交变流体驱动的冲击机构动力学与控制研究

项目名称： 交变流体驱动的冲击机构动力学与控制研究

项目编号： No.11272122

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 丁问司

作者单位： 华南理工大学

项目金额： 95万元

中文摘要： 项目以交变流体（液压、气压）往复驱动的高速、高加速变化的冲击机构动力学行为与驱动控制策略为研究对象，通过建立流控冲击机构近似刚柔液耦合动力学模型，揭示流体驱动的二元、三元冲击系统在弹性、塑性、黏弹性、黏塑性工作介质下的非线性波动力学特性及其对驱动控制性态的影响规律。将现代时频分析技术中Hilbert-Huang变换(HHT)和细化调制谱分析等方法运用到对流体约束作用下的冲击活塞反弹特征提取中，并根据提取的反弹动力学特征，提出相应行之有效的工作介质智能辨识方法。进一步，研究冲击应力波在多种杆件结构中的传播方式，采用反演设计方法分析流体激励形态，优化冲锤结构。为冲击机构系统的动力学分析和柔性冲击的主动控制提供新的理论和方法。

中文关键词： 交变流体驱动；非线性动力学；冲击机械；应力波；参数识别

英文摘要： Project to alternating fluid (hydraulic, pneumatic) reciprocating drive of the high speed, high accelerating changes impact mechanism as the research object, analyse the dynamic behavior and study on the control strategy of driving. Through the establishment of approximate dynamics model of rigid-flexible-fluid coupling, revealing the of binary, ternary fluid-driven impact machines nonlinear waves dynamic characteristics in elastic, plastic, visco-elastic and visco-plastic working medium, and its effect on driving behavior. With the Time-Frequency Spectrum Analysis of modern technology, such as the Hilbert-Huang transform (HHT) and the refining modulation spectrum analysis method, the rebounded characteristics of piston which under fluid pressure constraints are extracted, and according to the bounce signal characteristics, the corresponding the working medium of effective intelligent identification methods was put forward. Further, research on the impact stress wave propagation in structures in a variety of piston, using inverse design method for analysis of fluid drive patterns, optimize the structure of impact piston. New theories and methods of impact mechanism nonlinear dynamics analysis and flexible impact system active control will be found.

英文关键词： Alternating fluid drive；Nonlinear dynamics；Impact machines；Stress wave；Parameter identification