A Method for Determining the Robust Stability Region of PID Parameters in Axial Magnetic Bearings

A technology of axial magnetic bearings and stable domains, which is applied to controllers with specific characteristics, electric controllers, etc., to achieve good control effects, good anti-interference performance, and good control performance

Active Publication Date: 2016-01-20
江阴智产汇知识产权运营有限公司
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Problems solved by technology

After retrieving related literature and patents at home and abroad, the robust stable domain of PID parameters determined by the D-segmentation method has never been applied in magnetic bearing control

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  • A Method for Determining the Robust Stability Region of PID Parameters in Axial Magnetic Bearings
  • A Method for Determining the Robust Stability Region of PID Parameters in Axial Magnetic Bearings
  • A Method for Determining the Robust Stability Region of PID Parameters in Axial Magnetic Bearings

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Embodiment Construction

[0021] see figure 1 Shown is the overall block diagram of the control system of the method for determining the robust stability domain of the axial magnetic bearing PID parameters in the present invention, the axial displacement of the axial magnetic bearing 5 is detected by the axial displacement detection circuit 6, and the axial displacement detection circuit 6 Output displacement output signal z , the displacement output signal z with a given reference position signal z ref Compare and get the deviation of the two e . The result of the deviation will be e by D - After the PID controller 2 processed by the split technology module 1 adjusts the output force signal F z To levitation force / current calculation 3, and then output current reference signal i ref , the signal i ref Output the control current via the power amplifier module 4 i z Drive the control coil of the axial magnetic bearing 5, thereby realizing the closed-loop control of the axial magnetic bear...

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Abstract

The invention discloses a method for determining a PID (proportion, integration and differentiation) parameter robust stable region of an axial magnetic bearing. The method comprises the following steps of selecting an additive uncertainty function by reflecting the difference between transfer functions of an actual control target of the axial magnetic bearing and a nominal model onto a bode diagram; selecting kd as any fixed value on the parameter robust stable region of a (kp, ki) plane, and analyzing from a singular boundary and a non-singular boundary; selecting ki as any fixed value of the parameter robust stable region of the plane, and analyzing from the non-singular boundary; determining the direction of the parameter robust stable region according to a Jacobian matrix value J; selecting kp as the fixed value of the parameter robust stable region of the plane, and analyzing from the non-singular boundary to obtain the boundary of the non-singular parameter robust stable region. The uncertainty of the actual control target can be automatically processed under the condition that a controller is not designed again, the optimal difference splitting is performed between the performance and the robustness, and a better control effect is achieved.

Description

technical field [0001] The invention relates to a method for accurately measuring the robust stable region of axial magnetic bearing PID parameters in the field of high-speed and high-precision motor transmission, which can be used in modern equipment such as artificial satellites and missiles, as well as high-performance flywheel energy storage, generators, artificial The invention relates to high-precision control of a heart pump, etc., and belongs to the technical fields of electric drive control equipment and mechanical lubrication and sealing. Background technique [0002] Compared with mechanical bearings, magnetic bearings have the advantages of high speed, no wear, long life, and no lubrication. Magnetic bearings are widely used in power transmission fields such as flywheel energy storage, high-speed high-precision motors, and artificial heart pumps, and are especially suitable for harsh environments such as high temperatures. The magnetic bearing is essentially an ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B11/42
Inventor 杨益飞朱熀秋冯冬梅
Owner 江阴智产汇知识产权运营有限公司
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