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An elliptical track error control system for a non-resonant evc device

An elliptical trajectory, error control technology, applied in general control systems, control/regulation systems, program control, etc., can solve the problems of poor adjustability and single form, and achieve the effect of low cost and simple structure

Active Publication Date: 2021-02-05
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0010] In the prior art, the sliding mode adaptive or fuzzy PID control method can only make the device output a high-precision elliptical vibration trajectory at a fixed frequency value, which has a single form and poor adjustability

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  • An elliptical track error control system for a non-resonant evc device
  • An elliptical track error control system for a non-resonant evc device
  • An elliptical track error control system for a non-resonant evc device

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Embodiment Construction

[0056] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0057] Such as figure 2 As shown, an elliptical trajectory error control system of a non-resonant EVC device includes a PI inverse model that adjusts the input voltage and outputs an adjusted voltage, and a piezoelectric ceramic transducer whose signal input terminal communicates with the signal output terminal of the PI inverse model , after adjusting the voltage into the piezoelectric ceramic transducer, the displacement error of the elliptical trajectory can be reduced.

[0058] Since the static PI model can only describe the hysteresis phenomenon when the piezoelectric ceramic transducer is static (0-1Hz), the application improves the static PI model to obtain a rate-dependent PI model so that it can describe the phe...

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Abstract

The invention provides an elliptical trajectory error control system of a non-resonant EVC device, which includes a PI inverse model for adjusting the input voltage and outputting an adjusted voltage, and a piezoelectric ceramic transducer whose signal input terminal is connected to the signal output terminal of the PI inverse model for communication. After adjusting the voltage into the piezoelectric ceramic transducer, the displacement error of the elliptical trajectory can be reduced. The advantage of the elliptical trajectory error control system of the non-resonant EVC device provided by the present invention is that the non-resonant EVC device can output an elliptical trajectory with flexible adjustment of axis length and inclination under different operating frequencies, and realize precise control of the elliptical trajectory; PI inverse The model can accurately describe the dynamic hysteresis characteristics of each axial piezoelectric ceramic transducer in a non-resonant EVC device, and can be widely used in the case of piezoelectric ceramic transducers applied to a non-resonant EVC device.

Description

technical field [0001] The invention relates to the technical field of numerical control machining, in particular to an ellipse track error control system of a non-resonant EVC device. Background technique [0002] With the rapid development of precision and ultra-precision machining technology, elliptical vibration cutting has been widely concerned because of its advantages of reducing cutting force, suppressing workpiece burrs, improving machining quality, and increasing tool life. The elliptical vibration cutting (EVC) is realized by the EVC device. Currently, according to the working form of the EVC device, it can be divided into a non-resonant EVC device and a resonant EVC device. Compared with the resonant EVC device, the non-resonant EVC device has the advantages of adjustable operating frequency, flexible adjustment of the axis length and inclination angle of the generated ellipse trajectory, and is more suitable for precision machining of complex free-form surfaces ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/18
CPCG05B19/182G05B2219/34128G05B2219/34158
Inventor 张臣栾博
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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