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Predicting the effects of unmodeled dynamics on an aircraft flight control system design using eigenspace assignment
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Davidson, John B. Johnson, Eric N. Murphy, Patrick C. |
| Copyright Year | 1994 |
| Description | When using eigenspace assignment to design an aircraft flight control system, one must first develop a model of the plant. Certain questions arise when creating this model as to which dynamics of the plant need to be included in the model and which dynamics can be left out or approximated. The answers to these questions are important because a poor choice can lead to closed-loop dynamics that are unpredicted by the design model. To alleviate this problem, a method has been developed for predicting the effect of not including certain dynamics in the design model on the final closed-loop eigenspace. This development provides insight as to which characteristics of unmodeled dynamics will ultimately affect the closed-loop rigid-body dynamics. What results from this insight is a guide for eigenstructure control law designers to aid them in determining which dynamics need or do not need to be included and a new way to include these dynamics in the flight control system design model to achieve a required accuracy in the closed-loop rigid-body dynamics. The method is illustrated for a lateral-directional flight control system design using eigenspace assignment for the NASA High Alpha Research Vehicle (HARV). |
| File Size | 1785874 |
| Page Count | 44 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19940032551 |
| Archival Resource Key | ark:/13960/t6qz75c7n |
| Language | English |
| Publisher Date | 1994-06-01 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Stability And Control Aircraft Models Rigid Structures Control Systems Design Research Aircraft Dynamic Models Eigenvectors Mathematical Models Control Theory Feedback Control Flight Control Lateral Control Aircraft Control 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 |
