《宇航计测技术》征稿启事CSCD

《宇航计测技术》创刊于1981年,是由中国航天科技集团公司主管,中国航天科技集团公司一院102所与中国航天科工集团公司二院203所联合主办的计量技术性刊物,国内外公开发行。     

协调世界时的来历与2012年闰秒

协调世界时的来历与2012年闰秒协调世界时又称世界统一时间、世界标准时间、国际协调时间,从英文Coordinated Universal Time和法文TEMPS UNIVERSELLE COORDINEE而来,简称UTC。它是以国际原子时(TAI)秒长为基准、在时刻上尽量接近世界时(以本初子午线的平子夜起算的平太阳时)的一种时间计量系统。中国大陆采     

军队试验机构计量保障体系建设

本文借鉴美军先进的计量工作经验,以“面向任务、面向装备、面向一线”为指导思想,以准确、敏捷、可靠为目标,结合我军武器试验机构的实际,对计量工作提出了再造制度机制、优化计量专业、拓展职能使命等应对策略,以更好地为我军武器装备的质量建设服务。     

Development of a PC-based Open Architecture Software-CNC System

As a key technology in the field of advanced manufacturing, an open architecture controller is studied. In order to develop an open architecture software-CNC system on personal computer (PC) according to open modular architecture controllers (OMAC). First, the software and hardware platform is chosen and software realization methodology for the CNC system is determined. Second, static mod- eling methods of an open architecture controller inclusive of object-oriented (OO) programming technology, dynamic link library (DLL) technology and system modules partition are investigated. Third, the dynamical behavioral modeling and the data flow representation of open architecture controller are discussed, which are both described in hierarchy finite state machine (FSM) model. Fourth, a reusable software module model is established to develop software function module library. Finally, a 3-axis milling machine tool test-bed, named for HIT-CNC, is successfully designed by means of the constructed software function module library and the system configuring method. The experimental results show that, besides increasing the degree of reusability and openness, application of above-mentioned method- ology leads to significant decrease of development time as well as maintenance cost.