Dynamical system analysis for accelerating models in non-metricity <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="d1e1449" altimg="si214.svg"><mml:mrow><mml:mi>f</mml:mi><mml:mrow><mml:mo>(</mml:mo><mml:mi>Q</mml:mi><mml:mo>)</mml:mo></mml:mrow></mml:mrow></mml:math> gravity

Two accelerating cosmological models are presented in symmetric teleparallel $f(Q)$ gravity, $Q$ be the non-metricity. The constructed based on assumptions of two different functional forms and a dynamically changing nature deceleration parameter that shows transition at $t=2n\pm\sqrt{\frac{4n^2+1}{3}}$, $n$ being positive constant. In both models, equation state for dark energy gravity becomes dynamical quantity crosses phantom divide line. violation strong condition null late times also established. addition, system analysis has been performed three critical points each model identified. model, least one stable node observed. To strengthen further, stability using homogeneous linear perturbations to ensure models.