黄鹤古楼下,名酒再飘香--"黄鹤楼"酒10年后"重出江湖"

“黄鹤楼”酒10年后“重出江湖”。“黄鹤楼”酒旧称“汉汾”,史栽为康熙元年夏口人刘氏所创。而今。面貌一新的“黄鹤楼”酒被注入了全新活力。全新上市的“黄鹤楼”系列酒将主要定位于中高档白酒市场,让“黄鹤楼”品牌重现风采、再铸辉煌!     

基于多体理论的数控双盘铣刀加工斜齿轮啮合分析

以多体系统理论为基础,根据数控铣齿机运动原理,建立了包含误差因素在内的数控双盘铣刀加工斜齿轮啮合模型,推导出被加工齿轮的螺旋面方程.分析结果表明,采用双盘铣刀加工的方法,可以减少齿廓余量,改善齿廓余量的不均匀性.     

Self-Adaptive Control System for Additive Manufacturing Using Double Electrode Micro Plasma Arc Welding

Wire arc additive manufacturing(WAAM)has been investigated to deposit large-scale metal parts due to its high deposition efficiency and low material cost.However,in the process of automatically manufacturing the high-quality metal parts by WAAM,several problems about the heat build-up,the deposit-path optimization,and the stability of the process parameters need to be well addressed.To overcome these issues,a new WAAM method based on the double electrode micro plasma arc welding(DE-MPAW)was designed.The circuit principles of different metal-transfer models in the DE-MPAW deposition process were analyzed theoretically.The effects between the parameters,wire feed rate and torch stand-off distance,in the process of WAAM were investigated experimentally.In addition,a real-time DE-MPAW control system was developed to optimize and stabilize the deposition process by self-adaptively changing the wire feed rate and torch stand-off distance.Finally,a series of tests were performed to evaluate the con-trol system's performance.The results show that the capability against interferences in the process of WAAM has been enhanced by this self-adaptive adjustment system.Further,the deposition paths about the metal part's layer heights in WAAM are simplified.Finally,the appearance of the WAAM-deposited metal layers is also improved with the use of the control system.     

无线设备状态监测网络轴承故障信号的采集

本文利用双端口RAM芯片,以环行FIFO队列的存储方式,构建基于PC104ISA总线的高速数据采集卡。PC104可通过该卡对轴承的故障信号进行高速采集、计算,并将故障分析结果通过无线网络发送到远程PC机。     

PLC控制系统双机热备及可靠性设计与实现

可编程序控制器(PLC)是专门为工业生产环境设计的控制装置。总结了PLC控制系统的设计原则、内容、步骤和方法，并探讨了PLC双机热备用设计及可靠性设计方面要考虑的主要问题，结合工程设计经验提出可行的解决办法。     

砂轮切割机Y轴步进电动机掉电故障排除

砂轮切割机Y轴步进电动机工作中偶发掉电故障,先检查设备软件中Y轴方向的运动参数,再检查与步进电动机相连接的机械部件,步进电动机的各电气回路,供电直流电源,最终找到并排除故障.     

兆瓦级风电机组抗台风塔架设计的初步研究

根据某风电场台风的特点确定风机设计等级,在此基础上通过对塔架基本尺寸的预假设并建立基本物理模型,基于有限元法并根据风电设备的设计规范对抗台风风力发电机组塔架的主体塔筒进行了初步分析,主要包括塔架的低级频率和极限强度计算。通过对该风电机组初步设计中的塔架的基本设计工作初步确定该的塔架的固有频率和极限强度均满足风电机组的设计规范要求。然而建议在对抗台风风力发电机组塔架详细设计阶段必须进行进一步优化设计在强调足够的情况下减小尺寸,降低制造和运输成本。     

基于双压驱动的恒流斩波系统的设计

恒流斩波电路中，步进电机的驱动电压高，绕组回路阻抗低，电流上升较快。单一的恒流驱动电路在低频时绕组电流上升过快，容易导致低频过冲振荡现象。为避免振荡，本文采用双压驱动与恒流斩波驱动相结合：低速运行时采用低电压供电，低频过冲振荡小，转动平稳；高速运行时采用高电压供电，高频输出扭矩大，不易堵转。     

Improving bonding strength of tape-automated bonding technology by implementing statistical process control: a case study

The purpose of this paper is to improve the bonding strength of tape-automated bonding (TAB) technology in supertwisted nematic liquid crystal display (STN LCD) module manufacturing by double-process control. First, the quality characteristic – the output of the process – is monitored by control charts and the variation of the process is reduced. Later, it is found that the quality characteristic is affected by critical input process parameters. These critical input process parameters and the quality characteristic are therefore monitored simultaneously. By this double-process control, the deviation of the process is further reduced. The results show that process capability and yield rate are increased.     

Modeling of a hybrid passive damping system

The modeling of a hybrid passive damping system is presented for suppressing the multiple vibration modes of beams in this paper. This hybrid passive damping system consists of a constrained layer damping and a resonant shunt circuit. In a passive mechanical constrained layer damping, a viscoelastic layer, which is sandwiched between a host structure and a cover layer, is used to suppress vibration amplitudes in the high frequency range. A passive electrical damping is designed for targeting the vibration amplitude in the low frequency range. The governing equations of motion of the hybrid passive damping system are derived through the Hamilton's principle. The obtained mathematical model is validated experimentally. The theoretical and experimental techniques presented provide an invaluable tool in controlling the multiple vibration modes across a wide frequency band.