Acquisition of a 3D Motion Analysis System

该提案的总体目标是获得一套VICON 612运动分析系统(MAS)，并将其集成到PIS的现有研究机构中，2)加强PIS之间的新合作研究，3)开发新的测量技术，4)将其集成到PIS两个系的选定本科生和研究生课程中，以及5)将设备提供给大学的其他研究人员。当可见的红色数字LED闪光灯点亮固定在系统上的微小的反向反射标记时，MAS使用高分辨率的cmos相机来捕捉动态系统的照片。使用摄影测量法自动计算至少两个相机看到的每个反向反射标记的瞬时三维坐标，并且所有标记的位移、速度和加速度可用于执行动态动画和进一步的信号处理，以进行动态表征、损伤检测和控制。在物理上不同于普通点传感器(如加速计和接近传感器)和轮廓传感器(如录像机)，MAS可以同时、非接触和精确地测量经历大型运动的机械系统上多达100个点的3D坐标。这项工作将解决关键的实验问题，并开发先进的实验技术，用于HFSS和其他机械和航空航天系统的测试、设计验证、损伤检测、建模和快速原型制造。这项工作将提高可展开/充气空间结构和其他机械系统的非线性静力学、动力学、控制和设计方面的知识。该系统将极大地增强工程专业学生在以下领域的研究密集型学习环境：1)机械和航空航天系统的振动测试和分析，2)可展开/充气空间结构的测试和表征，3)机械系统的运动控制，4)主动结构的设计，以及5)人体运动的建模。预计这项工作对现代空间、航空航天、机械和民用系统设计的潜在影响将是非常重大和广泛的。

Abstract1The overall objective of the proposal is to acquire a VICON 612 Motion Analysis System (MAS)and to 1) integrate it into existing research setups of the PIs, 2) strengthen new collaborativeresearch among the PIs, 3) develop new measurement techniques, 4) integrate it into selectedundergraduate and graduate courses in the two departments of the PIs, and 5) make the equipmentavailable to other researchers at the University. A MAS uses high-resolution CMOS cameras tocapture pictures of a dynamical system when visible red digital LED strobes light up tiny retro-reflectivemarkers that are fixed on the system. Instantaneous three-dimensional coordinates ofeach retro-reflective marker that is seen by at least two cameras are automatically calculatedusing photogrammetry, and displacements, velocities, and accelerations of all makers areavailable for performing dynamic animation and further signal processing for dynamicscharacterization, damage detection, and control. Physically different from common point sensors(e.g., accelerometers and proximity sensors) and profile sensors (e.g, video recorders), the MASoffers simultaneous, non-contact, and accurate measurements of 3D coordinates of as many as100 points on a mechanical system undergoing large motions.This work will solve critical experimental issues and develop advancedexperimental techniques for the testing, design verification, damage detection, modeling, andrapid prototyping of HFSs and other mechanical and aerospace systems. This work will advancethe knowledge of nonlinear statics, dynamics, control, and design of deployable/inflatable spacestructures and other mechanical systems. The system will dramatically enhanceresearch-intensive learning environments for training engineering students in the areas of 1)vibration testing and analysis of mechanical and aerospace systems, 2) testing andcharacterization of deployable/inflatable space structures, 3) motion control of mechanicalsystems, 4) design of active structures, and 5) modeling of human movement. The potentialimpact of this work on the design of modern space, aerospace, mechanical, and civil systems isexpected to be very significant and broad.