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Intelligent correction rapid PCM decoding calculation method

A calculation method and fast technology, applied in special data processing applications, file/folder operations, file systems, etc., can solve problems that affect test flight efficiency, increase test flight risk, increase difficulty of data analysis, etc., to ensure data security Effect

Pending Publication Date: 2021-02-19
CHINA HELICOPTER RES & DEV INST
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there is no intelligent algorithm for decoding flight test data, and traditional tools need to be manually operated to locate and intercept the interference in PCM data, which takes a long time and is not accurate enough. The difficulty of data analysis increases, and even seriously affects the efficiency of test flight, increasing the risk of test flight

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  • Intelligent correction rapid PCM decoding calculation method
  • Intelligent correction rapid PCM decoding calculation method
  • Intelligent correction rapid PCM decoding calculation method

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Experimental program
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Embodiment Construction

[0051] A fast PCM decoding calculation method for intelligent correction, comprising the following steps:

[0052] In order to ensure multi-threaded calculation, the data needs to be divided into blocks, and multiple processes are formed in the program. In order to ensure that the frame is not lost at the block and the most effective, the size of the divided data is F=2* according to the number of blocks. (N-1)+M / Q, where the frame length is N bytes, the data size is M bytes, and the number of blocks is Q.

[0053] See block diagram figure 1 , where S1, S2... represents the beginning of each block; E1, E2... represents the end of each block. Among them, S1 to E1 represent the first block, S2 to E2 represent the second block, and so on for subsequent blocks.

[0054] Configuration file for reading raw PCM data. Including reading the name of each channel, the channel sampling rate, the subframe where the channel data is located and the offset position in the subframe and othe...

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Abstract

The invention belongs to the field of helicopter flight tests, and discloses an intelligent correction rapid PCM decoding calculation method. According to a PCM data principle, a frame structure of PCM data is determined by a user, is stored in Data Flow in an XLG file, and comprises a word length, a sub-frame length, a main frame length, a synchronization word value and the position of a frame corresponding to each data word, so that normal PCM decoding is carried out. At present, in order to increase the decoding speed, an original code file is divided into a plurality of blocks according tothe number of blocks input by a user; a plurality of threads are started to decode each block, and a result is stored in a hard disk; after all the blocks are decoded and corrected, decoding resultsof all the blocks are combined, and decoding is completed.

Description

technical field [0001] The invention belongs to the field of helicopter flight tests, in particular to an intelligently corrected fast PCM decoding calculation method. Background technique [0002] At present, the helicopter flight test system collects and records most of the data in the PCM data storage format. The PCM data frame is a data frame format that can be customized by the user. The data acquisition device fills the data frame with data according to the defined frame format. The data recording device Record the data frame and save it on the storage device, and finally import the stored PCM data information into the computer and extract it into an engineering physical quantity. We are used to calling it PCM decoding. With the development of scientific research models, the test data is getting bigger and bigger. The test environment is becoming more and more complex, the decoding speed is getting slower and slower, and the original data mixed with various interferenc...

Claims

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Application Information

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IPC IPC(8): G06F16/16
CPCG06F16/16
Inventor 罗毅邵景斌李杰李凯叶新苗
Owner CHINA HELICOPTER RES & DEV INST
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