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在国家“六五”科技攻关项目“机器噪声源识别技术的研究”中,我们采用PRIN-80计算机的扩展BASIC系统,编制了汽车车外最大加速噪声谱分析应用软件及发动机外部噪声源识别的平板理想化法应用软件。汽车噪声是城市噪声的主要组成部分,我国标准GB1495-79和GB1496-79对机动车辆的最大加速噪声规定了严格的限值,对测定方法也作了详细而具体的规定。由于加速噪声是一个瞬变数值,因此,对它必须采用动态分析技术,试验时用调频磁带机记录汽车两侧的噪声信号,发动机的转速信号,汽车在测量区内某点的位置信号及工况说明。最大加速噪声谱分析应用软件包括标准谱程序MASXX(见图),发动机噪声分离程序HESXXS,轮胎噪声分离程序PASXX。标准谱程序是分析用
In the “Sixth Five-Year” scientific and technological project “Research on machine noise source identification technology”, we use the extended BASIC system of PRIN-80 computer to compile the application software of maximum acceleration noise spectrum analysis outside the car and the recognition of external noise source of the engine Tablet idealization method application software. Car noise is the main component of urban noise. China’s standards GB1495-79 and GB1496-79 set strict limits on the maximum acceleration noise of motor vehicles. The measurement methods are also detailed and specific. As the acceleration noise is a transient value, it must be dynamic analysis of its technology, the test drive with FM tape recorder on both sides of the noise signal, the engine speed signal, the car at a certain point in the measurement area of the signal and the work Situation description. The maximum acceleration noise spectrum analysis application software includes the standard spectrum program MASXX (see picture), the engine noise separation program HESXXS, the tire noise separation program PASXX. Standard spectrum program is for analysis