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Concepts for a theoretical and experimental study of lifting rotor random loads and vibrations (identification of lifting rotor system parameters from transient response data), phase 7-b
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Hohenemser, K. H. Prelewicz, D. A. |
| Copyright Year | 1973 |
| Description | System identification methods have been applied to rotorcraft to estimate stability derivatives from transient flight control response data. While these applications assumed a linear constant coefficient representation of the rotorcraft, the computer experiments used transient responses in flap-bending and torsion of a rotor blade at high advance ratio which is a rapidly time varying periodic system. It was found that a simple system identification method applying a linear sequential estimator also called least square estimator or equation of motion estimator, is suitable for this periodic system and can be used directly if only the acceleration data are noise polluted. In the case of noise being present also in the state variable data the direct application of the estimator gave poor results. |
| File Size | 799112 |
| Page Count | 40 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19740006645 |
| Archival Resource Key | ark:/13960/t6g20rn41 |
| Language | English |
| Publisher Date | 1973-06-01 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Lifting Rotors Aerodynamic Configurations Data Acquisition Rotor Aerodynamics Rotor Blades Aerodynamic Forces Aerodynamic Characteristics Flapping Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
