讲座题目：The X-Structure/Mechanism Approach to Beneficial Nonlinear Design in Engineering
讲座时间：2022/6/8（周三）下午15:00-16:30
腾讯会议ID：153-174-350
https://meeting.tencent.com/dm/lDVeIPiXJIGW
邀请人：曹军义教授
讲座人：景兴建 教授
景兴建，博士，香港城市大学机械工程系教授。分别获浙江大学学士（1998）、中科院自动化所硕士（2001）和博士学位（2005），英国Sheffield大学博士（2008）。主要研究领域：非线性系统分析、设计、信号处理、辨识及其在振动控制、能量采集、故障诊断、机器人等方面的应用。发表文章200多篇，文章检索7600多次，H-index 46 (Google Scholar)。现任国际知名杂志Mechanical Systems and Signal Processing, IEEE Trans. on Industrial Electronics, IEEE Trans. on Systems, Man, Cybernetics -Systems和IEEE/ASME Trans. Mechatronics的副主编。并于2019年和2021年分别在MSSP上任专刊主编—“Exploring nonlinear benefits in engineering”。曾获得中科院刘永龄奖，中科院院长优秀奖，EPSRC-Hutchison Whampoa Dorothy Hodgkin Award，Highest International Consultancy Award，2016 IEEE SMC best transaction paper award，2017美国TechConnect全球技术创新奖，2017欧洲结构动力学协会Senior Research Prize，和2017香港建筑业议会建筑技术创新一等奖等。研究工作得到香港RGC、国家自然基金、中海油技术服务有限公司、中国航天技术研究院、中国航天控股公司、Lord公司及其它香港广州和国际公司的资助。
讲座简介：
Nonlinearity can take an important and critical role in engineering systems and thus cannot be simply ignored in structural design, dynamic response analysis, and parameter selection. A key issue is how to analyze and design potential nonlinearities introduced to or inherent in a system of under study. This is a must-do task in many practical applications involving vibration control, energy harvesting, sensor systems and robots etc.
This lecture presents an up-to-date review on a cutting-edge method for nonlinearity manipulation and employment developed in recent several years, named as the X-shaped structure or mechanism approach. The method is inspired from animal leg/limb skeletons and can provide passive low-cost high-efficiency adjustable and beneficial nonlinear stiffness (high static & ultra-low dynamic), nonlinear damping (dependent on resonant frequency and vibration excitation amplitude) and nonlinear inertia (low static & high dynamic) individually or simultaneously. The X-shaped structure or mechanism is a generic structure or mechanism representing a class of beneficial geometric nonlinearity with realizable and flexible linkage mechanism or structural design of different variants or forms (quadrilateral, diamond, polygon, K/Z/S/V-shape, or others) which all share similar geometric nonlinearity and thus similar nonlinear stiffness/damping properties, flexible in design and easy to implement. This paper systematically reviews the research background & motivation, essential bio-inspired ideas, advantages of this novel method, beneficial nonlinear properties in stiffness, damping and inertia, and potential applications, and ends with some remarks and conclusions.
