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Method and device for acquiring S-shaped curve of numerical control system

A numerical control system and curve technology, applied in the direction of digital control, electrical program control, etc., can solve problems such as the speed and length are too large, and the influence of speed and length calculation errors

Active Publication Date: 2013-05-01
BEIJING A&E TECH
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Problems solved by technology

When calculating the length of the curve corresponding to this period of time, it is actually carried out according to the jerk, so the calculated speed and length will be too large, which will cause errors in the calculation of the speed and length of the subsequent time period

Method used

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  • Method and device for acquiring S-shaped curve of numerical control system
  • Method and device for acquiring S-shaped curve of numerical control system
  • Method and device for acquiring S-shaped curve of numerical control system

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Embodiment Construction

[0082] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the implementation manners in the present invention, all other implementation manners obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0083] see figure 1 , the present invention obtains the method for the S-curve of numerical control system one embodiment comprises the following steps:

[0084] Step S101: rounding the original time length to obtain the rounded time length;

[0085] The original time length of each time period of the S-shaped curve of the numerical control system is rounded to obtain the corresponding rounded time length of each time peri...

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Abstract

The embodiment of the invention discloses a method for acquiring an S-shaped curve of a numerical control system. The method comprises the following steps of: rounding the original time span of each time interval of the S-shaped curve of the numerical control system to obtain a corresponding rounded time span of each time interval; obtaining the maximum acceleration, maximum deceleration, maximum jerk and target speed of the S-shaped curve according to the rounded time span of each time interval; obtaining a curve length which corresponds to each time interval according to the rounded time span of each time interval, the maximum acceleration, the maximum deceleration, the maximum jerk and the target speed; and obtaining the displacement of the S-shaped curve which corresponds to the time point of the S-shaped curve according to the curve length which corresponds to each time interval to complete planning of the S-shaped curve. The embodiment of the invention further discloses a device for acquiring the S-shaped curve of the numerical control system. Through the way, the calculation accuracy of acceleration and deceleration planning can be increased, and the problem of shaking in a machining process is solved.

Description

technical field [0001] The invention relates to the field of numerical control systems, in particular to a method and device for obtaining an S-curve of a numerical control system. Background technique [0002] In the numerical control system, in order to ensure that the machine tool does not produce impact, out of step, overtravel or vibration when it starts and stops or transitions between two curve segments, it is necessary to perform curve acceleration and deceleration control, that is, to use a special acceleration and deceleration control planning algorithm, so that the motor The input of the machine changes according to certain rules, and it can quickly and accurately locate in various processing situations. In the prior art, in the acceleration and deceleration planning of the S-curve, the S-curve is divided into seven time periods, and the length of each time period is calculated according to parameters such as the maximum acceleration of the system to complete the ...

Claims

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Application Information

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IPC IPC(8): G05B19/18
Inventor 陈晓颖郭涛
Owner BEIJING A&E TECH
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