Master-slave multiprocessor real-time signal analyzing method
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A multi-processor, real-time signal technology, applied in the field of signal analysis, can solve problems such as difficulty in determining the value of the timing sampling period, inconsistent running time, etc.
Inactive Publication Date: 2013-04-03
HEFEI UNIV OF TECH
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[0007] Using the method of the first-order infinite impulse response (IIR) algorithm, the running time of each iteration may not be equal, and it is difficult to determine the value of the timing sampling period
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[0054] Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The signal analysis method of the present invention can be applied to analyze harmonics and inter-harmonics of a power system and vibration components of different frequencies of mechanical vibration.
[0055] figure 1 It is a connection diagram of the main processor and the slave processor adopted in the signal analysis method of the present invention, such as figure 1 As shown, the master processor and N slave processors communicate through a synchronous serial interface (SPI). Clock signal SCK, data output SDO and data input SDI form the SPI interface. After the signals S0~Sm of the main processor are decoded, they control the chip select signal CS of each slave processor. The status signals STS of the N slave processors are all output with open collectors, and are connected to the STS input of the main processor in a "wired-AND" manner, and ...
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Abstract
The invention discloses a master-slaver multiprocessor real-time signal analyzing method, which adopts a master processor and N slave processors to carry out, wherein the mater processor adopts T seconds as a sampling period for timely sampling a measured signal and obtaining the sampling data. An iterative method is utilized to directly obtain a direct-current component x0; the value of a positive integer k is set in N slaver processors, wherein the numerical values for setting N*K frequencies are gradually increased and are positive numbers not greater than 2*pi / T as follows: omega11, omega 12,..., omega 1K, omega 21,..., omega NK; the iterative method is utilized to obtain N*K alternating-current components of x11, x12,..., x1K, x21,..., and xNK, and N*K orthogonal components of z11, z12,..., z1k, z21,..., zNK; and N*K estimation amplitude values of a11, a12,..., a1K, a21,... and aNK are calculated. The master-slaver multiprocessor real-time signal analyzing method provided by the invention has a relatively simple algorithm structure, relatively small calculation amount and relatively short operation time.
Description
technical field [0001] The invention belongs to the technical field of signal analysis, and specifically relates to a method of using a main processor and multiple slave processors to decompose a signal into a DC component and multiple AC components of a specified frequency in real time, and obtain an orthogonal component of each AC component. and amplitude signal analysis methods. Background technique [0002] In engineering, it is often necessary to decompose signals such as voltage, current, sound, and vibration into DC components and multiple AC components of specified frequencies in real time, and calculate the value of the DC component and the amplitude of each AC component, such as the harmonics of the power system Interharmonic analysis and vibration component analysis of mechanical vibration, etc. [0003] For this reason, several signal analysis methods have been proposed in the prior art. Although good results are obtained, there are still some deficiencies, such...
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