Setting up finite element model of small spacecraft based on vibration test results

The paper presents a procedure for automated setup of finite element models based on vibration test results. It shows typical responses of the model and the test unit, which, based on the results of their comparison, are used for setting up the model. It presents algorithms for computing coefficients, which represent results of comparing responses from both individual sensors and the totality of measurement points. It discusses possible classes of variable parameters for setting up the model, as well as certain aspects of selecting these parameters. Using a small spacecraft as an example, it shows how the procedure works. A comparison of the automated model setting up against the “manual” method produced a result which gives grounds for talking about improved convergence of model responses for certain measurement points. The paper provides recommendations on how the presented procedure for setting up finite element models could be further improved.