1) неустойчивость; потеря устойчивости; нарушение устойчивости
2) нестабильность
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- absolute instability
- aerodynamic instability
- aeroelastic instability
- amplitude instability
- baroclinic instability
- beam instability
- bench instability
- built-in instability
- chugging instability
- colloidal instability
- conditional instability
- convective instability
- crack instability
- decay instability
- dimensional instability
- directional instability
- drift instability
- dynamic instability
- ecosystem instability
- elastic instability
- excursive instability
- explosive instability
- frame instability
- frequency instability
- gain instability
- generator instability
- global instability
- gravitational instability
- heave instability
- image instability
- inherent instability
- jet stream-generated instability
- kinetic instability
- lateral instability
- lattice instability
- local instability
- longitudinal instability
- long-term instability
- loop instability
- mode instability
- multiphase sustained instability
- oscillator instability
- oscillatory instability
- overall instability
- parametric instability
- phase instability
- pitch instability
- plasma instability
- plasma-beam instability
- plastic instability
- pour instability
- rate instability
- relative instability
- rolling instability
- roll instability
- rotation instability
- self-excited instability
- shear instability
- shear-layer instability
- short-term instability
- static instability
- stochastic instability
- thermal instability
- time instability
- timing instability
- transient instability
- vibrational instability
- voltage-time instability
- voltage instability
- wavelength instability
- whirling instabilitys
- wriggle instability
- yaw instability