CAREER: Developing Tools of Modern Dynamical Systems for Modeling Dry Friction

职业：开发用于模拟干摩擦的现代动力系统工具

• 批准号: 9624347
• 负责人: Brian Feeny
• 金额: $ 20.5万
• 依托单位: Michigan State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-08-01 至 2001-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9624347&HistoricalAwards=false
• 关键词: CAREER; Developing; Tools; Modern; Dynamical

This Career award emphasizes the development of tools for modeling identification, and response of mechanical systems that include dynamical dry friction. Typical examples of such systems include automobile squeak, rail-wheel squeal, metal cutting processes, and many other manufacturing applications. These phenomenon are inherently nonlinear and their realistic modeling is crucial to understanding their true dynamic behavior primarily applied to automotive squeak. The approach involves wavelets to quantify the frequency-time characteristics of the stick-slip and noise events. Modern dimensionality theory incorporating state space variables is used to accommodate the nonsmoothness of stick-slip systems. Direct measurements of friction during velocity reversals lead to establishing relationships between the friction and the displacements, velocities, accelerations, and time. Educational innovations include developing a nonlinear oscillation course for off-campus delivery, incorporating computers in courses, projecting animations in lectures, and performing physical demonstrations in the classroom to illustrate complex dynamic phenomena.

该职业奖强调了建模识别工具的开发以及包括动态干摩擦在内的机械系统的响应。此类系统的典型示例包括汽车尖叫，铁路尖叫，金属切割工艺以及许多其他制造应用。这些现象本质上是非线性的，它们的现实建模对于理解其真正用于汽车尖叫的真实动态行为至关重要。该方法涉及小波以量化板滑行和噪声事件的频率特征。现代维度理论结合了状态空间变量，用于适应粘纸系统的非平滑度。速度逆转过程中摩擦的直接测量导致建立摩擦与位移，速度，加速度和时间之间的关系。教育创新包括开发用于校外交付的非线性振荡课程，将计算机纳入课程中，在讲座中投射动画以及在课堂上进行身体演示，以说明复杂的动态现象。