Simulations about reducing noise excited by engine revolution are done by laying secondary source at proper places on the simplified finite element model of a passenger car.
根据所得结论，在简化的客车有限元模型上的适当位置安放次级声源，对因发动机振动激励引起的噪声进行车内有源消声的仿真分析。
The utility model relates to a motorcycle speed-limiting device, comprising an engine revolution speed transducer (1), a driving speed transducer (2) and an ignition controller.
本实用新型涉及的摩托车限速装置，包括发动机转速传感器（1）、摩托车车速传感器（2）及点火控制器；
Engine revolution should not exceed the maximum permissible.
发动机的转数不应超过所允许的最大值。
Engine revolution should not exceed the maximum permissible.
发动机的转数不应超过所允许的最大值。
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