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- Synchronous rectification produces a ripple frequency twice that of the excitation frequency and thus is easier to remove with a lowpass filter. 同步稳压产生两倍激励频率纹波频率,因此更容易被低通滤波器去除。
- The results indicate that the shroud bend works better than the mid-span shroud when the excitation frequency is lower than twice of the first eigenfrequency. 数值结果表明:当激振力频率低于两倍固有频率时,叶顶处的阻尼结构减振效果要优于凸肩阻尼结构;
- The control object is the total acoustic power level of net power flow input to the main system in whole excitation frequency band. An optimum design method of Multiple Dynamic Vibra - tion Absorbers(MDVA)is studied. 本文以简支薄板为主振系统,对其附加复式动力吸振器,提出以输入系统的净功率流在整个激励频带内的总声功率级为控制量的优化设计方法。
- Acording to the relationship between the natural frequency and the excitation frequency, those corresponding modes mostly close to the excitation frequency can be selected automatically. 该方法可根据激振力频率与基系统固有频率集的关系,自动选择最接近激振力频率的相应模态个数。
- The excitation frequencies of all simple and combinational instability regions shifted because of the mode variations with increasing ply-angle of the composite plates. 随复材板叠层数目增加,各单频与混频不稳定区之激发频率往高频处偏移,且各不稳定区激发频率之间距亦增加。
- Cropping mechanism is a key component for variant frequency vibration cropping,and its excited frequency directly affects manufacturing quality and production efficiency. 变频振动下料机构是变频振动系统的重要执行部件,其激振频率直接影响制造质量和生产效率。
- The critical speed which causes sympathetic vibration is gained by solution of excited frequency so that the resonance vibration of system can be avoided effectively. 通过对激振频率的求解,得到引起链传动系统共振的临界转速,从而有效地避开共振。
- The results show that the excitation frequencies of all simple and combinational instability regions shifted to lower frequencies with increasing delaminated width in composite plates. 实验中之激振力是非接触式之横向电磁力,且此电磁激振器之激发频率与激发振幅可由交流电源控制器控制,所以此种激振器可以避免实验中因轴向施力可能产生的干扰问题。
- Investigations were conducted by varying the parameters of the ultrasonic excition frequency,the porosity of cancellous bones and the characteristic size of the trabeculae,respectively. 分析结果表明:由于散射而引起的衰减占松质骨中总的超声衰减的26%25左右;
- Perhaps his nerve is naturally too dull to admit of any excitation. 大概他的神经天生就很迟钝以至不容有任何刺激的余地。
- The method can be applied when the size of hull grillage beam and exciting frequencies cannot be easily changed. 该法适用于船体板架尺寸、激励频率不易改变的调频情况。
- He varied the transmission frequency. 他变换了无线电传送的频率。
- A unit of frequency equal to one cycle per second. 赫兹频率的单位,等于每秒一周
- In this paper, HBM method and numerical method are utilized to study a mechanical system with clearance. According to the analysis, it is found that some peaks exist in some frequencies which are odd times of the exciting frequency. 用谐波平衡方法和数值积分方法 ,分析了受单频激励的含间隙机械系统的动力学响应 ,发现在频域中存在多个峰值 ,其对应的频率值为激励频率的奇数倍。
- Fatal accidents have decreased in frequency over recent years. 近年来死亡事故发生的频率已经下降。
- A Kind of Large Wind Power Generator with a. C. Excitation Frequency Control Has Been Researched Successfully 我国自行研制成功交流励磁变频调速的大型风力发电机
- AC excitation is a good solution to this problem. 交流励磁是一种好解法对这个问题。
- We can often correlate age with frequency of illness. 年龄的大小往往与发病率有关。
- Perhaps his nerves were naturally too dull to admit of any excitation. 大概他的神经天生就很迟钝以至不容有任何刺激的余地。
- Accidents on that highway are happening with increasing frequency. 那条高速公路上车祸发生得越来越频繁。