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Ultrahigh pressure water jet velocity optimal control method extracted based on voice characteristics

A sound feature and optimized control technology, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve the problems of low efficiency, difficult to meet the requirements of flexible manufacturing high smoothness adaptive control, etc., to reduce labor intensity , strong practicability, and the effect of improving work efficiency

Inactive Publication Date: 2012-09-19
JIANGSU UNIV +1
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AI Technical Summary

Problems solved by technology

[0004] The existing ultra-high pressure water jet speed control is still in the simple manual experience control, and the efficiency is low. By manually setting the maximum and minimum speed in the numerical control system, and performing hard switching according to the linear deceleration method, it is difficult to meet the high smoothness of flexible manufacturing. Adaptive Control Requirements

Method used

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  • Ultrahigh pressure water jet velocity optimal control method extracted based on voice characteristics
  • Ultrahigh pressure water jet velocity optimal control method extracted based on voice characteristics
  • Ultrahigh pressure water jet velocity optimal control method extracted based on voice characteristics

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Embodiment Construction

[0016] see figure 1 , first set up the sound signal computer acquisition and control system on the existing ultra-high pressure water jet cutting machine, the existing ultra-high pressure water jet cutting machine includes booster pump system 1, sand adding part 2 and water jet nozzle 3, processing workpiece 4 Fixed on the workbench 5, the sound signal computer acquisition and control system is composed of a sound sensor 6, a sound signal transmission line 7, a signal amplification conditioning module 8 and a computer system 9 connected in series in sequence, wherein the sound sensor 6 is arranged on the workpiece 4, Multiple acoustic sensors 6 can be used with the present invention.

[0017] see figure 2 , the computer system 9 is based on TMS320DM642 DSP as the core sound acquisition computer system, the signal amplification and conditioning module 8 adopts the AWA14604 type preamplifier to form the front-end test unit, and sends it to the computer I / O interface through th...

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Abstract

The invention discloses an ultrahigh pressure water jet velocity optimal control method extracted based on voice characteristics. A plurality of background noise signals are collected before a workpiece is cut, time domain characteristics and frequency domain characteristics are obtained through analysis, orthogonal wavelet decomposition of five scales is carried out on respective discrete series of selected N group water jet cutting field voice signals, approximate reflection voice signals are obtained, and amplitude envelope is determined; corresponding water jet cutting starting time and water jet cutting stopping time are obtained to obtain cutting time and calculate signal energy; the cutting time and the signal energy serve as input quantity, and optimum nozzle sidesway velocity is obtained though manual experience to serve as output quantity to build a least square support vector machine model; when the workpiece is cut, cutting field voice signals are collected on line, the cutting time and the signal energy are extracted to be input in the least square support vector machine model, the optimum nozzle sidesway velocity is obtained, and work efficiency of water jet cutting and quality of cut products are improved.

Description

technical field [0001] The invention relates to ultra-high pressure water jet cutting technology, in particular to an ultra-high pressure water jet speed optimization control method. Background technique [0002] The ultra-high pressure water jet cutting machine has the advantages of no chemical change, no thermal deformation, narrow slit, high precision, smooth cut surface, clean and pollution-free during the cutting process. With the rapid development of high technology, the water jet cutting machine tends to become more complex Therefore, how to improve the smoothness and cutting efficiency of cutting products is the main research on the optimal control of ultra-high pressure water jet cutting. content. [0003] The water jet cutting smoothness is affected by the basic theory of water jet The process parameters mainly include: nozzle moving speed , water pressure ,flow , nozzle structure parameters (inner diameter, aspect ratio, material, shape), target distance ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24C5/04G05B13/02
Inventor 张军赵德安孙月平陈波李雪峰
Owner JIANGSU UNIV
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