- divergent instability
- divergent instability exists at a pre-scribed trim if any small temporary disturbance or control input causes an ever-increasing vehicle response without oscillation. Note: divergent instability may be illustrated by operation above the critical speed of an oversteer vehicle. Any input to the steering wheel will place the vehicle in a turn of ever-decreasing radius unless the driver makes compensating motions of the wheel to maintain general equilibrium. This condition represents divergent instability. A linear mathematical analog of a vehicle is divergently unstable when its characteristic equation has any positive real roots.
Mechanics glossary. 2013.
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