Controlling Multistability in Vibro-Impact Systems: Theory and Experiment

控制振动冲击系统的多稳定性：理论与实验

• 批准号: EP/P023983/1
• 负责人: Yang Liu
• 金额: $ 12.89万
• 依托单位: UNIVERSITY OF EXETER
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2017
• 资助国家: 英国
• 起止时间: 2017 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FP023983%2F1
• 关键词: Controlling; Multistability; Vibro; Impact; Systems

UK has been one of the industrial powerhouses of Europe from the time of the Industrial Revolution onwards. Today, it is a major challenge for power intensive industries in the UK to optimize their energy strategy in order to ensure long-term sustainable economic growth. Strategies for engineering systems to improve their energy efficiency are to become vital. This project intends to unravel a practical question: can we improve the energy efficiency of engineering systems through judiciously switching between their coexisting states? The proposed research aims to develop a novel control strategy for multistable engineering systems in order to maintain their performance within a satisfactory level by implementing an energy-optimal steering. This will be achieved by studying a novel non-smooth dynamical system, namely the vibro-impact capsule system through both theoretical development and experimental validation. For the first time, the project aims to use the system's basins of attraction (BoA) for control purpose, and seeks the minimum energy solution by exploiting the positive attributes of multistability. In the long term, this project will be fundamental for the realization of energy efficient control, which will provide safe, reliable, and efficient operations for future engineering systems. The approach to realize this ambitious goal in a 21 month project is: (i) to study multistability in the vibro-impact capsule system and its BoA numerically and experimentally; (ii) to develop a new control strategy for switching between different coexisting attractors; and (iii) to verify the proposed control strategy experimentally using the experimental rig of the capsule system.

自工业革命以来，英国一直是欧洲的工业强国之一。今天，优化能源战略以确保长期可持续的经济增长是英国电力密集型行业面临的重大挑战。工程系统提高能效的战略将变得至关重要。这个项目旨在揭示一个实际问题：我们能否通过明智地在共存状态之间切换来提高工程系统的能效？该研究旨在开发一种新的多稳态工程系统控制策略，以实现能量最优转向，从而使其性能保持在令人满意的水平。这将通过研究一种新型的非光滑动力学系统，即冲击振动胶囊系统，通过理论发展和实验验证来实现。该项目首次将系统的吸引盆地(BoA)用于控制目的，并通过利用多重稳定性的积极属性来寻求最小能量解决方案。从长远来看，该项目将是实现节能控制的基础，将为未来的工程系统提供安全、可靠和高效的运行。在21个月的项目中实现这一雄心勃勃的目标的方法是：(I)通过数值和实验研究碰撞振动胶囊系统及其BoA的多稳定性；(Ii)开发一种新的控制策略，用于在不同共存吸引子之间进行切换；以及(Iii)利用胶囊系统的实验台进行实验验证。

项目成果

Application and comparison of feature-based classification models for multistable impact motions of percussive drilling

• DOI: 10.1016/j.jsv.2021.116205
• 发表时间: 2021-09
• 期刊: Journal of Sound and Vibration
• 影响因子: 4.7
• 作者: K. O. Afebu;Yang Liu;E. Papatheou

Dynamical response of a rocking rigid block.

• DOI: 10.1063/5.0040962
• 发表时间: 2021-07
• 期刊: Chaos
• 影响因子: 2.9
• 作者: Y. Liu;J. Páez Chávez;P. Brzeski;P. Perlikowski

Discontinuity-induced bifurcations in a piecewise-smooth capsule system with bidirectional drifts

• DOI: 10.1016/j.cnsns.2021.105909
• 发表时间: 2021-06
• 期刊: Commun. Nonlinear Sci. Numer. Simul.
• 作者: Bingyong Guo;J. P. Chávez;Yang Liu;Caishan Liu

Analysis and control of the dynamical response of a higher order drifting oscillator.

• DOI: 10.1098/rspa.2017.0500
• 发表时间: 2018-03
• 期刊: Proceedings. Mathematical, physical, and engineering sciences
• 作者: Liu Y;Páez Chávez J;Pavlovskaia E;Wiercigroch M
• 通讯作者: Wiercigroch M

Self-propelled capsule endoscopy for small-bowel examination: Proof-of-concept and model verification

• DOI: 10.1016/j.ijmecsci.2020.105506
• 发表时间: 2020-05
• 期刊: International Journal of Mechanical Sciences
• 影响因子: 7.3
• 作者: Bingyong Guo;Yang Liu;R. Birler;S. Prasad