A double-closed-loop control system and method for a single-degree-of-freedom magnetic-fluid double-suspension bearing
A double-closed-loop control and suspension bearing technology, applied in the field of control, can solve the problems of exceeding relevant hardware, insufficient anti-interference ability, current control signal stability and high anti-interference ability, etc.
Active Publication Date: 2020-01-31
YANSHAN UNIV
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Therefore, the stability and anti-interference ability of the current control signal are high. The anti-interference ability of the traditional single closed-loop control system is insufficient, and the error of the system is often eliminated through a large feedback gain, which makes the control current signal susceptible to external interference. Interference and may exceed the carrying capacity of related hardware (electromagnetic coils, power amplifier modules), resulting in the burning of related hardware such as electromagnetic coils
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[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0027] The purpose of the present invention is to provide a double-closed-loop control system and method for single-degree-of-freedom magnetic-fluid double-suspension bearings. The double-closed-loop control system is adopted, the outer ring ensures the position accuracy of the rotor and the resultant electromagnetic force is equal to the resultant force of the static pressure support, and the inner ring ensures that the magnetic fluid The double suspension bea...
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The invention discloses a double-closed-loop control system and method of a magnetic liquid double-suspension bearing with single freedom degree. According to the system, a differential displacement detection module detects offset of a rotor of the magnetic liquid double-suspension bearing, converts the offset into analog voltage and outputs the analog voltage to a position control module, and theposition control module compares the analog voltage with reference voltage and outputs control current based on the voltage difference. The differential displacement detection module is used for detecting coil current of the magnetic liquid double-suspension bearing. A current control module is used for outputting driving current based on the control current and the coil current. A power amplification module is connected with the current control module and the magnetic liquid double-suspension bearing separately to adjust the driving current and drive an electromagnetic coil of the magnetic liquid double-suspension bearing through the well adjusted driving current. The double-closed-loop control system is adopted, an outer ring guarantees position accuracy of the rotor and equality between the electromagnetic force and the static pressure support force. An inner ring guarantees good control current of the control system of the magnetic liquid double-suspension bearing.
Description
technical field [0001] The invention relates to the technical field of control, in particular to a double-closed-loop control system and method for a single-degree-of-freedom magnetic fluid double-suspension bearing. Background technique [0002] The magnetic fluid double suspension bearing is supported by electromagnetic force and static pressure support force. It is a new type of non-mechanical contact bearing. It has the advantages of no friction, no wear, large bearing capacity, high motion precision and long service life. Therefore, the stability and anti-interference ability of the current control signal are high. The anti-interference ability of the traditional single closed-loop control system is insufficient, and the error of the system is often eliminated through a large feedback gain, which makes the control current signal susceptible to external interference. Interference and may exceed the carrying capacity of related hardware (electromagnetic coils, power ampli...
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IPC IPC(8): F16C32/04F16C32/06
CPCF16C32/0451F16C32/06
Inventor 赵建华陈涛闫伟东张国基曹俊波幸岚春
Owner YANSHAN UNIV