The design of shimmy free nose landing gear is complicated by the action of the gear hydraulic steering system. During shimmy the steering system pressure response results in loads on the gear which are highly nonlinear functions of gear motion. In order to obviate the need for extensive numerical work to analyze gear stability, we have need the describing function method to linearize the steering system response, enabling the stability to be analyzed using linear system techniques. Application of this approach to a representative nose gear/steering system showed the limit cycle amplitudes and stability boundaries of the shimmy motion to be in good agreement with results obtained numerically; the transient response was also predicted reasonably well. (Wassmann)
Describing function analysis of nonlinear nose gear shimmy
Beschreibende Funktionsanalyse des nichtlinearen Flatterns des Bugfahrwerks
ASME-Papers ; 1-9
1981
9 Seiten, 10 Bilder, 1 Tabelle, 10 Quellen
Conference paper
English
Aircraft Nose Gear Shimmy Studies
SAE Technical Papers | 1993
|Aircraft nose gear shimmy studies
NTRS | 1993
|Small-size nose landing gear integrated with shimmy damping function
European Patent Office | 2024
|