Dynamics of systems operating in coupled motion environments

许多铰接式动力系统在基本规定的运动环境中运行。这意味着，尽管整个系统在理论上是动态耦合的，但在许多情况下，由于能量和动量的不同，可以认为感兴趣的子系统受到更大系统的影响，但不会对其产生重大影响。这种规定的运动系统的例子包括固定在船舶飞行甲板上的飞机、用于高速船艇(HSC)的减震悬挂座椅，以及用急救车辆运送的新生儿患者。在这样的例子中，较大系统(船/船/救护车)的有效规定运动提供了较轻系统的主要动态激励。其他影响，如气动载荷和子系统之间的力耦合，也会影响系统动力学，并会受到较大系统运动的影响。对这类问题的调查是申请者由NSERC资助的持续研究计划的主题。虽然最初的项目主要侧重于舰载系统，但最近对非海事系统的参与证实，存在着有效地将所学知识应用于其他类似环境的重大机会。例如，以前的工作和新生儿患者在空中转移的动态之间似乎有密切的相似之处，这两种方法都可以停飞救护车。因此，目前的建议旨在继续或完成一些先前的工作；但重要的是，也将其扩展到运动环境中的动态系统操作必不可少但危险的其他应用。作用在这些系统上的力的时变性和非线性使得传统的静态、准静态和频域方法不足以理解动态界面的真实性质。严格的分析依赖于多体动力学、车辆动力学、结构分析、暂态计算机模拟、统计分析和空气动力学原理的融合。这一持续的研究方案正在开发和验证计算工具，并应用它们来提高对这些复杂动态系统的理解。所考虑的系统类别包括刚体系统、柔体系统和人类生物动力系统。该方法将与最近的工作保持一致，并继续涉及理论、计算和实验部分。拟议的研究旨在帮助提高在运动环境中操作的人员和设备的安全性和可操作性。通过对HQP进行培训、与研究的最终用户接触、公开发表研究成果以及参与诸如海上人类行为问题国际工作组等影响深远的组织，将继续努力最大限度地发挥这项研究的积极影响，并保持加拿大在调查领域的领导地位。

Many articulated dynamic systems operate in essentially-prescribed motion environments. This means that though the entire system is theoretically dynamically coupled, in many cases due to differences in energy and momentum, subsystems of interest can be considered to be influenced by the larger system but not to have significant impact upon it. Examples of such prescribed motion systems include an aircraft secured to a ship's flight deck, a shock-mitigating suspension seat used on high-speed marine craft (HSC), and a neonatal patient being transported in an emergency vehicle. In such examples, the effectively-prescribed motion of the larger system (ship/boat/ambulance) provides the primary dynamic excitation of the much lighter system. Other influences, such as aerodynamic loading and force coupling between subsystems, also can affect the system dynamics and can be influenced by the motion of the larger system. Investigation of this class of problem is the subject of the applicant's continuing NSERC-funded research programme. While initial projects focused primarily on shipboard systems, recent involvement with non-maritime systems has confirmed that significant opportunities exist to efficiently adapt what has been learned to other similar environments. As an example, there appear to be close parallels between previous work and the dynamics of neonate patient transfers in both air can ground ambulances. As a result, the current proposal is aimed at continuing or completing some previous work; but importantly also extending it to other applications where operation of dynamic systems in motion environments is essential but hazardous. The time-dependence and nonlinearity of forces acting on these systems render traditional static, quasi-static, and frequency-domain approaches inadequate for understanding the true nature of the dynamic interfaces. Rigorous analysis relies on the fusion of principles from multibody dynamics, vehicle dynamics, structural analysis, transient computer simulation, statistical analysis, and aerodynamics. This continuing research programme is developing and validating computational tools and applying them to improve understanding of these complex dynamic systems. Categories of systems considered are rigid-body, flexible-body, and human biodynamic systems. The approach will remain consistent with recent work and continue to involve theoretical, computational, and experimental components. The proposed research is intended to contribute to improving the safety and operability of people and equipment operating in motion environments. Through training of HQP, engagement with the end-users of the research, open publication of research outcomes, and involvement with far-reaching organizations such as the International Working Group on Human Performance at Sea, efforts will continue to be made to maximize the positive impact of this research and maintain Canadian leadership in the areas of investigation.