Optimized Active Multidimensional Control Strategy for Nonlinear Vibration Control of Engineering Systems

工程系统非线性振动控制的优化主动多维控制策略

• 批准号: RGPIN-2015-06353
• 负责人: Dai, Liming
• 金额: $ 3.13万
• 依托单位: University of Regina
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=688683
• 关键词: Optimized; Active; Multidimensional; Control; Strategy

Vibrations exist extensively in industries, and most of the vibrations are unwanted as they may have deleterious effects on engineering systems and significantly reduce their operational life. In particular, nonlinear vibrations are unpredictable in nature and may generate complex chaotic motions that are unwanted for almost all the cases. Such vibrations need to be properly controlled or reduced. However, accurate and reliable control of these vibrations is still a challenge facing researchers and engineers in practice.******Active vibration control methodologies have drawn interest from researchers and engineers for their self-adaptive feature and high efficiency. However, most active methodologies are developed on the basis of controlling linear vibrations. In reality, nonlinear vibrations are much more extensively observed. Despite the significance of nonlinear vibrations, only a handful of active nonlinear vibration control methodologies have been developed in the past decades. Furthermore, most of the existing active nonlinear vibration control methodologies can only be applied to systems expressible in a single dimensional form.******Based on the research of the applicant in nonlinear vibration control, the proposed research program aims at developing and further expanding active multidimensional nonlinear vibration control. The proposed research incorporates a fuzzy logic approach to better reduce chattering and cope with uncertainties. An Optimized Active Multidimensional Control strategy is to be developed to fit with the requirements of the multidimensional approach for nonlinear vibration control with high effectiveness. In addition, the P-R method introduced by the applicant for diagnosing the characteristics of nonlinear systems will be further developed to fit with requirements of the proposed program. Moreover, the numerical method named P-T method developed by the applicant is to be modified under the framework of the proposed vibration control strategy to carry out highly accurate and reliable numerical simulations for multidimensional systems. Experiments of a small-scale cantilever beam with sensors, actuators and other electrical control devices are also to be performed to validate and assure the applicability of the proposed control methodology.******The optimized active multidimensional nonlinear vibration control methodology to be established for industrial applications will significantly advance current understanding of nonlinear vibrations, foster useful tools for developing effective vibration control methodologies and techniques, and provide guidance for accurately and effectively controlling and stabilizing the nonlinear vibrations widely seen in engineering fields. In considering the vibration related loss of billions of dollars each year in Canada alone, the economic impact of the proposed research is substantially large.

振动在工业中广泛存在，并且大多数振动是不需要的，因为它们可能对工程系统产生有害影响并显着缩短其使用寿命。特别是，非线性振动本质上是不可预测的，并且可能产生几乎所有情况下都不需要的复杂混沌运动。需要适当控制或减少此类振动。然而，准确可靠地控制这些振动仍然是研究人员和工程师在实践中面临的挑战。******主动振动控制方法以其自适应特性和高效率引起了研究人员和工程师的兴趣。然而，大多数主动方法都是在控制线性振动的基础上开发的。事实上，非线性振动被更广泛地观察到。尽管非线性振动具有重要意义，但在过去几十年中，仅开发了少数主动非线性振动控制方法。此外，大多数现有的主动非线性振动控制方法只能应用于以一维形式表达的系统。******基于申请人在非线性振动控制方面的研究，所提出的研究计划旨在开发和进一步扩展主动多维非线性振动控制。拟议的研究采用了模糊逻辑方法，以更好地减少抖动并应对不确定性。将开发一种优化的主动多维控制策略，以满足高效非线性振动控制多维方法的要求。此外，申请人引入的用于诊断非线性系统特性的P-R方法将得到进一步发展，以适应所提出程序的要求。此外，申请人开发的数值方法P-T方法将在所提出的振动控制策略的框架下进行修改，以对多维系统进行高精度和可靠的数值模拟。还将进行带有传感器、执行器和其他电气控制装置的小型悬臂梁实验，以验证和确保所提出的控制方法的适用性。******优化的主动多维非线性振动控制方法为工业应用而建立的模型将显着增进当前对非线性振动的理解，为开发有效的振动控制方法和技术提供有用的工具，并为准确有效地控制和稳定工程领域广泛存在的非线性振动提供指导。考虑到仅在加拿大每年与振动相关的损失就达数十亿美元，拟议研究的经济影响相当大。