Dynamic stability of a translating vehicle with a simple sling load

Autor:	Eugene M. Cliff, David B. Bailey
Rok vydání:	1975
Předmět:	Engineering Mathematical model business.industry Longitudinal static stability Aerospace Engineering Perturbation (astronomy) Mechanics Critical value Instability Critical length Nonlinear system Control theory business Ballistic coefficient
Zdroj:	Journal of Aircraft. 12:773-777
ISSN:	1533-3868 0021-8669
DOI:	10.2514/3.44492
Popis:	A system consisting of helicopter with a singly tethered load is modeled as two particles connected by an inextensible link. The nonlinear equations of motion are linearized about a steady level flight condition, and it is shown that the perturbation equations separate into longitudinal and lateral/directional sets. For some selected parameter values, the modes are extracted and interpreted. Generally, instability will arise if the mass of the load is greater than the mass of the helicopter, or, if the tether length exceeds a critical value. Typically, this critical length is far in excess of reasonable values.
Databáze:	OpenAIRE
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