紧密纺纱气动凝聚结构的研究

分析紧密纺柔性和刚性凝聚元件的气动凝聚结构特征以及气动垂直凝聚形式存在的凝聚效能低、投资和运行成本高等弊端。根据优化凝聚结构、提高凝聚效能的设计构思,提出了一种适用性和经济性优良的气动侧向凝聚创新结构,指出该结构具有科学合理,无磨损、不易堵塞,运行维护成本低、品质变异小等特点。     

Experimental study on a single particle trap with a pneumatic vibrator matrix

This paper describes a fundamental study on a pneumatic particle trap with a vibrator matrix. The particle trap device consisted of pneumatic vibrators and a trap chamber used to trap a particle. The entire structure was fabricated from polydimethylsiloxane (PDMS). The particle in the trap chamber was manipulated and trapped in the equilibrium region by exploiting the geometrical symmetry of the vibrators. The x-axial velocity of the viscous fluid induced by the deformation of the flexible diaphragms was eliminated or minimized at the center of two vibrators. Therefore, a particle could be trapped in the central capturing region by two or four vibrators. The trapping of static and dynamic single particles was observed to verify the proposed operational method.     

Experimental investigation of mixing-enhanced swirl flows

The experimental objective was to compare disintegration characteristics from the internal mixing pneumatic nozzles under the different operating conditions in terms of swirl angles. For this investigation, supplied air pressures and nozzle configuration ratios were fixed. This experimental comparison is of fundamental importance to the understanding and modeling of turbulent atomization because the axisymmetric swirling flows involve relatively complex interactions. For the measurement, four internal swirl mixing nozzles with axisymmetric holes at swirl angles of 15°, 30°, 45°, and 60° to the central axis were employed, which is responsible for the enhancement of mixing in pneumatic jets. To illustrate the swirl phenomena quantitatively, the distributions of mean velocities, turbulence intensities, and SMD (Sauter mean diameter, or D₃₂) variations with different configuration ratio were comparatively analyzed. It indicated that the atomization characteristics are performed well in the case of 30° of swirl angle, and that turbulence intensities are gradually degenerated with the increase of radial distances, showing a slight increment of SMD at downstream region. In particular, measurements showed that nozzle configuration is one of the significant geometrical parameters affecting the spray trajectories. This paper was recommended for publication in revised form by Associate Editor Jun Sang Park     

气液联控伺服系统的动力机构特性分析

首次提出一种新型传动方式，描述了此类传动的基本结构和工作原理，给出了相应的数学模型，并详细分析了系统的动力机构特性。提出了用气液联控伺服系统可以实现常规气压伺服系统难以实现的高频响、高刚度等一系列特殊机能，可望为非线性严重的难以控制的气压伺服系统寻求一条控制的新途径。     

脊椎治疗床的气动牵引力控制系统

随着气动技术的日益成熟，为气动技术开辟新的应用领域已成为业内人士的重要工作内容之一。本文结合脊椎治疗床这一开发实例说明气动技术在医疗设备上的应用，并详细阐述了气动系统的组成，单片机的硬件及软件设计等。     

一种以流动单元体为载体的精密传感器自动

精密传感器自动化装配线的设计采用以流动单元体为载体，转动链条推动单元体运行，并且在装配线站点处设置流动单元体气动阀自动供气接口，用于单元体接气推动治具动作，从而实现对精密细小零件的快速精密定位和装配。利用西门子S7 300PLC的PROFIBUS网络通信模式，设置装配工位、检测工位，实现整个装配过程的自动控制和检测。     

气动打标机回路设计及仿真

气动技术是现今工业领域中的重要组成部分,凭借其成本低、高效率、清洁无污染的优点,得到了愈来愈广泛的应用。全气动控制方法在某些需要防燃、防爆、防静电的特殊场合则完全取代电-气控制。通过Fluid SIM-P软件的气动原理和仿真技术对气动打标机气动回路控制系统进行了设计分析。介绍了打标机的动作原理,采用串级法设计了气动打标机单一循环方式、连续循环方式以及停止切断循环等辅助情况;以及如果料仓中没有工件及时补充,气缸无法启动,系统停止;同时设置了急停按钮,使各气缸立即退回初始位置,且急停可以解除,系统重新开始启动。通过二者有效的结合成功的将模拟仿真后的气动打标机模型应用到了实际生产中,降低了成本,提高了效率,取得了良好的效果。     

基于PLC的气动机械手精准位置控制系统的设计

以气动回路及PLC为控制核心,设计了物料气动机械手;分析了利用步进电机精确位置控制的方法及程序,完成了气动机械手运行系统设计与应用。该系统具有运行稳定可靠、控制简单灵活、精度准确等优点,其应用前景十分广泛。     

基于实验模型的气动人工肌肉位置控制研究

针对目前气动人工肌肉数学模型建模过程较为复杂的问题,提出一种气动人工肌肉的实验模型辨识方法。以气动人工肌肉-质量系统为实验对象,对其输入气压与气动肌肉收缩量之间的关系模型进行实验辨识研究。采用欠阻尼二阶系统来描述气动人工肌肉充气与排气过程的动态响应,并利用实验数据对模型参数进行辨识。最后基于辨识得到的模型进行气动人工肌肉的位置控制,实验结果验证了模型的有效性。     

风动泵技术在飞机系统中的应用浅析

在介绍风动泵技术起源的基础上,进一步分析了风动泵技术的原理、特点及应用,并说明了应用前景以及应用局限。