WO2015035836A1 - 磁悬浮系统的轴控制方法和装置 - Google Patents
磁悬浮系统的轴控制方法和装置 Download PDFInfo
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- WO2015035836A1 WO2015035836A1 PCT/CN2014/083592 CN2014083592W WO2015035836A1 WO 2015035836 A1 WO2015035836 A1 WO 2015035836A1 CN 2014083592 W CN2014083592 W CN 2014083592W WO 2015035836 A1 WO2015035836 A1 WO 2015035836A1
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- Prior art keywords
- displacement
- shaft
- vortex
- magnetic levitation
- whirl
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 49
- 239000000725 suspension Substances 0.000 title abstract description 6
- 238000006073 displacement reaction Methods 0.000 claims abstract description 351
- 238000005339 levitation Methods 0.000 claims description 79
- 238000000926 separation method Methods 0.000 claims description 22
- 238000004364 calculation method Methods 0.000 claims description 13
- 238000013519 translation Methods 0.000 claims description 11
- 230000033001 locomotion Effects 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 8
- 230000008569 process Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 101100190466 Caenorhabditis elegans pid-3 gene Proteins 0.000 description 1
- 101000609957 Homo sapiens PTB-containing, cubilin and LRP1-interacting protein Proteins 0.000 description 1
- 101150109471 PID2 gene Proteins 0.000 description 1
- 102100039157 PTB-containing, cubilin and LRP1-interacting protein Human genes 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0444—Details of devices to control the actuation of the electromagnets
- F16C32/0451—Details of controllers, i.e. the units determining the power to be supplied, e.g. comparing elements, feedback arrangements with P.I.D. control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0474—Active magnetic bearings for rotary movement
- F16C32/048—Active magnetic bearings for rotary movement with active support of two degrees of freedom, e.g. radial magnetic bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0474—Active magnetic bearings for rotary movement
- F16C32/0487—Active magnetic bearings for rotary movement with active support of four degrees of freedom
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B6/00—Internal feedback arrangements for obtaining particular characteristics, e.g. proportional, integral or differential
- G05B6/02—Internal feedback arrangements for obtaining particular characteristics, e.g. proportional, integral or differential electric
Definitions
- the present invention relates to the field of control, and in particular to a shaft control method and apparatus for a magnetic levitation system.
- BACKGROUND OF THE INVENTION For magnetic levitation systems, the coupling between degrees is generally neglected, and the method of decentralized control is used to realize five-degree-of-freedom control, and each degree of freedom is independently controlled.
- the shaft of the magnetic levitation system as the object rotating at a high speed, eddy is inevitable, and the whirl includes cylindrical vortex and conical vortex, and the conical vortex is sharp at high speed.
- the cylindrical vortex is similar to the translational motion.
- the displacements at the front and rear ends are in phase with the same amplitude.
- the displacement at the front and rear ends is usually reversed.
- the displacement signal detected by the sensor is the displacement generated by the synthesis of the two motions.
- the whirl cannot be controlled.
- the whirl is severe, it is very likely that the magnetic levitation system will be unstable at high speed rotation. Therefore, it is extremely necessary to effectively control the whirl.
- a primary object of the present invention is to provide a shaft control method and apparatus for a magnetic levitation system to solve the problem that the magnetic levitation system of the prior art is difficult to suppress bearing whirl at high speed rotation.
- a shaft control method for a magnetic levitation system includes: acquiring a displacement signal obtained by detecting a displacement of a shaft in a magnetic levitation system; separating a vortex displacement from the displacement signal; and controlling eddy of the shaft according to the vortex displacement. Further, the front bearing sensor is used to detect the displacement of the front end of the shaft from the equilibrium position, and the rear bearing sensor is used to detect the displacement of the rear end of the shaft from the equilibrium position, and the vortex displacement is separated by the following formula: Where x fll and x M are the eddy displacements of the front and rear ends of the shaft, respectively.
- a arctan ⁇ ⁇
- a the vortex angle
- x al and x M are the vortex displacements of the front and rear ends of the shaft, respectively.
- / b the distance from the center of mass of the shaft to the rear bearing sensor
- X the displacement of the front end of the shaft detected by the front bearing sensor from the equilibrium position
- ⁇ is the displacement of the rear end of the shaft detected by the rear bearing sensor from the equilibrium position.
