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Microgravity vibration isolation: optimal preview and feedback control
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Hampton, R. D. Allaire, P. E. Lewis, D. W. Grodsinsky, C. M. Knospe, C. R. |
| Copyright Year | 1992 |
| Description | In order to achieve adequate low-frequency vibration isolation for certain space experiments an active control is needed, due to inherent passive-isolator limitations. Proposed here are five possible state-space models for a one-dimensional vibration isolation system with a quadratic performance index. The five models are subsets of a general set of nonhomogeneous state space equations which includes disturbance terms. An optimal control is determined, using a differential equations approach, for this class of problems. This control is expressed in terms of constant, Linear Quadratic Regulator (LQR) feedback gains and constant feedforward (preview) gains. The gains can be easily determined numerically. They result in a robust controller and offers substantial improvements over a control that uses standard LQR feedback alone. |
| File Size | 606862 |
| Page Count | 24 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19920021448 |
| Archival Resource Key | ark:/13960/t6k120j00 |
| Language | English |
| Publisher Date | 1992-05-01 |
| Access Restriction | Open |
| Subject Keyword | Controllers Equations of State Vibration Isolators Optimal Control Differential Equations Spaceborne Experiments Feedforward Control Feedback Control Low Frequencies Microgravity Linear Quadratic Regulator Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
