Enhanced energy harvesting using time-delayed feedback control from random rotational environment

被引:27
作者
Zhang, Yanxia [1 ,3 ]
Jin, Yanfei [1 ]
Li, Yang [2 ,3 ]
机构
[1] Beijing Inst Technol, Dept Mech, Beijing 100081, Peoples R China
[2] Nanjing Univ Aeronaut & Astronaut, Coll Aerosp Engn, State Key Lab Mech & Control Mech Struct, Nanjing 210016, Peoples R China
[3] IIT, Dept Appl Math, Coll Comp, Chicago, IL 60616 USA
基金
中国国家自然科学基金;
关键词
Coupled energy harvester; Colored noise; Time-delayed feedback control; Stochastic resonance; Optimization; DUFFING OSCILLATOR;
D O I
10.1016/j.physd.2021.132908
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
Motivated by improving performance of a bi-stable vibration energy harvester (VEH) from the viewpoint of vibration control, the time-delayed feedback control of displacement and velocity are constructively proposed into an electromechanical coupled VEH mounted on a rotational automobile tire, which is subject to colored noise and the periodic excitation. Using the improved stochastic averaging procedure based on energy-dependent frequency, the expressions of stationary probability density (SPD) and signal-to-noise ratio (SNR) are obtained analytically. Then, the efficiency of time-delayed feedback control on the stationary response and stochastic resonance (SR) for the delay-controlled VEH is explored in detail theoretically. Results show that both noise-induced SR and delay-induced SR can occur. Time delay is able to not only enhance the SR behavior but also weaken it. Furthermore, a larger negative feedback gain of displacement and a larger positive feedback gain of velocity are more beneficial for VEH. Interesting finding is that the optimal combination of time delay in maximizing the harvested performance, such as the harvest power, the output voltage and the power conversion efficiency, is almost perfectly consistent with that in maximizing SNR. Compared with the uncontrolled VEH, the delay-controlled VEH can achieve certain desirable optimization in harvesting energy by choosing the appropriate combination of time delays and feedback gains. (C) 2021 Elsevier B.V. All rights reserved.
引用
收藏
页数:9
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