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Significant Contributions
The following list represents the contributions by the UC-SDRL to the area of structural dynamics:
| 1963 | Use of swept sine frequency response analysis equipment in the study of machine tool structures |
| 1965-68 | Air Force machine tool studies |
| 1967 | First modal parameter estimation algorithm for generating modal information from frequency response functions, assuming a proportional damping model |
| 1969 | Digital Fourier analysis used to measure frequency response functions through impulse excitation |
| 1970 | Modal parameter estimation algorithm for non-proportional damping model |
| 1971 | Acoustic signature analysis of castings |
| 1972 | Animation of modal vectors |
| 1973 | Development of color display subsystem for data presentation: Waterfall diagram, voice print, sound pressure level mapping, color animated mode shape movies (color gradation used as third dimension) |
| 1974 | Development of the complex exponential algorithm for real time modal parameter estimation from frequency response functions |
| 1975 | Modal analysis software including data management and interactive analysis |
| 1975 | Modal parameter estimation algorithm for multiple frequency response functions (Least Squares Complex Exponential Algorithm) |
| 1975 | Experimental modal analysis review (literature and interviews) |
| 1980 | Development of Modal Assurance Criterion for correlation of independent modal vector estimates (Little MAC and Big MAC) |
| 1980 | Development of dual input, random excitation frequency response function estimation |
| 1981 | Development of experimental modal analysis technique based upon an intermediate estimate of mass, stiffness, and damping matrices |
| 1983 | Development of multiple channel random noise source hardware |
| 1983 | Development of multiple channel signal conditioning hardware (auto-ranging amplifier/filter) |
| 1985 | Development of Multi-Mac modal parameter estimation algorithm |
| 1985 | Development of Polyreference Frequency Domain (PFD) modal parameter estimation algorithm |
| 1986 | Development of Multiple Reference Ibrahim Time Domain (MRITD) modal parameter estimation algorithm |
| 1987 | Development of new spatial domain modal parameter estimation algorithm, Complex Mode Indicator Function (CMIF) method |
| 1988 | Development of Unix Modal Program. |
| 1990 | Development of spatial sine testing hardware, software and parameter estimation algorithms. |
| 1990 | Calculation of modal filters from experimentally measured data. |
| 1991 | Development of the "U-Vector" impedance modeling method. |
| 1991 | Development of the Pertubated Boundary Condition (PBC) test method. |
| 1992 | Development of the Unified Matrix Polynomial (UMPA) Approach to a common formulation of modal parameter estimation methods. |
| 1993 | Development and implementation of Modal Filter Based active vibration control methods for complex structures. |
| 1994 | Development of the "X-Modal" Matlab based, graphical user interface (GUI) modal parameter estimation software for the HP-UX operating system. |
| 1997 | Development of the Matlab interface to "Plug N Play" drivers for HP/Agilent 143x VXI hardware. |
| 1997 | Development of Kalman filter computed order tracking software. |
| 1997 | Development of Matlab based Nearfield Acoustic Holography (NAH) software. |
| 1998 | Development of the "X-ACQuisition" Matlab based data acqusition software for HP/Agilent 143x VXI hardware. |
| 1999 | Development of the "X-Modal II" Matlab based, graphical user interface (GUI) modal parameter estimation software for PC and UNIX operating systems. |
| 2000 | Development of Non-Linear Polynomial Modeling of Multiple Input, Multiple Output (MIMO) Experimental Data |
| 2002 | Developed 6 DOF Load Cell and Calibration Methods for 6 DOF Loads (Rigid Body Assumption) |
| 2004 | Developed Experimental Inertia Estimation Method Based upon 6 DOF Interface Loads and Externally Applied Forces and Associated Accelerations (Rigid Body Assumption) |
| 2006 | Developed Identification Methods for Reduced Order Non-Linear Models from Experimental MIMO Data |
| 2007 | Developed MIMO Transmissability and MIMO Group Transmissability for Evaluating Structural Integrity |
| 2008 | Integrated Operational Modal Analysis into the Unified Matrix Polynomial Approach (UMPA) Framework |