Robust Control and Fidelity Assessment of Real-Time Hybrid Substructuring of Contact Problems

接触问题实时混合子结构的鲁棒控制和保真度评估

• 批准号: 450801414
• 负责人: Professor Dr. Daniel J. Rixen
• 金额: --
• 依托单位: Lehrstuhl für Angewandte Mechanik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2020
• 资助国家: 德国
• 起止时间: 2019-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/450801414?language=en
• 关键词: Robust; Control; Fidelity; Assessment; Real

Real-Time Hybrid Substructuring (RTHS, also often referred to as Hardware-in-the-Loop on mechanical level) is a method to test critical components under realistic conditions. The dynamical system with which the critical component interacts is simulated numerically while the component itself is tested on the test bench. Force and displacement information are exchanged between the component on the test bench and the remaining system in the numerical simulation in real-time. The goal is to emulate the dynamics of the overall dynamical system. This research project deals with method development for RTHS to achieve two main goals: Firstly, the existing control methods will be expanded such that engineering applications with contact can be tested. RTHS is prone to instability as the actuator moving the experimental part introduces its own dynamics. Existing methods in RTHS can not cope with mechanical contact, as the system properties of the dynamical system under test change rapidly at the moment of contact. Secondly, the fidelity of RTHS tests needs to be assessed. When performing RTHS tests, a reference dynamic behavior of the full dynamical system is not available and thus it is not straightforward to determine how well the RTHS test replicates the true dynamic behavior. Using the measurement data from the coupling procedure, a fidelity assessment will be set up.

实时混合子结构（RTHS，通常也称为机械级硬件在环）是一种在现实条件下测试关键组件的方法。关键部件相互作用的动力学系统进行了数值模拟，而组件本身在测试台上进行测试。力和位移信息在试验台上的部件和数值模拟中的其余系统之间实时交换。目标是仿真整个动态系统的动态。本研究项目涉及RTHS的方法开发，以实现两个主要目标：首先，现有的控制方法将被扩展，以便可以测试接触的工程应用。RTHS容易不稳定，因为移动实验部件的致动器引入了其自身的动力学。现有的RTHS方法不能科普机械接触，因为被测动力系统的系统属性在接触时刻迅速变化。第二，须评估即时房屋策略测试的准确性。当执行RTHS测试时，完整动态系统的参考动态行为不可用，因此不能直接确定RTHS测试复制真实动态行为的程度。使用耦合程序的测量数据，将建立保真度评估。