Dynamic Experimental Testing

发动机和子系统测试是严格的，并且是交付成功验证产品的必要条件。改进的保真度模拟大大减少了所需的物理测试量。在物理测试中，更有效地利用设备可以达到两个关键目的：降低成本和开辟了解系统动力学的途径。传统实验活动的基石是“稳态”测试。例如，具有较大热质量的设施可能需要时间来稳定到足够稳定的状态，并且需要大量的测试点来表征整个操作空间的性能。当使用运行成本高的设备时，动态测试方法可以通过不等待“稳定状态”来减少测试时间——如果稳定状态真的可以实现的话。此外，使用被测系统的降阶动态模型允许动态表征，这在稳态方法中是不可能的。总体目标是确定昂贵的物理测试是否可以以更低的成本更快地完成，同时仍然提供相同的（如果不是改进的话）动态系统理解。

Engine and subsystem testing is rigorous and necessary for delivery of successful validated products. Improved fidelity simulations have reduced the quantity of physical testing needed significantly. In what remains necessary of physical testing, more efficient use of facilities can be made for two key purposes: reduced cost and, opening routes to understand system dynamics.Cornerstone to conventional experimental campaigns is 'steady state' testing. Facilities with large thermal mass (for example) can take time to settle to sufficiently steady state and large numbers of test points are required to characterise the performance in the full operating space. When utilising facilities with high running costs, then a dynamic testing approach could reduce testing time by not waiting for 'steady state' - if steady state can ever be truly achieved. Moreover, using reduced order dynamic models of the system under test allows dynamic characterisation that is not possible in a steady-state approach.The overarching aim is to determine if expensive physical testing can be done more quickly at lower cost while still delivering the same, if not improved, dynamic system understanding.