Enhanced Vibration Suppression and Energy Harvesting by Exploiting Features of Nonlinear Systems

利用非线性系统的特征增强振动抑制和能量收集

• 批准号: RGPIN-2016-04419
• 负责人: Liu, Kefu
• 金额: $ 2.4万
• 依托单位: Lakehead University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=708855
• 关键词: Enhanced; Vibration; Suppression; Energy; Harvesting

Excessive vibration causes machines to malfunction and leads to failure; therefore, vibration control is important to ensure that machines operate properly. Recently, harvesting the energy from vibrations, instead of dissipating it through damping, has become a fruitful area of study. Much of this work has been driven by the need to power wireless sensors. The optimal outcome would be to achieve vibration suppression and energy harvesting (VSEH) simultaneously. The existing research has focused on using a linear mass-spring-damper system for this purpose. The shortcoming of such a device is that it is effective only in a narrow vibrational frequency band. Many studies have been conducted on broadband vibration suppression or broadband energy harvesting. However, few studies on simultaneous VSEH under broadband ambient vibration environment have been reported. Recently the applicant and his graduate students have initiated a new research direction that focuses on simultaneous VSEH. Inspired by the concept of the nonlinear energy sink, a nonlinear energy sink and harvester (NESH) was developed. This proposal will enhance the broadband capability of simultaneous VSEH by exploiting features of nonlinear systems. Three objectives will be addressed. (1) Develop new NESH devices by exploiting the features of nonlinear systems and varying their configurations and attachment schemes. (2) Model, analyze, and test developed NESHs. Modelling will be tackled both analytically and experimentally. Analysis approaches will primarily include numerical integration, nonlinear normal mode analysis, and the mixed Multiple Scale/Harmonic Balance algorithm. Testing will validate the results of the analytical studies. (3) Optimize developed NESHs through multi-objective optimization, in which two conflicting goals, minimizing vibration and maximizing energy, will be combined into a single objective function by properly choosing weight factors. Research on simultaneous VSEH is a relatively new area. The proposed research is novel, because the NESH is different from existing devices. The outcomes of the proposed research will be new VSEH devices with many potential applications, such as monitoring the integrity of machines and structures using self-powered wireless sensors. The study is driven both by academic curiosity and industrial need. New knowledge and techniques will be gained. Because the study covers a wide spectrum of mechatronics, it will provide excellent opportunities for the training of highly qualified personnel. It is highly anticipated that the knowledge and techniques generated from this research program will have a strong potential to benefit to Canada's industry and society in the areas of safer machines and structures.

过度振动会导致机器发生故障并导致故障。因此，振动控制对于确保机器正确运行很重要。最近，从振动中收集能量，而不是通过阻尼来消散它，已成为一个富有成果的研究领域。这项工作的大部分都是由为无线传感器供电的。最佳结果是同时实现振动抑制和能量收集（VSEH）。现有的研究重点是为此目的使用线性质量弹簧式抑制系统。这种设备的缺点是它仅在狭窄的振动频带中有效。许多研究已经进行了有关宽带振动抑制或宽带能量收集的研究。但是，在宽带环境振动环境下，很少有关于同时VSEH的研究。最近，申请人及其研究生提出了一个新的研究方向，专注于同时进行VSEH。受到非线性能量水槽的概念的启发，开发了非线性能量水槽和收割机（NESH）。该建议将通过利用非线性系统的特征来增强同时VSEH的宽带能力。将解决三个目标。 （1）通过利用非线性系统的功能并改变其配置和附件方案来开发新的NESH设备。 （2）模型，分析和测试开发了NESHS。建模将在分析和实验上进行解决。分析方法将主要包括数值集成，非线性正常模式分析和混合的多尺度/谐波平衡算法。测试将验证分析研究的结果。 （3）通过多目标优化优化开发的NESH，其中两个相互矛盾的目标将振动和最大化能量最小化，将通过正确选择权重因子组合到一个单个目标函数中。同时VSEH的研究是一个相对较新的领域。拟议的研究是新颖的，因为NESH与现有设备不同。拟议研究的结果将是具有许多潜在应用的新型VSEH设备，例如使用自动无线传感器监视机器和结构的完整性。这项研究既由学术好奇心和工业需求驱动。新知识和技术将获得。由于该研究涵盖了各种各样的机电一体化，因此它将为培训高素质的人员提供绝佳的机会。备受期待的是，该研究计划产生的知识和技术将在更安全的机器和结构领域中受益于加拿大的行业和社会。