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Improving stability margins in discrete-time lqg controllers
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Oranc, B. Tarik Phillips, Charles L. |
| Copyright Year | 1987 |
| Description | Some of the problems are discussed which are encountered in the design of discrete-time stochastic controllers for problems that may adequately be described by the Linear Quadratic Gaussian (LQG) assumptions; namely, the problems of obtaining acceptable relative stability, robustness, and disturbance rejection properties. A dynamic compensator is proposed to replace the optimal full state feedback regulator gains at steady state, provided that all states are measurable. The compensator increases the stability margins at the plant input, which may possibly be inadequate in practical applications. Though the optimal regulator has desirable properties the observer based controller as implemented with a Kalman filter, in a noisy environment, has inadequate stability margins. The proposed compensator is designed to match the return difference matrix at the plant input to that of the optimal regulator while maintaining the optimality of the state estimates as directed by the measurement noise characteristics. |
| File Size | 520822 |
| Page Count | 17 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19870013286 |
| Archival Resource Key | ark:/13960/t7cs0q80b |
| Language | English |
| Publisher Date | 1987-04-01 |
| Access Restriction | Open |
| Subject Keyword | Numerical Analysis Linear Quadratic Gaussian Control Control Systems Design Stochastic Processes White Noise Control Stability Feedback Control Kalman Filters Steady State Compensators 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 | Article |
