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Frequency-weighting filter selection, for h2 control of microgravity isolation systems: a consideration of the "implicit frequency weighting" problem
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Hampton, Roy David Whorton, Mark S. |
| Copyright Year | 1999 |
| Description | Many space-science experiments need an active isolation system to provide them with the requisite microgravity environment. The isolation systems planned for use with the International Space Station (ISS) have been appropriately modeled using relative position, relative velocity, and acceleration states. In theory, frequency-weighting design filters can be applied to these state-space models, in order to develop optimal H2 or mixed-norm controllers with desired stability and performance characteristics. In practice, however, since there is a kinematic relationship among the various states, any frequency weighting applied to one state will implicitly weight other states. These implicit frequency-weighting effects must be considered, for intelligent frequency-weighting filter assignment. This paper suggests a rational approach to the assignment of frequency-weighting design filters, in the presence of the kinematic coupling among states that exists in the microgravity vibration isolation problem. |
| File Size | 824435 |
| Page Count | 18 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20000067686 |
| Archival Resource Key | ark:/13960/t3sv2hz0w |
| Language | English |
| Publisher Date | 1999-01-01 |
| Access Restriction | Open |
| Subject Keyword | Space Processing Degrees of Freedom Hydrogen Vibration Isolators Spaceborne Experiments Bandpass Filters Frequencies International Space Station Kinematics Mathematical Models Microgravity Weighting Functions Matrices Mathematics H-2 Control Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
