A dynamical approach to generate chaos in a micromechanical resonator

作     者：Martial Defoort Libor Rufer Laurent Fesquet Skandar Basrour 

作者机构：Univ.Grenoble AlpesCNRSGrenoble INPTIMA38000 GrenobleFrance 

出 版 物：《Microsystems & Nanoengineering》 (微系统与纳米工程（英文）)

年 卷 期：2021年第7卷第1期

页      面：161-171页

核心收录：

学科分类：0808[工学-电气工程] 07[理学] 0809[工学-电子科学与技术（可授工学、理学学位）] 0817[工学-化学工程与技术] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 070201[理学-理论物理] 0802[工学-机械工程] 0811[工学-控制科学与工程] 0702[理学-物理学] 

基　　金：funded by the Federation of Micro and Nanotechnologies(FMNT) supported by the French National Research Agency in the framework of the“Investissements d’avenir”program(ANR-15-IDEX-02)。 

主　　题：chaotic chaos dynamical 

摘      要：Chaotic systems,presenting complex and nonreproducible dynamics,may be found in nature,from the interaction between planets to the evolution of weather,but can also be tailored using current technologies for advanced signal processing.However,the realization of chaotic signal generators remains challenging due to the involved dynamics of the underlying physics.In this paper,we experimentally and numerically present a disruptive approach to generate a chaotic signal from a micromechanical resonator.This technique overcomes the long-established complexity of controlling the buckling in micro/nanomechanical structures by modulating either the amplitude or the frequency of the driving force applied to the resonator in the nonlinear regime.The experimental characteristic parameters of the chaotic regime,namely,the Poincarésections and Lyapunov exponents,are directly comparable to simulations for different configurations.These results confirm that this dynamical approach is transposable to any kind of micro/nanomechanical resonator,from accelerometers to microphones.We demonstrate a direct application exploiting the mixing properties of the chaotic regime by transforming an off-the-shelf microdiaphragm into a true random number generator conforming to the National Institute of Standards and Technology specifications.The versatility of this original method opens new paths to combine the unique properties of chaos with the exceptional sensitivity of microstructures,leading to emergent microsystems.