Based on a series of signal process and noise source identification techniques, especially the major noise source identification methods, such as expurgation method, sound intensity analysis, spectrum analysis vibro-acoustic correlation analysis and so on, the pass-by noise control of SC7080A and SC6360B are studied in detail. By the roadway and dais experiments, the major noise and radiating parts are identified and some economical controlling methods are made. For the SC7080A, to control the emissing noise from the intake and shell vibration of air cleaner, a intake muffler is installed between the air cleaner and intake valve. Based on the theory of Helmholtz resonator, One three-parallel-connected resonant silencer is designed and trial-manufactured. For the SC6360B, the attenuation performance of exhaust muffler in high frequency region is improved. To reduce the vibration noise of shell part, the structure of oil sump tank, exhaust manifold shield and exhaust manifold shield are analyzed and improved. At the same time, some measures, such as sound absorption, sound insulation, are taken to reduce the noise of engine surface emissivity and a sound shield is designed.
本文首先综述了目前国内外汽车加速噪声控制的现状、主要方法和技术措施，在此基础上，结合SC7080A和SC6350B汽车的车外加速噪声水平及现状，综合运用分别运行法、声强法、频谱分析法、声振相干函数法等现代噪声源识别方法，对SC7080A和SC6360B汽车进行了准确详细的车外加速噪声源识别并提出了经济可行的控制方案，针对SC7080A，主要在空气滤清器和进气阀门之间的进气管道上加装进气消声器，抑制空气滤清器壳体表面和进气口两处的噪声辐射，根据Helmholtz共振腔原理设计了三腔并联旁支型共振消声器，并进行了工程化设计和试制；针对SC6360B，主要改善了排气消声器在高频段的消声性能，对罩壳类零件进行了结构改进，降低了其表面噪声的辐射，并对发动机舱进行了吸声、隔声处理，设计了发动机隔声罩。
Therefore, high efficiency can be achieved. The circuit parameters are decided according to the intrinsic impedance of the resonant tank. As the duty ratios of the active switches are fixed, the charging current should be programmed via tuning the circuit operation frequency and therefore the circuit impedance. The optimum operating point is sieved by the frequency response diagram to operate the charger at high efficiency.
至於并联负载电路参数的设计是以共振槽的特性阻抗为基准，调变切换频率并固定主动开关的责任周期，藉由频率的变化改变电路阻抗，以控制充电电流的大小，透过频率响应立体图，挑选适当的操作点，使共振式充电器运作於最佳状态，以获得高效率。
Then an improved design method of resonant tank combining first harmonic approximation and simulation in time domain was proposed.
基于所提出的方法设计的参数建立一台220 W的样机，实验结果证实了所提出改进型设计方法的正确性和可行性。
The inverter frequency is set to the tank's resonant共振 frequency, allowing the generation of very (high currents高安培电流) within the tank's coil.
逆变器的工作频率决定振荡器的振荡频率。振荡器的感应线圈会感应出非常大的电流。
A new contactless inductively coupled power transfer system was proposed in this paper. The primary coil was tuned with an inductor/capacitor/capacitor resonant tank, and the second coil was parallel tuned with a compensation capacitor.
提出一种新型无接触式感应耦合电能传输系统(inductively coupled power transfer，ICPT)，系统一次侧线圈与电感/电容/电容所组成的谐振槽谐振、二次侧线圈与补偿电容并联谐振。
There are altogether four passive components in the resonant tank: the series resonant inductor, the resonant capacitor, the parallel inductor and the transformer.
LLC谐振变流器谐振回路中的无源元件包括：串联谐振电感、谐振电容、并联电感和变压器。
In addition, the operation modes and dc characteristics are discussed for designing the resonant tank.
文中将会探讨LLC串联谐振式转换器的工作模式、交流与直流特性分析作为谐振电路的设计与元件选用。
A well designed resonant tank could improve the performance of LLC resonant converter.
在LLC谐振式变换器的设计中，谐振网络参数的设计对于变换器的性能具有重要影响。
Superior part-load efficiency is another virtue in the proposed system, for the input current of the resonant tank is decreased with the decrescence of load.
同时谐振槽输入电流随负载的减小而减小，提高系统的部分负载能效值。
Auxiliary resonant tank protected electronic ballasts for metal halide lamps
辅助谐振环保护的高强度气体放电灯电子镇流器
The new inverter circuit topology provides all the switches for turn-on and the auxiliary switches for turn-off at zero current switching (ZCS) by a resonant tank, so that the switching loss is reduced and system efficiency is improved.
利用串联谐振环节能实现所有开关的零电流开通和辅助开关的零电流关断，减小了开关损耗，提高了系统效率。