- separating the vortex displacement from the displacement signal comprises separating the displacement signal to obtain a translational displacement and a vortex displacement.
- the method further comprises: controlling the translation of the shaft according to the translational displacement, and
- the dynamic displacement includes the translational displacement at the front bearing and the translational displacement at the rear bearing.
- controlling the whirl of the shaft according to the whirl displacement and controlling the translation of the shaft according to the translational displacement include: controlling the translational displacement at the front bearing by using the first PID controller; using the second PID controller to the rear bearing The translational displacement at the position is controlled; and the third PID controller is used to control the vortex angle corresponding to the vortex displacement.
- An axis control device for a magnetic levitation system includes: an acquisition unit for acquiring a displacement signal obtained by detecting a displacement of a shaft in a magnetic levitation system; a separation unit for separating a vortex displacement from the displacement signal; a control unit for controlling the whirl of the shaft according to the whirl displacement. Further, a vortex displacement of the front end of the shaft is detected by a front bearing sensor, and a vortex displacement of a rear end of the shaft is detected by a rear bearing sensor for separating the vortex displacement by the following formula:
- x al, x M are swirled displacement front and rear ends of the shaft, /.
- / b is the distance from the center of mass of the shaft to the rear bearing sensor, X.
- the displacement of the front end of the shaft that is detected by the front bearing sensor from the equilibrium position is a displacement of the rear end of the shaft that is detected by the rear bearing sensor from the equilibrium position.
- the separating unit is configured to separate the displacement signal to obtain a translational displacement and the whirl displacement
- the control unit is further configured to: after obtaining the translational displacement, according to the The translational displacement controls the translation of the shaft, and the translational displacement includes a translational displacement at the front bearing and a translational displacement at the rear bearing.
- the control unit is configured to: control a translational displacement at the front bearing by using a first PID controller; and perform a translational displacement at the rear bearing by using a second PID controller Controlling; and controlling the eddy angle corresponding to the vortex displacement by using a third PID controller.
- an axis control method using a magnetic levitation system includes: acquiring a displacement signal obtained by detecting a displacement of a shaft in a magnetic levitation system; separating a vortex displacement from the displacement signal; and controlling a whirl of the shaft according to the whirl displacement, The eddy displacement is separated from the displacement signal, and the eddy rotation is controlled to suppress the eddy of the shaft, which solves the problem that the magnetic levitation system is difficult to suppress the eddy of the shaft during high-speed rotation, thereby achieving the suppression of the shaft vortex during the high-speed rotation of the magnetic levitation system. Dynamic effect.
- FIG. 1 is a schematic structural view of a magnetic levitation radial bearing according to an embodiment of the present invention
- FIG. 2 is a schematic view of a shaft control device of a magnetic levitation system according to a first embodiment of the present invention
- FIG. 4 is a schematic diagram of a shaft control device of a magnetic levitation system according to a second embodiment of the present invention
- FIG. 1 is a schematic structural view of a magnetic levitation radial bearing according to an embodiment of the present invention
- FIG. 2 is a schematic view of a shaft control device of a magnetic levitation system according to a first embodiment of the present invention
- FIG. 4 is a schematic diagram of a shaft control device of a magnetic levitation system according to a second embodiment of the present invention
- FIG. 1 is a schematic structural view of a magnetic levitation radial bearing according to an embodiment of the present invention
- FIG. 2 is a schematic view of a shaft control device of a magnetic levitation system according to a first embodiment
- FIG. 5 is a block diagram of a translational and vortex separation control of a shaft according to an embodiment of the present invention
- FIG. 6 is a flowchart of a shaft control method of a magnetic levitation system according to a first embodiment of the present invention
- FIG. 7 is a flow chart of a shaft control method of a magnetic levitation system according to a second embodiment of the present invention.
- FIG. 1 is a schematic cross-sectional view of a magnetic levitation system in accordance with an embodiment of the present invention.
- the magnetic levitation system includes shafts, protective bearings, bearing coils and sensors.
