Nonlinear parametrically excited vibration and active control of gear pair system with time-varying characteristic

Liu Shuang^a),^b), Wang Jin-Jin†^a), Liu Jin-Jie^a), Li Ya-Qian^a),^b)

Time history, phase diagram, and Poincare section in frequency band 5 ( ω = 1.75, 1.8, 2).