On-line testing shows that, this digital ultrasonic peening power supply based on DSP can make the system work at the resonance state, and the peening process is stable.
联机试验表明，本文研制的基于DSP的数字化超声冲击电源可以使系统工作在谐振状态，冲击过程稳定。
2
In concurrence with the exhaust system resonance occurs at certain engine rotating speed during testing, the noise level of engine will substantially increase.
内燃机排气系噪声试验中，在某种转速下，排气系发生共振，从而使发动机噪声大大增加。
3
The principle and method of testing oil body humidity are discussed, according to the changed trait in resonance frequency and quality factor of resonance cavity when microwave acting on oil body.