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RDPI modeling method for piezoelectric ceramic drive parts under variable load environment

A piezoelectric ceramic driving and modeling method technology, applied in the field of RDPI modeling, can solve the problems of complex input and output characteristics, increased driver positioning error, inability to characterize the rate-related and load-related characteristics of piezoelectric ceramic driving components, etc. Achieve the effect of high model accuracy, scientific and reasonable modeling method, and wide application range

Inactive Publication Date: 2019-05-17
SOUTH CHINA UNIV OF TECH
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  • Description
  • Claims
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Problems solved by technology

[0004] However, the input and output characteristics of piezoceramic drivers are more complex under load conditions
As the input signal frequency and load change, the hysteresis nonlinearity exhibited by the piezoelectric ceramic driver will become more obvious, showing rate-dependent and load-dependent characteristics, which will increase the positioning error of the driver and seriously affect the voltage. Real-time Applications of Electroceramic Actuators
Traditional hysteresis models, such as the classic Preisach model and PI model, can only characterize rate-independent hysteresis characteristics
There is currently no modeling method that can effectively characterize the rate-dependent and load-dependent properties of piezoceramic actuation components

Method used

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  • RDPI modeling method for piezoelectric ceramic drive parts under variable load environment
  • RDPI modeling method for piezoelectric ceramic drive parts under variable load environment
  • RDPI modeling method for piezoelectric ceramic drive parts under variable load environment

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Embodiment

[0038] This embodiment discloses a RDPI modeling method for piezoelectric ceramic driving components under variable load environments, including the following content:

[0039] 1) Loading system of piezoelectric ceramic drive components

[0040] In order to obtain the input and output characteristics of piezoceramic drive components at different input frequencies under variable load conditions, a piezoceramic drive load system was established. The load is a rigid module that is vertically loaded on the piezoelectric ceramic driving part, so that the output displacement of the driving part is consistent with the output displacement of the load, and is directly related to the load mass m, and its output displacement is obtained by a laser displacement sensor .

[0041] 2) Mathematical model of piezoelectric ceramic drive components with load

[0042] For the input and output characteristics of piezoelectric ceramic drive components with load, it is usually regarded as a series...

specific Embodiment

[0055] In order to obtain the input and output characteristics of the piezoelectric ceramic drive system with load, a set-up such as figure 2 The experimental platform is shown. In this embodiment, the driving signal of the driver is sent from the computer, and is output as an analog signal through D / A conversion, and then amplified by a voltage amplifier 10 times to obtain the driving voltage, which is loaded on the piezoelectric ceramic driver to generate an output displacement, and then The displacement is measured by the laser displacement sensor, and the obtained displacement data is an analog signal, which is also converted into a digital signal by A / D and transmitted to the computer for storage and data processing. In this way, the static test of the input and output characteristics of the piezoelectric ceramic band-load driver is completed. The input voltage is selected as V = 10sin (2πft), where f is the frequency of the input voltage signal, and the output load dis...

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Abstract

The invention discloses a RDPI modeling method for piezoelectric ceramic drive parts under a variable load environment. The RDPI modeling method is based on a RDPI model to carry out dynamic hysteresis modeling on a piezoelectric ceramic on-load driving system, and the modeling method capable of accurately describing characteristics of the piezoelectric ceramic drive parts under the variable loadenvironment. Based on input and output hysteresis characteristics of the piezoelectric ceramic drive parts, a RD-Play operator is reestablished by introducing a threshold function related to the inputfrequency and load into an original play operator, and a RDPI model is established based on the RD-Play operator. According to the RDPI modeling method for the piezoelectric ceramic drive parts underthe variable load environment, the established RDPI model can effectively reflect the dynamic characteristics caused by the changes of the input voltage frequency and the on-load quality in the piezoelectric ceramic drive parts, and the model is suitable for any driving voltage signal with changeable frequency.

Description

technical field [0001] The invention relates to the technical field of control engineering, in particular to an RDPI modeling method for piezoelectric ceramic drive components under variable load environments. Background technique [0002] Piezoelectric ceramic actuators are made by using the piezoelectric effect of piezoelectric ceramic materials, and the materials are deformed by applying an excitation voltage. It is an ideal driving element in the current micro-displacement drive technology. It has high positioning accuracy, large driving force, and fast response. Fast and other advantages. However, in practical applications, due to its own hysteresis nonlinear characteristics, the positioning accuracy is greatly reduced, which has a serious impact on the application of piezoelectric ceramic actuators, so it has become a problem that we need to solve urgently. [0003] In order to effectively characterize its complex hysteresis nonlinear characteristics, scientists have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
Inventor 冯颖胡泽东杨辰光哈桑.阿巴斯张野晨
Owner SOUTH CHINA UNIV OF TECH
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