Loading...
Please wait, while we are loading the content...
Similar Documents
Peak-seeking optimization of trim for reduced fuel consumption: architecture and performance predictions
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Brown, Nelson A. Schaefer, Jacob |
| Copyright Year | 2013 |
| Description | A peak-seeking control approach for real-time trim configuration optimization for reduced fuel consumption has been developed by researchers at the National Aeronautics and Space Administration (NASA) Dryden Flight Research Center to address the goals of the NASA Environmentally Responsible Aviation project to reduce fuel burn and emissions. The peak-seeking control approach is based on a steepest-descent algorithm using a time-varying Kalman filter to estimate the gradient of a performance function of fuel flow versus control surface positions. In real-time operation, deflections of symmetric ailerons, trailing-edge flaps, and leading-edge flaps of an F/A-18 airplane (McDonnell Douglas, now The Boeing Company, Chicago, Illinois) are controlled for optimization of fuel flow. This paper presents the design and integration of this peak-seeking controller on a modified NASA F/A-18 airplane with research flight control computers. A research flight was performed to collect data to build a realistic model of the performance function and characterize measurement noise. This model was then implemented into a nonlinear six-degree-of-freedom F/A-18 simulation along with the peak-seeking control algorithm. With the goal of eventual flight tests, the algorithm was first evaluated in the improved simulation environment. Results from the simulation predict good convergence on minimum fuel flow with a 2.5-percent reduction in fuel flow relative to the baseline trim of the aircraft. |
| File Size | 782473 |
| Page Count | 15 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20140008319 |
| Archival Resource Key | ark:/13960/t5gb73d1q |
| Language | English |
| Publisher Date | 2013-08-19 |
| Access Restriction | Open |
| Subject Keyword | Performance Optimization Trim Optimization Peak Seeking Flight Tests Algorithms Simulation Control Surfaces Performance Prediction Fuel Consumption F-18 Aircraft Trailing Edge Flaps Flight Control Kalman Filters Optimization Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
