The equivalent viscous damping ratio and the equivalent natural frequency are obtained by comparing the system with a purely linear, spring-mass-damper system of single freedom.
通过和单自由度线性弹簧-质量-阻尼系统进行比较，得到该带裂缝梁结构的等效自然频率和等效粘滞阻尼比。
Not new, but the subject of much controversy in Germany, the damper takes the form of a free-moving mass inside a vertical spring.
虽然不算是新闻，但在德国站比赛中引起较多争议的是减震器的使用，其结构是在垂直的弹簧中间加入减震块。
The output direct feedback controller design and simulation results of a nonlinear mass-spring-damper mechanical system show that these methods are effective.
通过对一个非线性质量块-弹簧-阻尼器系统输出反馈控制器的设计和计算机仿真，验证了方法的有效性。
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