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调心滚子轴承套圈车削留量的确定
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作者 隋帅 戴一凡 《中文科技期刊数据库(全文版)自然科学》 2019年第1期50-50,52,共2页
分析了特大型调心滚子轴承套圈车削加工的主要影响因素。针对存在的问题,在车削技术条件基本不变的情况下,重新制订了套圈车削留量。经生产实践验证,提高了生产效率及硬车质量,节省了硬车刀具和磨料。轴承内、外圈车削留量及车加工技术... 分析了特大型调心滚子轴承套圈车削加工的主要影响因素。针对存在的问题,在车削技术条件基本不变的情况下,重新制订了套圈车削留量。经生产实践验证,提高了生产效率及硬车质量,节省了硬车刀具和磨料。轴承内、外圈车削留量及车加工技术条件是否合适,直接关系到磨加工的生产效率和产品质量。若车削留量大,车工技术条件就可以相应地放松。但这样不仅增加了砂轮和硬车刀具的消耗,还影响生产效率。反之,车削留量过小,技术条件就要求相应严格,否则,废品率上升。车削技术条件是保证磨加工质量的基础,与车削留量有着密切的关系 。但因为车加工设备能力的限制,车工技术条件不能再压缩,只能压缩车工留量,规范车工技术条件。 展开更多
关键词 轴承套 圈车
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Filtering algorithm and direction identification in relative position estimation based on induction loop-cable 被引量:2
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作者 窦峰山 戴春辉 谢云德 《Journal of Central South University》 SCIE EI CAS CSCD 2016年第1期112-121,共10页
A filtering algorithm and direction identification method are presented for the positioning system of the mid-speed maglev train. Considering the special structure of the mid-speed maglev train, the ground position es... A filtering algorithm and direction identification method are presented for the positioning system of the mid-speed maglev train. Considering the special structure of the mid-speed maglev train, the ground position estimation method is adopted for its traction system. As the train is running, the induction loop-cable receives the signal sent by the on-board antenna to detect the position and direction of the train. But the height of the on-board antenna relative to the loop-cable is highly vulnerable to the change of the suspension height and the magnetic field produced by the traction during traveling, which may lead to amplitude fluctuation of the received signal. Consequently, the position estimation may be inaccurate. Therefore, a discrete second-order nonlinear trackdifferentiator is proposed based on the boundary characteristic curves, and the new differentiator could also extract the running direction of the train for the traction system. The experimental results show that the tracking differentiator can effectively filter out the signal interference and can provide accurate direction signal. 展开更多
关键词 maglev train positioning system loop-cable tracking-differentiator (TD) direction identification
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