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Method for post-processing measured data by using scrolling smoothing filtering

A technology of measuring data and smoothing filtering, applied in the direction of digital technology network, impedance network, electrical components, etc., can solve the problem that the filtering parameters are not easy to change, can not be filtered, etc. Effect

Active Publication Date: 2015-06-10
四川泛华航空仪表电器有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of the hardware filter is that the filtering parameters are not easy to change, it cannot filter signals with high or low frequency, and there is an impedance matching problem

Method used

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  • Method for post-processing measured data by using scrolling smoothing filtering
  • Method for post-processing measured data by using scrolling smoothing filtering
  • Method for post-processing measured data by using scrolling smoothing filtering

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Embodiment Construction

[0012] see figure 1 . In the digital software filter, there are filter queue address 1, filter queue length setting unit 2, filter limit 3, filter upper limit 4, filter lower limit 5, sampling value 6 and filter output value 7. The filter queue address 1 defines the storage start position of the sampling data, the filter queue length setting unit 2 defines the response speed of the filter, the filter limit 3 defines the value of the coarse error, the filter upper limit 4 and the filter lower limit 5 define the filter response Speed, the sample value 6 defines the input interface of the sample data, and the filter output value 7 defines the output interface of the filter. It works by first using Δ limit Remove obvious false data; then use Δ upper and Δ lower Perform reliability analysis on the sampled data; finally perform queue filling and K averages, where Δ limit Sampling value S for oil quantity i Valid range for positive values, Δ upper and Δ lower are the upper an...

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Abstract

The invention discloses a method for post-processing measured data by using scrolling smoothing filtering. The method is independent of hardware and high in reliability, and filtering characteristics are conveniently modified. The technical scheme comprises the following steps of: setting a scrolling smoothing digital software filter for post-processing a fuel quantity signal, wherein a filtering queue address (1), a filtering queue length setting unit (2), a filtering limit (3), an upper filtering limit (4), a lower filtering limit (5), a sampled value (6) and a filtering output value (7) are set in the digital software filter; refusing obviously false data by utilizing Deltalimit; performing reliability analysis on sampled data by utilizing Deltaupper and Deltalower; and performing queue filling, and performing averaging for K times. The scrolling smoothing filter for post-processing the fuel quantity signal is implemented by a software algorithm, and the fuel quantity signal is smoothed by a digital filtering method, so that fuel level fluctuation errors are eliminated, and the shortcomings of fuel quantity measurement errors caused by maneuver flight are overcome.

Description

technical field [0001] The invention relates to a post-processing method mainly applied to aircraft fuel quantity signals. Background technique [0002] The current digital fuel oil measurement system based on computer technology has greatly improved the accuracy of fuel quantity measurement, but it has brought about the problem of poor measurement stability. In practical applications, the output fuel quantity data will fluctuate frequently, and even output fuel quantity data that is far from the actual situation, which has seriously affected the correct judgment of the pilot on the working state of the aircraft. The prior art generally adopts a hardware filter method to perform front-end processing on the analog fuel quantity data measurement signal at the front-end of the measurement component. The disadvantage of the hardware filter is that the filtering parameters are not easy to change, it cannot filter signals with high or low frequency, and there is an impedance matc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03H17/02
Inventor 林波
Owner 四川泛华航空仪表电器有限公司
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