文中使用的计算程序通用性强。可用于任何矿用空压机设备吸气管道系统结构固有频率计算。
The computer program has common property, and can be used to calculate all of the structural inherent frequencies of the mining reciprocating air compressor equipment's suction pipe system.
文中介绍了系统的特点，列举了串联谐振中各频率特性的计算公式及程序框图。
The Character of the system, the calculative formula of the frequences as well as flow chart of program have been presented in this paper.
实验结果证明基于DSP的DPLL完全可以胜任超音频的频率跟踪，系统硬件电路可靠，程序运行良好。
The experimental results indicate the circuit is credible and the program runs well. The DPLL based on DSP is competent for ultra-audio frequency-tracking.
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