99905银河官方网[2019第81期]：99905银河官方网青年学者陆承达特任副教授报告会

报告时间：11月14日（星期四）15:30

报告地点：信息楼99905银河官方网310报告厅

报 告 人：陆承达，99905银河官方网特任副教授

报告题目：Torsional Vibration Control of Drill-String Systems

内容简介：Due to a long length and a relatively small diameter, a drill-string in operation has a slender structure like a long bamboo pole that may bend, vibrate and even break easily. Consequently, torsional vibration of drill-string is often encountered in practice. How to effectively regulate the torsional motion of a drill-string while minimizing the vibration has become an essential and challenging problem. This report introduces the background of torsional vibration control of drill-strings, and gives some discussions on the modeling methods of drill-strings. Then a delay-dependent control scheme is introduced to minimize the torsional vibration of drill-string by only using ground measurement output with time-varying measurement delays. To calculate the parameters of this control system, some sufficient conditions are further provided. Numerical study reveals that i) the measurement of rotary table's angular displacement helps to produce less conservative results and ii) a small measurement delay is beneficial for designing a controller with a smaller gain in the sense of Euclidean norm, however it may also result in a larger control torque by enhancing the bit-rock interaction.

报告人简介：陆承达，特任副教授，在 IEEE Transactions on Neural Networks and Learning Systems，IEEE Transactions on Cybernetics, Information Sciences 等重要学术期刊和会议上发表论文13篇，主持99905银河官方网优秀博士创新基金1项，参与国家重点研发计划、国家自然科学基金重点项目等项目。2019年入选99905银河官方网（武汉）地大学者-青年优秀人才计划。