DIGITAL FILTER DESIGN
Compare Digital Filters by Minimizing Sum Square Error
The Digital Filter Design program presents a method to compare desired and designed digital filters by minimizing the sum-square-error of the differences in magnitude and phase angles. Most filter design techniques emphasize magnitude characteristics. Such techniques are adequate for control systems where the phase angle of a filter imposes minor effects on system stability. However, for closed loop feedback control systems, an excessive phase angle of a designed filter may create signal distortion or push the system to instability. This Digital Filter Design program has been applied to the Space Shuttle pitch body bending filter, where the filter was reshaped to provide more attenuation to flexible vehicle resonance modes without sacrificing the rigid vehicle performance.
Program Size: 1,336 Statements
Computer Language: FORTRAN IV
Copyright (c) 1996 Pacific HiTech, Inc. and COSMIC 
