Abstract
Methodologies are presented for the analysis and design of stability augmentation control laws for aircraft in which "hard" displacement and rate limiting are significant. Candidate control laws are derived using the linearquadratic (LQ) regulator. Analytical and computational estimates of the stability limits imposed by control saturation are presented using state trajectories, as well as describing functions and eigenvalue computation. Analysis also includes an investigation of the interaction of the state-space saturation and stability boundaries for various choices of LQ weighting matrices. For minimum energy control, the saturation and stability boundaries are shown to be parallel. In this case, there is a direct relation between the solution to the matrix Riccati equation and the aircraft's open-loop dynamics.
Original language | English (US) |
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Pages (from-to) | 197-205 |
Number of pages | 9 |
Journal | Journal of Guidance, Control, and Dynamics |
Volume | 7 |
Issue number | 2 |
DOIs | |
State | Published - 1984 |
All Science Journal Classification (ASJC) codes
- Aerospace Engineering
- Applied Mathematics
- Electrical and Electronic Engineering
- Control and Systems Engineering
- Space and Planetary Science