And the first order approximate solution in the cases of hardexcitation and soft excitation and the frequency resonance equation in the case of resonance are given.
给出了其在硬激励和软激励情况下的一阶近似解和共振情况下的频率响应方程。
2
The characteristic due to hard or soft stiffness may be altered as the parameters of damping, foundation, and excitation on the system are varied.
In this paper, effects of hard lim it of the excitation and the loop of power system stabilizer PSS to the system oscillatory instability and chaos are studied.