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电网机巡作业风险评估模型研究
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作者 李雄刚 郭启迪 《科技创新导报》 2017年第23期189-189,191,共2页
近年来,架空输电线路资产规模不断扩大,依靠人工为主的巡检模式因为工作效率低、巡线工人不足等原因难以满足发展需要,南方电网公司创新性提出"机巡为主、人巡为辅"的架空输电线路巡检模式。作为电网中的新兴业务,如何确保机... 近年来,架空输电线路资产规模不断扩大,依靠人工为主的巡检模式因为工作效率低、巡线工人不足等原因难以满足发展需要,南方电网公司创新性提出"机巡为主、人巡为辅"的架空输电线路巡检模式。作为电网中的新兴业务,如何确保机巡作业安全,是电网企业管理的重点,同时也是一个难点,风险管理思想的引入,为机巡作业安全提供了管理的思路与指引,阐述了如何应用持续风险评估风险评估理论管控机巡作业风险,创造性地提出通过从交叉跨越方式与数量、作业环境、作业性质、电网等级、电网风险、巡视区域、飞行地域、线路密集程度、巡视机型等九个因素来分析对机巡作业的风险管控影响。 展开更多
关键词 机巡作业 风险评估 风险后果 危害因素
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Inverse speed analysis and low speed control of underwater vehicle
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作者 李晔 姜言清 +2 位作者 马珊 陈鹏云 李一鸣 《Journal of Central South University》 SCIE EI CAS 2014年第7期2652-2659,共8页
Inverse speed is a reversible maneuver.It is a characteristic of underwater vehicle at low speed.Maneuverability in the vertical plane at a speed lower than inverse speed is different from one at higher speed.In the p... Inverse speed is a reversible maneuver.It is a characteristic of underwater vehicle at low speed.Maneuverability in the vertical plane at a speed lower than inverse speed is different from one at higher speed.In the process of underwater working for observation,AUV's cruise speed is always low.Therefore,the research on inverse speed is important to AUV's maneuverability.The mechanism of inverse speed was analyzed,and then the steady pitching equation was derived.The parameter expression of track angle in vertical plane was deduced.Furthermore,the formula to calculate the inverse speed was obtained.The typical inverse speed phenomenon of the flat body and the revolving body was analyzed.Then the conclusion depicts that,for a particular AUV with flat body,its inverse speed is lower than that of revolving body.After all the calculation and the analysis,a series of special experiments of inverse speed were carried out in the simulation program,in the tank and in the sea trial. 展开更多
关键词 underwater vehicle motion control inverse speed
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