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A method for landing gear modeling and simulation with experimental validation
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Daniels, James N. |
| Copyright Year | 1996 |
| Description | This document presents an approach for modeling and simulating landing gear systems. Specifically, a nonlinear model of an A-6 Intruder Main Gear is developed, simulated, and validated against static and dynamic test data. This model includes nonlinear effects such as a polytropic gas model, velocity squared damping, a geometry governed model for the discharge coefficients, stick-slip friction effects and a nonlinear tire spring and damping model. An Adams-Moulton predictor corrector was used to integrate the equations of motion until a discontinuity caused by a stick-slip friction model was reached, at which point, a Runga-Kutta routine integrated past the discontinuity and returned the problem solution back to the predictor corrector. Run times of this software are around 2 mins. per 1 sec. of simulation under dynamic circumstances. To validate the model, engineers at the Aircraft Landing Dynamics facilities at NASA Langley Research Center installed one A-6 main gear on a drop carriage and used a hydraulic shaker table to provide simulated runway inputs to the gear. Model parameters were tuned to produce excellent agreement for many cases. |
| File Size | 3736153 |
| Page Count | 100 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19960049759 |
| Archival Resource Key | ark:/13960/t6q004n80 |
| Language | English |
| Publisher Date | 1996-06-01 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Design, Testing And Performance Vibration Aircraft Landing Landing Loads A-6 Aircraft Computerized Simulation Equations of Motion Coefficients Static Tests Aircraft Models Dynamic Tests Vibration Damping Landing Simulation Landing Gear Nonlinearity Tires Landing Speed 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 |
