Abstract
In engineering design, an issue for using complex simulation models in system analysis are unknown causes for dynamic system behavior, which make parameterization difficult. This paper presents a case study in which a structured system analysis is used for the parameterization of complex dynamic multi-domain models. The dynamic system behavior of an impact wrench during fastening of a bolt is analyzed and modeled using the Contact and Channel Approach for structured parameterization of a multibody simulation model. This qualitative model building serves as a basis for a simulation model that quantifies the relations of design parameters and system behavior. Comparison with experimental test results is done as a validation. With this approach, the behavior identified in the simulation model could be traced back in a structured way to its cause in the system embodiment. The simulation model represented the real dynamic system behavior with an initial sufficient precision, but showed a lack of precision in detail. On this basis, the Contact and Channel Model was extended by adding additional statistical behavior of the system. Parameters of the system embodiment were identified qualitatively to improve the simulation model. A limitation in qualitative modeling of dynamic changes in the system has been identified that needs to be addressed in further research.
Highlights
In engineering design, modeling of the dynamic behavior of a product or its subsystems is often necessary to understand and optimize the product
The following chapters describe qualitative modeling from its basis in the preliminary study to the definition of states, function-relevant elements, and parameters in the C&C2-Sequence model. This model is validated by parameter identification in a simulation model, where assumptions from the model are checked for their quantitative influence on the system behavior
It shows the main channel and support structure and the working surface pairs, which are crucial for interactions in the hammer mechanism
Summary
In engineering design, modeling of the dynamic behavior of a product or its subsystems is often necessary to understand and optimize the product. Modeling languages like SimscapeTM or Modelica® are commonly used to conveniently model complex physical systems throughout various domains as lumped-parameter models. These quantitative models usually rely on the system structure and on the experience of design engineers. Identification of the cause for a certain characteristics of the impact is not in focus of the product architecture model. This detailed embodiment function relation (EFR) is difficult to capture, as it describes the connection between the specific products’ embodiment (including known and unknown parameters) and its abstract functions (including behavior). It is unclear why the torque of the impact wrench has a large
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
