Possible extensions to, and expansions upon, the research described in this thesis are:
• Application of the methodologies developed and validated to any of the wide range of MEMS devices whose vibrational and dynamic characteristics are important for predicting performance.
• Application of these methodologies to other sound and vibration sensing organs in insects, which occur in numerous forms, and whose dynamics may be of interest for a number of reasons.
• Extension of the methods validated for slender beams vibrating in one direction to two- and three-dimensional structures and motions would be possible given appro- priate excitation and response measurement systems.
• Optimization of excitation systems to match excitation bandwidth to the systems be- ing studied may give improved results for the structures considered herein. Most notably, there has been a report [39] of high frequency modes in the mechanosensory hairs of crickets, and a full modal analysis in a higher frequency range may prove to be of value.
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APPENDIX A. CODE FOR BASE EXCITATION AND PLOTTING 122
Appendix A
MATLAB Code Implementing the Base
Excitation Algorithm of B´eliveau, et al.,
Plus Additional Code For Plotting
Results
In this appendix, the code implementing the base excitation modal analysis algorithm devel- oped by B´eliveau, et al. [4], and discussed in detail in Chapter 3, is provided. The appendix also contains several functions created to automate plotting of results from both the base ex- citation code and from MACEC. The sections following contain data format conversion in Section A.1, modal parameter identification in Section A.2, and the creation of stabilization plots to identify stable modes in Section A.3.
A.1
Data Format Conversion
The following files convert STAR format uff files produced by the Polytec PSV software into the format required for identification. The commandreaduffis provided by the UFF reading and writing package [48], obtained from the MATLAB Central File Exchange.
The following subsections contain the code that loads the uff file produced by the Poly- tec Scanning Vibrometer software, and extracts the node positions, display information, and FRF data from it.