- the protective bearing is used to determine the relative position of the shaft to other parts and to support and guide. When the bearing coil around the bearing is energized, an electromagnetic force is generated, so that the shaft can be suspended in the magnetic levitation system to perform high-speed rotational motion.
- Xl , yi 2 and 2 are sensors, in this embodiment a displacement sensor for measuring the displacement signal of the shaft.
- 2 is a schematic view of a shaft control device of a magnetic levitation system according to a first embodiment of the present invention. As shown in FIG.
- the shaft control device of the magnetic levitation system includes an acquisition unit 10, a separation unit 20, and a control unit 30.
- the acquiring unit 10 is configured to acquire a displacement signal obtained by detecting a displacement of the shaft in the magnetic levitation system. Since the displacement of the shaft includes a translational displacement and a vortex displacement, the detected displacement signal includes a translational displacement and a vortex displacement.
- the displacement signal can be detected by a displacement sensor.
- the separating unit 20 is configured to separate the vortex displacement from the displacement signal. Since the displacement signal detected by the displacement sensor includes the translational displacement and the whirl displacement, the separation unit 20 separates the vortex displacement from the displacement signal, thereby facilitating translation. The displacement is separated from the eddy displacement and controlled separately.
- the process of separating the vortex displacement from the displacement signal can use the separation algorithm to separate the eddy displacement.
- the control unit 30 is configured to control the whirl of the shaft according to the whirl displacement. Since the vortex displacement of the shaft is larger, the vortex is more severe, and the control unit 30 adjusts and reduces the vortex displacement separated by the separation unit 20 to achieve control. The purpose of the vortex of the shaft.
- the axis control device of the magnetic levitation system is used to separate the vortex displacement from the displacement signal, and the control unit 30 controls to reduce the whirl displacement, thereby suppressing the eddy of the shaft, thereby solving the magnetic levitation system.
- the front bearing sensor is used to detect the displacement of the front end of the shaft from the equilibrium position
- the rear bearing sensor is used to detect the displacement of the rear end of the shaft from the equilibrium position.
- the separating unit 20 is used to separate the eddy displacement by the following formula: Where x fll and : ⁇ are the eddy displacements of the bearing at the front and rear ends, respectively. For the distance from the center of mass of the shaft to the front bearing sensor, / b is the distance from the center of mass of the shaft to the rear bearing sensor.
- the displacement of the front end of the bearing detected by the front bearing sensor from the equilibrium position is the displacement of the rear end of the bearing detected by the rear bearing sensor from the equilibrium position.
- x a and J b are available through the front bearing sensor and the rear bearing sensor.
- the front bearing sensor and the rear bearing sensor displacement respectively detect the actual detected displacement values of the front and rear ends of the shaft, and the displacement reference value minus the actual detected displacement values of the front and rear ends of the shaft can obtain the displacement of the front and rear ends of the shaft from the equilibrium position.
- the displacement reference value is the distance between the front and rear bearing sensors and the equilibrium position.
- 3 is a schematic view of a position at a certain moment in the rotation of a shaft according to an embodiment of the present invention. As shown in Fig.
- the front bearing sensor is Sensor Xa
- the rear bearing sensor is Sensor Xb
- the xz plane is parallel to the paper surface
- the y direction is perpendicular to the paper surface
- the center of mass 0 of the shaft is taken as the origin o, /.
- the horizontal distance from the center of mass of the shaft to the front bearing sensor, / b is the horizontal distance from the center of mass of the shaft to the rear bearing sensor
- 1 is the eddy displacement of the shaft at the front and rear bearings, respectively.
- X. 2 and 2 are the translational displacement of the shaft at the front and rear bearings, respectively, and a is the vortex angle.
- the axis of the magnetic levitation system is replaced by an axis, as indicated by the broken line 2 in the figure, wherein the equilibrium position is indicated by a solid line 2, and the broken line 1 indicates the position at the horizontal axis. It can be seen from Fig. 3 that the shaft has translational motion and whirl motion during the working process, and its displacement satisfies the relationship (1):
- DSP digital signal processor referred to as DSP
- the above algorithm may be executed by the separation unit 20, and the separation unit 20 separates the whirl displacement from the displacement signal detected by the sensor, and the control unit 30 uses the vortex displacement as the control parameter of the axis in the magnetic levitation system, by reducing Front bearing
- Fig. 4 is a shaft of the magnetic levitation system according to the second embodiment of the present invention. Schematic diagram of the control device.
