THE DESIGN AND ANALYSIS OF EXPERIMENTS. By Oscar Kempthorne. New York, John Wiley and Sons, Inc., 1952. 631 pp. $8.50. This book by a teacher of statistics (as well as a consultant for \"experimenters\") is a comprehensive study of the philosophical background for the statistical design of experiment. It is necessary to have some facility with algebraic notation and manipulation to be able to use the volume intelligently. The problems are presented from the theoretical point of view, without such practical examples as would be helpful for those not acquainted with mathematics. The mathematical justification for the techniques is given. As a somewhat advanced treatment of the design and analysis of experiments, this volume will be interesting and helpful for many who approach statistics theoretically as well as practically. With emphasis on the \"why,\" and with description given broadly, the author relates the subject matter to the general theory of statistics and to the general problem of experimental inference. MARGARET J. ROBERTSON

The Design and Analysis of Experiments

Fault detection, isolation, and reconfiguration (FDIR) is an important and challenging problem in many engineering applications and continues to be an active area of research in the control community. This paper presents a survey of the various model-based FDIR methods developed in the last decade. In the paper, the FDIR problem is divided into the fault detection and isolation (FDI) step, and the controller reconfiguration step. For FDI, we discuss various model-based techniques to generate residuals that are robust to noise, unknown disturbance, and model uncertainties, as well as various statistical techniques of testing the residuals for abrupt changes (or faults). We then discuss various techniques of implementing reconfigurable control strategy in response to faults.

A Survey of Fault Detection, Isolation, and Reconfiguration Methods

Past, present and future of nonlinear system identification in structural dynamics

Technology developments in structural health monitoring of large-scale bridges

https://people.duke.edu/~hpgavin/SystemID/References/Markovsky+VanHuffel-SP-2007.pdf

Overview of total least-squares methods

In the process of the structural integrity and launch-environment survivability assessment of satellite structures, dynamic mathematical models are used for load prediction. These analytical models need to be test-verified. Therefore, it is of vital importance to correlate the Finite Element model with experimental vibration data and to further fine-tune and update the model. Classically, the modal test is performed in the laboratory. Frequency response functions are measured and fed into a conventional modal analysis package in order to estimate eigenfrequencies, damping ratios, mode shapes and participation factors. Once the analytical model is test verified and the component loads have been estimated, the satellite equipment is subjected to shaker tests with various shaker levels to ensure their structural integrity and launch survivability. This paper investigates the possibilities to integrate both the modal survey and the qualification test. The issue is complicated by the fact that during the qualification test only response data are measured while the actual loading conditions are unknown. Therefore, operational modal analysis has to be applied to the output-only data. A test structure was subjected to a typical vibration qualification test. The results obtained with operational modal analysis are compared with the results of a traditional input-output modal analysis.

The integration of operational modal analysis in vibration qualification testing

In the context of the European co-operative research project ASANCA II. methods for deriving a global vibro-acoustical model of the aircraft fuselage-cabin cavity system are investigated. Firstly, an extensive experimental study was performed on a trimmed SAAB 340 test section. A full frequency response function matrix was measured between a large number of structural and acoustical degrees of freedom. Based on these data, a non-parametric (vibro-acoustical principal field shape) system model was identified. Furthermore, a full FE model was derived for the SAAB 340 acoustic test section. First a model of the fuselage structure was formed and evaluated by means of eigenvalue analysis. Based on prior test results this model was updated. The remaining parts of the fuselage section, containing the cabin air cavity, trim panels and the material between the cabin structure and trim panels, was formed into a second model. This model was also analysed by means of eigenvalues followed by connecting the two (sub-) models, by means of modal coupling, to form the complete description of the cabin section. For this model, the frequency response functions were evaluated at the nodes corresponding to the experimental analysis. Finally, a correlation analysis between the FE and the test model was performed. Hereto, direct FRF correlation between the FE and test models, as well as a correlation of the principal field shapes corresponding to both data sets was executed.

Correlation of medium frequency test and fe models for a trimmed aircraft test section

Advances in Industrial Modal Analysis

Nowadays, simulation tools cannot describe architectural variability. As such, they are mostly only used during the later stages of the design, when the architecture has already been fixed. This paper demonstrates how simulation tools can still be used in the early stages of physical system design before the system architecture is fixed, by using automatic generation of simulation models.The paper classifies the approaches to automatically generate and execute simulation models according to different criteria and explains how one can choose a suitable approach given particular criteria. Additionally, it describes some best practices for using simulation tools within optimization loops.

Herman Van der Auweraer

Papers

The integration of operational modal analysis in vibration qualification testing

Correlation of medium frequency test and fe models for a trimmed aircraft test section

Advances in Industrial Modal Analysis

Automatic generation of simulation models for early stage evaluation of physical system topologies (WIP)

Active vibration control of an automotive firewall for interior noise reduction