论及实际中的可行性

一种高层建筑全方位自适应爬楼梯运输机器人

本发明涉及机械自动化机器人，具体地说是一种高层建筑全方位自适应爬楼梯运输机器人，左前、右后麦轮驱动机构结构相同，右前、左后轮履复合驱动机构结构相同，对角线安装于车体两侧，带动机器人整体移动；机器人车体前端的两侧对称设有前摆臂机构，两侧前摆臂机构通过安装在机器人车体内的前摆臂驱动机构同步转动；机器人车体后端的两侧对称设有后摆臂机构，两侧后摆臂机构通过安装在机器人车体内的后摆臂驱动机构同步转动；机器人通过前后摆臂的转动可以实现履带型、全向轮型和腿型三种运动模式的转换。本发明可以应用于高层建筑楼梯环境的物资运输，不受狭小空间限制全方位行走，自适应攀爬楼梯，具有运动灵活、适应性广泛、结构紧凑等特点

火箭发动机喷管与燃烧室柔顺对接方法

本发明提供一种火箭发动机喷管与燃烧室柔顺对接方法，通过六自由度并联平台按预设的运动路径控制火箭发动机喷管运动至与火箭发动机燃烧室发生接触；记录六维力传感器返回的数据、火箭发动机喷管的位置姿态并测量记录碰撞点坐标，形成训练数据集；通过训练数据集训练神经网络模型，并通过狼群算法优化深度学习模型的预测数据集，提高对碰撞预测点的定位精度；根据六维力传感器解算碰撞点处受力情况；根据当前受力情况、模型预测受力情况以及当前火箭发动机喷管的位姿和碰撞点，通过柔顺控制数学模型解算出下一时间点的火箭发动机喷管的预期位姿；运用深度强化学习算法在线学习柔顺控制数学模型中的超参数，提高对接效果

Pneumatic-piezoelectric hybrid vibration suppression for a flexible translating beam using adaptive fuzzy sliding mode control algorithm

A translating flexible beam system driven by a rodless cylinder using a proportional valve is proposed. Active vibration control of the flexible beam is developed by using a pneumatic cylinder and a surface-bonded piezoelectric actuator. The experimental test bed constitutes a pneumatic circuit, piezoelectric control system, and corresponding interface circuits. Then, a proportional derivative (PD) controller and an adaptive fuzzy sliding mode control (AFSMC) algorithm are designed and applied to vibration control of the experimental system. Experiments are conducted for set-point residual vibration suppression and resonant vibration control under the excitation of the first mode. The experimental results indicate that the designed controllers can increase the damping of the system to damp out the residual vibration and minimize certain resonant responses

机器人给氧装置

本实用新型涉及废墟救援设备，具体地说是一种机器人给氧装置，给氧装置底座固定于机器人上，位姿固定座及电压控制器分别安装于给氧装置底座上，软体关节为多个，通过关节连接件串联连接，最前端的软体关节安装于位姿固定座上，末端的软体关节上安装有末端输出管，各软体关节分别与电压控制器相连；给氧机构包括输氧软管、储氧罐、输氧阀及动力源，储氧罐及动力源分别安装于给氧装置底座上，动力源的输出端与输氧阀相连，输氧阀的一侧与储氧罐连通，另一侧与输氧软管的一端连接，输氧软管贯穿于各软体关节，另一端通过末端输出管紧固。本实用新型具有结构轻量化、模块化、给氧精度高，易于安装、更换、操控精准的特点

Dynamic Modeling and Characteristic Analysis of Proton Exchange Membrane Fuel Cell

通过分析质子交换膜燃料电池电压的影响因素，利用理想气体状态方程的微分形式求得氢气和氧气分压，并且结合热力学电动势及燃料电池的各种损耗，建立PEMFC的动态模型。通过对参数进行合理设定，得到PEMFC的稳态模型，其仿真结果与实验结果有较好的吻合，表明所建立模型的正确性、可操作性和有效性。利用建立的动态模型分析在载荷突变的情况下，输出电压和氢气分压的动态响应特性，从而达到准确模拟实际燃料电池系统的工作性能，评价预测燃料电池的承载能力和指导燃料电池堆操作的目的。In this paper, a dynamic model of PEMFC is developed to estimate the dynamic performance of PEMFC by analyzing in detail the influence factors of voltage of PEMFC including various losses. The partial pressure of hydrogen and oxygen is obtained using the differential form of the ideal-gas equation in this model. The steady-state model is obtained by setting reasonable parameter values. The simulation results and experimental results have good consistency, which shows that the simulation model is correct, reasonable and effective. It analyzed the dynamic response characteristics of the output voltage and the partial pressure of hydrogen in condition of load mutations using the simulation mode in this paper. The dynamic model of PEMFC proposed in this paper can accurately simulates the performance of practical fuel cell system, evaluate the load capacity of fuel cell and have guiding significance for the fuel cell operation.作者联系地址：1.西南交通大学新型驱动技术中心,成都,60031；2.重庆理工大学重庆汽车学院, 重庆,400050;3. 淡马锡理工学院工程学院,新加坡,529757Author's Address: 1. New Drive Technology Center, Southwest Jiaotong University, Chengdu 610031, China; 2. Chongqing Automobile college, Chongqing University of Technology,Chongqing, 400054,China; 3.School of Engineering, Temasek Polytechnic, Singapore 529757,Singapore通讯作者E-mail：[email protected]