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Gradient power amplifier based on adaptive predictive control and design method thereof

A technology for power amplifiers and self-adaptive prediction, applied in the direction of power amplifiers, etc., can solve the problems of slow response speed and low precision of current output, and achieve the effect of broadening application scenarios and improving control effects

Active Publication Date: 2021-07-13
CHONGQING UNIV
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  • Application Information

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Problems solved by technology

It can realize the fast and high-precision current output of the gradient power amplifier, solve the problem of slow response speed and low precision of the current output of the gradient power amplifier, and effectively improve the output current accuracy and response speed of the gradient power amplifier. Resonance imaging system needs to realize adaptive parameter adjustment to match with system parameters to achieve optimal control

Method used

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  • Gradient power amplifier based on adaptive predictive control and design method thereof
  • Gradient power amplifier based on adaptive predictive control and design method thereof
  • Gradient power amplifier based on adaptive predictive control and design method thereof

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Embodiment Construction

[0059] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic concept of the present invention, and the following embodiments and the features in the embodiments can be combined with each other in the case of no conflict.

[0060] Wherein, the accompanying drawings are for illustrative purposes only, and represent only schematic diagrams, rather than physical drawings, and should...

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Abstract

The invention relates to a gradient power amplifier based on adaptive predictive control and a design method thereof, and belongs to the field of electronic circuits. A gradient power amplifier device based on self-adaptive predictive control mainly comprises a four-bridge-arm power circuit and a fast feedback predictive circuit. The microprocessor adjusts PID control parameters to be optimal by adjusting a digital potentiometer in a PID circuit according to a response curve output by the gradient power amplifier, and calculates a system output response time constant tau; the microprocessor realizes matching of a prediction coefficient and a system output response time constant tau by adjusting the resistance value of a digital potentiometer in the rapid prediction circuit; and then the rapid prediction circuit is cascaded with the PID circuit, so adaptive parameter matching of the gradient power amplifier in different application scenes and rapid prediction control of output signals of the control circuit are realized, and the output response speed and precision of the gradient power amplifier are improved.

Description

technical field [0001] The invention belongs to the field of electronic circuits, and relates to a gradient power amplifier based on adaptive predictive control and a design method thereof. Background technique [0002] As the core component of the MRI system, the gradient amplifier receives the gradient signals output by the spectrometer in the three directions of the X-axis, Y-axis, and Z-axis with a certain time sequence for power amplification, and generates corresponding spatial encoding gradients in space through the gradient coil drive current. The magnetic field realizes the spatial positioning of the imaging voxel. The gradient amplifier generates a changing gradient magnetic field around the gradient coil through the changing current. The ultimate goal of the gradient amplifier is to provide a high-performance gradient magnetic field for MRI. The development of gradient technology can effectively improve the imaging speed and quality. The maximum value that the gr...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/20
CPCH03F3/20
Inventor 王平田训柳学功李锡涛王慧悦梁家祺武超阎鑫龙李倩文陈靖翰
Owner CHONGQING UNIV
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