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.

过度振动使机器失灵，导致故障；因此，振动控制对于确保机器正常运行非常重要。最近，从振动中获取能量，而不是通过阻尼来消耗能量，已经成为一个富有成果的研究领域。这项工作的大部分是由无线传感器供电的需求推动的。最佳结果是同时实现振动抑制和能量收集（VSEH）。现有的研究集中在使用线性质量-弹簧-阻尼器系统来实现这一目的。这种装置的缺点是只能在较窄的振动频带内有效。针对宽带振动抑制或宽带能量收集进行了大量的研究。然而，关于宽频带环境振动条件下同步VSEH的研究却很少。最近，申请人和他的研究生发起了一个新的研究方向，重点是同步VSEH。受非线性能量汇概念的启发，开发了非线性能量汇收割机（NESH）。该方案将利用非线性系统的特点，提高同步VSEH的宽带性能。将处理三个目标。(1)利用非线性系统的特点，改变非线性系统的结构和连接方案，开发新的NESH装置。(2)对已开发的NESHs进行建模、分析和测试。建模将采用分析和实验两种方法。分析方法主要包括数值积分、非线性正态分析和混合多尺度/谐波平衡算法。测试将验证分析研究的结果。(3)采用多目标优化方法对已开发的NESHs进行优化，通过合理选择权重因子，将振动最小化和能量最大化这两个相互冲突的目标合并为一个目标函数。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不同于现有的设备。这项研究的成果将是具有许多潜在应用的新型VSEH设备，例如使用自供电无线传感器监测机器和结构的完整性。这项研究是由学术好奇心和工业需求共同推动的。将获得新的知识和技术。由于这项研究涵盖了广泛的机电一体化领域，它将为培养高素质人才提供极好的机会。可以高度期待的是，从这个研究项目中产生的知识和技术将在更安全的机器和结构领域为加拿大的工业和社会带来强大的潜力。