QQ客服 官方微博 反馈留言

浏览/检索结果: 共4条，第1-4条 帮助 限定条件 内容类型：会议论文     已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 Weld pool oscillation frequency in pulsed gas tungsten arc welding with varying weld penetration 会议论文 Gothenburg, Sweden, August 24, 2015 - August 28, 2015 作者:  Shi, Yu;  Zhang, Gang;  Li, Chunkai;  Gu, Yufen;  Fan, Ding 收藏  |  浏览/下载：1/0  |  提交时间：2020/11/15 Gas metal arc welding  Gas welding  High speed cameras  Image processing  Intelligent robots  Robot applications  Robotics  Tungsten  Complete joint penetrations  GTAW  Image processing algorithm  Laser vision  Oscillation frequency  Pulsed gas tungsten arc welding  Weld penetrations  Weld pool   Weld Pool Oscillation Frequency in Pulsed Gas Tungsten Arc Welding with Varying Weld Penetration 会议论文 作者:  Shi, Yu;  Zhang, Gang;  Li, Chunkai;  Gu, Yufen;  Fan, Ding 收藏  |  浏览/下载：7/0  |  提交时间：2019/11/15 GTAW  Weld Penetration  Weld pool oscillation  laser vision   Study on pressure fluctuation of a pump-turbine under the abnormally low head 会议论文 Wuhan, China, October 22, 2014 - October 25, 2014 作者:  Li, Qifei;  Tan, Haiyan;  Li, Rennian;  Jiang, Lei;  H., Quan 收藏  |  浏览/下载：17/0  |  提交时间：2020/11/15 Computational fluid dynamics  Computer simulation  Hydraulic turbines  Numerical models  Pumped storage power plants  Pumps  Turbulence models  Geometric modeling  Guide vane openings  Low head  Operating condition  Periodic variation  Pressure fluctuation  Pump-turbines  Unsteady numerical simulations   Friction compensation with repeat control at low speed for an optoelectronic system (EI CONFERENCE) 会议论文 Optomechatronic Systems III, November 12, 2002 - November 14, 2002, Stuttgart, Germany Chen J.; Guo J.; Chen T.; Bai W. 收藏  |  浏览/下载：16/0  |  提交时间：2013/03/25 Concerning the disturbances at low speed  such as friction at zero crossings and the moment fluctuation of the motor  we explore the repeat control method rooted in study law to compensate the low-speed-disturbances  and the system's properties at low speed are improved greatly. Here we present our works. Section 1 is the introduction. The friction and moment fluctuation of the motor at low speed for the optoelectronic system are tested out which are shown in section 2. We introduce a repeat controller to the system to compensate the low-speed disturbances in section 3. Concerning the stability  a filter is added to the repeat controller. The experimental results are discussed in section 4. Not only the repeat control can overcome some low-speed-disturbances  but is more useful when tracking a periodic input signal.