One of the key problems in the nonlinear theory of the hydrodynamic stability is to determine the law of the evolution of the disturbancevelocity amplitude.
求解扰动速度幅值的演化规律,是流动稳定性非线性理论的关键问题之一。
2
Disturbance degree of the apparent phase velocity increases with decrease of frequency until a maximum one occurs.
表观相速度扰动程度随频率减小而增加,直至出现大扰动。
3
A finite dimensional repetitive control method is proposed for the high precision velocity control of servomechanisms subject to significant nonlinear disturbance torque.