基于TMS320F2812的DC600 V客车电源电路板检测台的研制

DG600 V客车电源使用越来越广泛,生产和检修任务繁重.据此设计了基于TMS320F2812的电路板检测台,设计了相关程序,进行PWM脉冲检测,各种故障的模拟,对电路板进行自动检测,检测结果通过显示屏直观的显示.经过测试,该检测台工作稳定可靠,极大的提高了故障诊断的准确性和诊断速度.     

基于TMS320F2812的以太网-CAN网络远程程序下载的实现

以TI公司高速DSP芯片TMS320F2812为例,分析了传统程序下载方式的缺点。详细阐述了通过以太网-CAN网络远程下载程序的硬件需求配置、对上位机软件功能的要求以及实现基于DSP芯片底层代码的方法。实践表明,该方法应用于兆瓦级风电变流器的现场调试和维护具有很强的实用性和典型性,能大大提高嵌入式DSP程序的维护效率。     

矩阵式变换器电流控制空间矢量调制策略

矩阵式变换器是一种新型交-交式直接变换器,它能直接将电能从输入侧送到输出侧。由于没有中间直流环节,输入与输出侧电流电压的畸变都会影响到相应的另外一侧。本文提出了一种电流控制空间矢量方法。该方法将电流控制和空间矢量调制相结合,强制输出电流空间矢量幅值为一恒定量,通过修正调制系数来调节输入电压空间矢量的作用时间,从而补偿输入电压畸变带来的影响,使输入电流和输出电压仍能保持正弦,硬件实现简单。Matlab／Simulink仿真结果验证了该方法的正确性。     

(F)-Decomposition of Minimax Module over Hyper Finite Groups

Let G be a hyper finite locally solvable group, A a minimax ZG-module, (F) a locally defined formation consisting of locally solvable groups, A has no nonzero infinite irreducible ZG-factors, and G ∈(F) . The following results are proved: if A has a maximal submodule B such that A/B is central in G and B has no nonzero (F)-central ZG-factors, then A has an (F)-decomposition; if A has an irreducible (F)-central submodule B such that all ZG-composition factors of A/B are (F)-eccentric, then A has an (F)-decomposition.     

MORPHOLOGICAL STUDY ON VERTEBARTE MELANOCYTES

ＴｈｅＭｅｌａｎｏｃｙｔｅ（ＭＣ）ｉｓａｔｙｐｅｏｆｄｅｎｄｒｉｔｉｃｃｅｌｌｓｗｈｉｃｈｓｙｎｔｈｅｓｉｚｅｓａｎｄｓｅｃｒｅｔｅｓｍｅｌａｎｉｎ〔１,２〕．Ｓｋｉｎｍｅｌａｎｉｎａｃｔｓａｓａｂａｒｒｉｅｒｔｏｔｈｅｓｕｎｌｉｇｈｔａｎｄｕｌｔｒａｖｉｏｌｅｔｒａｙ．ＩｎｏｒｄｅｒｔｏｅｘｐｌｏｒｅｔｈｅｄｅｖｅｌｏｐｍｅｎｔｏｆＭＣｉｎｐｈｙｌｏｇｅｎｅｔｉｃｐｒｏｃｅｓｓａｎｄｔｏｍａｋｅａｆｕｒｔｈｅｒｕｎｄｅｒｓｔａｎｄｉｎｇｏｎｔｈｅｆｕｎｃｔｉｏｎｏｆＭＣａｎｄｄｉｓｅａｓｅｓｒ…     

某型电机调速系统控制回路设计

根据装备正常工作对输入控制信号的要求,设计了该型装备电机调速系统控制回路。该控制回路采用单片机和FPGA协同工作,用数字方式实现SPWM信号。经过实际应用,该方法产生的电机调速系统控制信号不仅精度高,调节方便,而且系统非常稳定,适宜于大多数野外场所使用。     

基于MSP430单片机的轴频电场测量系统研究

为较好地完成水中目标电场信号的测量,设计一套基于MSP430F169单片机的轴频电场测量系统,能解决测量中低功耗、低噪声等关键技术。系统具有便于携带、精度符合实际要求、性能可靠等特点。     

The Evaluation and Selection of Outsourcing Suppliers in Mass Customization （MC）

Many MC companies find it necessary to cooperate with a large number of outsourcing suppliers to provide MC products according to customers＇ diversified orders. To this end, how to select competitve suppliers for the outsourcing manufacturing of non-core processes is the key to establish strong supply chain ally of MC company as well as make the company more efficient in its core manufacturing processes. A procedure of selecting outsourcing suppliers was presented to identify and find competitive suppliers. The continuous improvement of this procedure was proposed to ensure the optimal supply chain of MC company in the long run. Besides, a multi-criteria evaluation model in the procedure was set up according to MC＇s characteristic with fuzzy multi-criteria methods combined to solve the fuzzy problems of criteria weight and qualitative attribute value. A case study of MC manufacturing company was provided to show that the procedure ,model and methods are effective to select outsourcing suppliers.     

一种高精度电流源的设计

介绍一种高精度,可预置的数字显示直流电流源的软件、硬件设计方法。该系统是基TC8051F040单片机开发的。文中给出了硬件电路和软件流程。系统具有性能可靠、结构简单、精度高等优点。     

基于MC9S12HZ256的汽车仪表步进电机控制

介绍了MC9S12HZ256微控制器的电机控制模块（MC）和失步检测模块（SSD）,提出了使用该模块控制汽车仪表步进电机的方法,给出了控制软件的流程图。通过所研制的汽车组合仪表对步进电机驱动控制和归零控制进行了调试,结果表明,步进电机运行准确、性能可靠。