本文借鉴在一般制造产品信息描述上的已有成果,对 SMA(Surface Mount Assemblies)产品信息的描述技术进行研究,针对 SMA 产品信息所具有的特点,寻求一种可以满足实际应用,并使其能贯穿产品研制、生产、使用和维护等产品寿命全周期的信...本文借鉴在一般制造产品信息描述上的已有成果,对 SMA(Surface Mount Assemblies)产品信息的描述技术进行研究,针对 SMA 产品信息所具有的特点,寻求一种可以满足实际应用,并使其能贯穿产品研制、生产、使用和维护等产品寿命全周期的信息描述、传递、运算、控制、存储整个过程之中的解决方案。本文给出该方案的概念、实现方法和信息描述系统的演示性原型。展开更多
On the basis of welding transformer circuit model, a new measuring method was proposed. This method measures the peak angle of the welding current, and then calculates the dynamic power factor in each half-wave. An ar...On the basis of welding transformer circuit model, a new measuring method was proposed. This method measures the peak angle of the welding current, and then calculates the dynamic power factor in each half-wave. An artificial neural network is trained and used to generate simulation data for the analytical solution, i.e. a high-order binary polynomial, which can be easily adopted to calculate the power factor online. The tailored sensing and computing system ensures that the method possesses a real-time computational capacity and satisfying accuracy. A DSP-based resistance spot welding monitoring system was developed to perform ANN computation. The experimental results suggest that this measuring method is feasible.展开更多
文摘本文借鉴在一般制造产品信息描述上的已有成果,对 SMA(Surface Mount Assemblies)产品信息的描述技术进行研究,针对 SMA 产品信息所具有的特点,寻求一种可以满足实际应用,并使其能贯穿产品研制、生产、使用和维护等产品寿命全周期的信息描述、传递、运算、控制、存储整个过程之中的解决方案。本文给出该方案的概念、实现方法和信息描述系统的演示性原型。
基金The National Natural Science Foundation of China (No 50575145)
文摘On the basis of welding transformer circuit model, a new measuring method was proposed. This method measures the peak angle of the welding current, and then calculates the dynamic power factor in each half-wave. An artificial neural network is trained and used to generate simulation data for the analytical solution, i.e. a high-order binary polynomial, which can be easily adopted to calculate the power factor online. The tailored sensing and computing system ensures that the method possesses a real-time computational capacity and satisfying accuracy. A DSP-based resistance spot welding monitoring system was developed to perform ANN computation. The experimental results suggest that this measuring method is feasible.
