Principal resonance response of a stochastic elastic impact oscillator under nonlinear delayed state feedback*
Huang Dong-Meia),b), Xu Weia)†, Xie Wen-Xiana),b), Han Quna)
       
Mean square responses versus excitation frequency for : (a) τ = π /2; (b) τ = 3 π /4 (sold lines: analytical results; circles: numerical results).