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Improved speed-limiting filtering method

A speed-limiting and filter technology, applied in impedance networks, digital technology networks, electrical components, etc., can solve problems such as inability to filter, feedback signal loss, etc., to achieve a small amount of software calculation, avoid feedback loss, real-time performance Good results

Inactive Publication Date: 2014-07-16
中国兵器工业第二0六研究所
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  • Application Information

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Problems solved by technology

[0011] The problem to be solved by the present invention is to solve the problem that if the speed limit threshold in the traditional speed limit filtering method is too large, the corresponding filtering effect will not be achieved, and if the selection is too small, useful signals may be filtered out, resulting in the loss of feedback signals. An improved rate-limiting filtering method based on

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Embodiment approach

[0034] The software of the present invention presses as figure 1 Process development, the implementation method is as follows:

[0035] The filtering program first checks the deviation threshold between the current feedback signal and the previous filter output signal and the number of times that the deviation between the current feedback signal and the previous filter output signal is allowed to be greater than the threshold value. According to the real-time nature of the system operation requirements, the length of the system control software cycle, and the actual dynamic performance requirements of the system are set. Then judge whether the signal received this time has received a valid feedback signal for the first time, if it is the first time to receive the signal, then use the signal received this time as the filter output; if it is not the first time to receive the signal, then calculate the received signal The deviation of the signal from the last filter output. Sec...

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Abstract

The invention discloses an improved speed-limiting filtering method, which is used for filtering digital feedback signals in an automatic control system. The method comprises the following steps of: comparing a feedback signal with a last filter output signal; performing speed-limited filter output to obtain a signal serving as the feedback signal of the application; and realizing the filtering of the feedback signal. In the method, the selection of a deviation threshold between the feedback signal and the last filter output signal can be less than a maximum deviation value which can be reached actually by a system as required without causing feedback loss caused by using a conventional small-threshold speed-limiting filtering method. Therefore, the method can not only effectively eliminate randomly interfered signals and distorted signals caused by the instability of a sensor, but also avoid the feedback loss caused by the conventional small-threshold speed-limiting filtering method. The method is simple and feasible, and has a small software calculation amount and high real-time performance.

Description

technical field [0001] The invention belongs to the technical field of computer control, and relates to an improved speed-limiting filtering method, which is used for filtering digital feedback signals in an automatic control system. Background technique [0002] The traditional speed-limiting filtering method is described in formula (1). [0003] Y n = x n | x n - x n - 1 | ≤ Δx y n - ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03H17/00
Inventor 曹福禄刘世挺孙向亮刘艳行李辉
Owner 中国兵器工业第二0六研究所