- the shaft control device of the magnetic levitation system of this embodiment can be used as a preferred embodiment of the axis control device of the magnetic levitation system shown in Fig. 2.
- the axis control device of the magnetic levitation system includes an acquisition unit. 10.
- the calculation module 301 is configured to calculate a vortex angle of the shaft according to the vortex displacement, and the vortex displacement of the shaft is larger, and the corresponding The vortex angle is also larger, and the calculation module 301 calculates the vortex angle corresponding to the vortex displacement, and uses the vortex angle as a control parameter to facilitate the control of the eddy of the shaft.
- the control module 302 is used to control the vortex angle of the shaft. Within a predetermined range. The predetermined range is maintained within a small range around 0.
- the control shaft is Before the vortex angle, the vortex angle of the shaft is enlarged. Since the calculated value of the eddy angle of the shaft is small, it is necessary to enlarge the vortex angle before controlling the vortex angle of the shaft, and the magnification may be based on the actual situation.
- the setting is made.
- the vortex angle ring is used to control the vortex angle.
- the control parameters of the vortex angle ring will be large, and the vortex angle will be amplified to enable the vortex angle.
- the control parameters of the degree ring are not too large, so as to facilitate the debugging of the control parameters of the vortex angle ring, so as to achieve precise control of the vortex angle, thereby achieving the effect of suppressing the whirl of the shaft, and avoiding the occurrence of high frequency vortex in the magnetic levitation system.
- c for the cloud force angle
- x fll , ⁇ ⁇ are the vortex displacements at the front and rear ends of the shaft
- / is the distance from the center of mass of the shaft to the front bearing sensor
- ⁇ is the distance from the center of mass of the shaft to the rear bearing sensor
- ⁇ ⁇ is the displacement of the front end of the shaft detected by the front bearing sensor from the equilibrium position
- the displacement of the rear end of the shaft detected by the rear bearing sensor deviates from the equilibrium position.
- the separating unit 20 is configured to separate the displacement signal to obtain a translational displacement and a whirl displacement
- the control unit 30 is further configured to control the translation of the shaft according to the translational displacement after the translational displacement is obtained
- the translational displacement Includes translational displacement at the front bearing and translational displacement at the rear bearing.
- the displacement signal detected by the sensor includes an eddy displacement and a dynamic displacement, wherein the displacement signal detected by the front bearing sensor includes a vortex displacement at the front bearing and a translational displacement at the front bearing, and the displacement signal detected by the rear bearing sensor includes The vortex displacement at the rear bearing and the translational displacement at the rear bearing.
- the separating unit 20 separates the displacement signals to obtain translational displacement and whirl displacement
- the control unit 30 is further configured to control the translational displacement obtained by separating the displacement signals, and the translational motion of the shaft after separating the translational displacement and the whirl displacement.
- the eddy motion is separately controlled, which not only suppresses the whirl displacement of the shaft of the magnetic levitation system but also suppresses the translational displacement of the shaft of the magnetic levitation system, thereby further improving the stability of the magnetic levitation system.
- control unit 30 is configured to control the translational displacement at the front bearing by using a first PID (Proportion Integration Differentiation, PID) controller, and use the second PID controller to move the rear bearing The displacement is controlled, and the third PID controller is used to control the eddy angle corresponding to the vortex displacement.
- PID Proportion Integration Differentiation
- the three PID controllers are used to control the translational displacement at the front bearing, the translational displacement at the rear bearing and the vortex angle, which can reduce the interference between the controllers and realize the whirl and the movement of the shaft. Separation control.
- first”, “second” and “third” in the present embodiment are not intended to describe the embodiments of the present invention, and the present invention is not limited thereto.
- FIG. 5 is a block diagram of the translational and vortex separation control of the shaft in accordance with an embodiment of the present invention.
- PID1 is the first PID controller
- PID2 is the second PID controller
- PID3 is the third PID controller.
