Piezoelectric ceramic actuator control method based on particle swarm algorithm

A particle swarm algorithm and piezoelectric ceramic technology, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve the difficulty in meeting the accuracy requirements and the difficult calculation of the inverse model , unfavorable precision control and other issues, to achieve the effect of eliminating hysteresis characteristics, simplifying the optimal control problem, and reducing the amount of calculation

Active Publication Date: 2018-10-23
GUANGDONG UNIV OF TECH
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Problems solved by technology

However, it is very difficult to establish a correct inverse model and the amount of calculation is large, which is not conducive to the control of precision, and it is difficult to meet the precision requirements

Method used

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  • Piezoelectric ceramic actuator control method based on particle swarm algorithm
  • Piezoelectric ceramic actuator control method based on particle swarm algorithm
  • Piezoelectric ceramic actuator control method based on particle swarm algorithm

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Embodiment

[0053] Please refer to figure 1 , a piezoelectric ceramic actuator control method based on a particle swarm algorithm, comprising the following steps:

[0054] S1. The piezoelectric ceramic driver is mathematically modeled with the electromechanical coupling nonlinear total parameter dynamic model, and the dynamic model of the piezoelectric ceramic driver is obtained as:

[0055]

[0056]

[0057] Where x is the actual output displacement, y is the expected displacement, u is the control variable, u T is the transposition matrix of u, Q and R are weight matrices, q is the linear partial charge of the total charge flowing through the nonlinear hysteretic sub-model, w is the input voltage of the nonlinear hysteretic sub-model, b is the damping coefficient, and k is Spring stiffness, m is the equivalent mass of the piezoelectric stack, T 1 , T 2 , T 3 , S 1 、C 1 、C 2 and C 3 are constant coefficients, T 4 is the proportional coefficient of the electro-mechanical conv...

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Abstract

Provided by the invention is a piezoelectric ceramic actuator control method based on a particle swarm algorithm. The method comprises: S1, mathematic modeling is carried out on a piezoelectric ceramic actuator by using an electromechanical coupling nonlinear total parameter dynamical model to obtain a dynamical model of the piezoelectric ceramic actuator; S2, on the basis of a pseudo-spectral method, the dynamical model of the piezoelectric ceramic actuator is processed discretely and an optimal control problem is transformed into a nonlinear planning problem; S3, a fitness function of the particle swarm algorithm is obtained based on the nonlinear planning problem; and S4, the fitness function is solved by using the particle swarm algorithm to obtain a global optimal solution. Therefore,the hysteresis characteristic of the piezoelectric ceramic actuator is eliminated and the positioning accuracy of the piezoelectric ceramic actuator is improved.

Description

technical field [0001] The invention relates to the technical field of piezoelectric actuator control, in particular to a piezoelectric ceramic actuator control method based on particle swarm algorithm. Background technique [0002] Piezoelectric ceramic driver is one of the important components in the field of precision positioning and precision manufacturing technology. It has the advantages of fast response, high resolution, rigid headlight, and no heat, no magnetic interference, no noise, and easy to control. It is an ideal driver. Positioning devices are widely used in precision manufacturing. However, due to its own physical properties with hysteresis, creep, vibration and other nonlinear characteristics, it will have a certain impact on the precision positioning accuracy in practical applications. At present, there are many models for controlling piezoelectric ceramic actuators at home and abroad, such as Preisach model, Maxwell model, Prandtle-Ishlinskii model and s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/00
CPCH02N2/0075
Inventor 李星科陈学松张丽丽蔡述庭
Owner GUANGDONG UNIV OF TECH
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