A Smoothing Digital Filtering Method for Continuous Corner Signals

A digital filtering, corner signal technology, applied in the direction of digital technology network, impedance network, electrical components, etc., to achieve the effect of simple and low cost

Active Publication Date: 2017-01-04
NAT UNIV OF DEFENSE TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the input signal u is a continuous rotation angle signal, there is a jump in the value of u at 0 / 360 or ±180
Although the signal value is discontinuous and jumps, the physical system is continuous rotation, so the result obtained by directly using the second-order low-pass digital filter of the prior art to filter the signal is wrong

Method used

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  • A Smoothing Digital Filtering Method for Continuous Corner Signals
  • A Smoothing Digital Filtering Method for Continuous Corner Signals
  • A Smoothing Digital Filtering Method for Continuous Corner Signals

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Embodiment Construction

[0038] see figure 1 , the implementation steps of the smoothing digital filtering method for continuous corner signals in this embodiment are as follows:

[0039] 1) Obtain the input value u to be filtered regularly, and jump to step 2) for each input value u at the current moment. In this embodiment, the subsequent processing of the input value u at the current moment is performed through the variable temp, so after obtaining the input value u to be filtered, it is necessary to assign the input value u to be filtered to the variable temp.

[0040] 2) Sum the absolute value of the input value u at the current moment and the absolute value of the output value y(k-1) at the previous moment to obtain the summation value |u|+|y(k-1)|, and judge the summation Whether the value is greater than 180 degrees (|u|+|y(k-1)|>180) and the sign of the input value at the current moment and the input value at the previous moment is opposite (u*y(k-1)<0) Whether it is true at the same time, ...

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Abstract

The invention discloses a smooth digital filtering method for continuous rotating angle signals. The method comprises the following implementation steps that firstly, whether the conditions that the summation value obtained through summing the absolute value of the input value at the current moment and the absolute value of the output value at the previous moment is greater than 180 degrees, and the symbols between the input value of the current moment and the input value of the previous moment are opposite are simultaneously realized or not are judged, if so, the input value of the current moment and the input value of the previous moment are subjected to judgment correcting processing, and if not, the output value of the previous moment is subjected to judgment correcting processing; the input value of the current moment is subjected to filtering according to the input value of the previous moment, and finally, a filtering structure is subjected to judgment correcting processing. The smooth digital filtering method can be applicable to the discontinuity problem in the continuous rotating angle signals, all operations can be respectively realized directly through software, and the smooth digital filtering method has the advantages that the continuous angle signal filtering output is accurate and stable without hopping, the realization is simple, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of filter processing of servo control signals, in particular to a smooth digital filter method for continuous corner signals. Background technique [0002] The function of the digital filter is to process the digital code of the input discrete signal to achieve the purpose of changing the signal spectrum. It has high precision and high reliability; it can be programmed to change characteristics or multiplex, and is easy to integrate. Processing, image signal processing, medical biological signal processing, servo control signal processing and other technical fields. Digital filters generally have low-pass, high-pass and band-pass types. Angle control is one of the common forms of servo control. The control system receives the angle command, and the driving object is positioned at the given angle. When the angle command and the angle sensor signal are disturbed, the command signal may have a large noise; w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03H17/02
Inventor 洪华杰范世珣张智永范大鹏张连超黑墨彭永华
Owner NAT UNIV OF DEFENSE TECH
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