- the displacement sensor 1 is the front bearing portion in the embodiment of the invention
- the sensor, the displacement sensor 2 is a sensor at the rear bearing according to the embodiment of the present invention, and after displacement separation, the translational displacement at the front bearing, the translational displacement at the rear bearing, and the whirl displacement are obtained, and then according to the vortex displacement Calculate the eddy angle.
- the translational displacement at the front bearing, the translational displacement at the rear bearing, and the vortex angle are used as feedback parameters, and are respectively sent to the feedback inputs of the first PID controller, the second PID controller, and the third PID controller,
- the output of one PID is added to the output of the third PID as the current control amount iRefx l. of the front bearing X direction and the bias current I of the front bearing X direction.
- the transfer function of PI is + ; Where K P is a P parameter and is a 1 ⁇ parameter.
- the output of the second PID is subtracted from the output of the third PID as the current control amount I Refx of the rear bearing X direction; ⁇ , the bias current I Q s of the rear bearing X direction is added and subtracted by the control current I Refx , respectively
- the current reference value I Refx +I of the coil in the X direction of the rear bearing ⁇ , the current reference value I Refx ⁇ -Io of the lower coil
- the current value of the upper and lower coils detected by the current sensor is taken as the current feedback value I fdbl and after I fdb2 (I fdbl is the current feedback value of the coil on the front bearing, I fdb2 is the current feedback value of the coil under the front bearing).
- the embodiment of the present invention further provides a shaft control method for a magnetic levitation system.
- the axis control method of the magnetic levitation system can be run on a computer processing device. It should be noted that the magnetic body of the embodiment of the present invention
- the shaft control method of the suspension system can be performed by the shaft control device of the magnetic levitation system provided by the embodiment of the present invention.
- Fig. 6 is a flow chart showing a method of controlling the axis of a magnetic levitation system according to a first embodiment of the present invention.
- the axis control method of the magnetic levitation system includes the following steps: Step S101: Acquire a displacement signal obtained by detecting a displacement of an axis in the magnetic levitation system. Since the displacement of the shaft includes translational displacement and vortex displacement, the detected displacement signals include translational displacement and whirl displacement. The displacement signal can be detected by a displacement sensor. Step S102, separating the vortex displacement from the displacement signal.
- the separation unit 20 separates the vortex displacement from the displacement signal, and is convenient to separate the translational displacement from the eddy displacement, respectively, wherein the displacement signal is
- the process of separating the vortex displacement can be separated by vortex displacement using a separation algorithm.
- the whirl of the shaft is controlled according to the whirl displacement. Since the eddy displacement of the shaft is larger, the turbulence is more severe, and the control unit 30 adjusts and reduces the vortex displacement separated by the separation unit 20 to achieve the purpose of controlling the whirl of the shaft.
- the axis control device of the magnetic levitation system is used to separate the vortex displacement from the displacement signal, and the control unit 30 controls to reduce the whirl displacement, thereby suppressing the eddy of the shaft, thereby solving the magnetic levitation system. It is difficult to suppress the problem of the vortex of the shaft at the time of high-speed rotation, and the effect of suppressing the vortex of the magnetic levitation system at the time of high-speed rotation is achieved.
- the front bearing sensor is used to detect the vortex displacement of the front end of the shaft
- the rear bearing sensor is used to detect the vortex displacement of the rear end of the shaft
- the vortex displacement is separated by the following formula:
- _x al and _x M are the eddy displacements of the front and rear ends of the shaft, respectively.
- / b is the distance from the center of mass of the shaft to the rear bearing sensor, ⁇ .
- the displacement of the front end of the shaft detected by the front bearing sensor from the equilibrium position is the displacement of the rear end of the shaft detected by the rear bearing sensor from the equilibrium position.
- X. And x b are available through the front bearing sensor and the rear bearing sensor.
- the front bearing sensor and the rear bearing sensor displacement respectively detect the actual detected displacement values of the front and rear ends of the shaft, and the displacement reference value minus the actual detected displacement values of the front and rear ends of the shaft can obtain the displacement of the front and rear ends of the shaft from the equilibrium position.
- the displacement reference value is the distance between the front and rear bearing sensors and the equilibrium position.
- the relationship (2) of the vortex displacement at the front and rear bearings can be obtained:
- the vortex displacement at the front and rear bearings is obtained, and the calculation process is simple, and is easily realized in a processor such as a DSP processor.
- the above algorithm may be executed by the separation unit 20, the separation unit 20 separates the whirl displacement from the displacement signal detected by the sensor, and the control unit 30 uses the vortex displacement as the control parameter of the axis in the magnetic levitation system, by reducing The displacement at the front bearing and the displacement 1 at the rear bearing achieve the purpose of suppressing the whirl of the shaft, effectively achieving the effect of suppressing the eddy of the shaft, and improving the stability of the magnetic levitation system.
- FIG. 7 is a flow chart showing a method of controlling the axis of a magnetic levitation system in accordance with a second embodiment of the present invention.
- This embodiment can be taken as a preferred embodiment of the axis control method of the magnetic levitation system of the embodiment shown in Fig. 6.
- the axis control method of the magnetic levitation system includes the following steps: Step S201: Acquire a displacement signal obtained by detecting a displacement of an axis in a magnetic levitation system. Since the displacement of the shaft includes translational displacement and vortex displacement, the detected displacement signals include translational displacement and whirl displacement. The displacement signal can be detected by a displacement sensor. Step S202, separating the eddy displacement from the displacement signal.
- the separation unit 20 separates the vortex displacement from the displacement signal, and is convenient to separate the translational displacement from the eddy displacement, respectively, wherein the displacement signal is
- the process of separating the vortex displacement can be separated by vortex displacement using a separation algorithm.
- Step S203 calculating a vortex angle of the shaft according to the whirl displacement. The larger the vortex displacement of the shaft is, the larger the corresponding vortex angle is.
- the calculation module 301 calculates the vortex angle corresponding to the vortex displacement, and uses the vortex angle as a control parameter to facilitate the control of the whirl of the shaft.
- the vortex angle of the control shaft is within a predetermined range.
- the predetermined range is kept in a small range around 0. Since the vortex displacement of the shaft is larger, the vortex of the shaft is more intense, and the corresponding vortex angle is larger, so that the vortex angle is effectively controlled to 0. In the vicinity, the vortex angle is as close as possible to zero, so that the eddy of the shaft can be effectively suppressed. Further preferably, the vortex angle of the shaft is enlarged before the vortex angle of the shaft is controlled. Since the calculated value of the vortex angle of the shaft is small, it is necessary to enlarge the vortex angle before controlling the vortex angle of the shaft, and the magnification thereof can be set according to the actual situation.
- the vortex angle ring is used to control the vortex angle.
- the control parameters of the vortex angle ring will be large, and the vortex angle will be amplified, so that the control parameters of the vortex angle ring will not be too Large, in order to debug the control parameters of the vortex angle ring, in order to achieve precise control of the vortex angle, thereby achieving the effect of suppressing the whirl of the shaft, avoiding the occurrence of high frequency eddy of the magnetic levitation system and instability. occur.
- a arctan -
- a arctan - ⁇
- separating the vortex displacement from the displacement signal comprises separating the displacement signal to obtain a translational displacement and a vortex displacement.
- the method further comprises: controlling the translation of the bearing according to the translational displacement,
- the dynamic displacement includes the translational displacement at the front bearing and the translational displacement at the rear bearing.
- the displacement signal detected by the sensor includes an eddy displacement and a dynamic displacement, wherein the displacement signal detected by the front bearing sensor includes a vortex at the front bearing Before the dynamic displacement and the translational displacement at the front bearing, the displacement signal detected by the rear bearing sensor includes the vortex displacement at the rear bearing and the translational displacement at the rear bearing.
- the separating unit 20 separates the displacement signals to obtain translational displacement and whirl displacement, and the control unit 30 is further configured to control the translational displacement obtained by separating the displacement signals, and the translational motion of the shaft after separating the translational displacement and the whirl displacement.
- controlling the whirl of the bearing according to the whirl displacement and controlling the translation of the bearing according to the translational displacement comprises: controlling the translational displacement at the front bearing by using the first PID controller; using the second PID controller The translational displacement at the bearing is controlled; and the third PID controller is used to control the vortex angle corresponding to the vortex displacement.
- the three PID controllers are used to control the translational displacement at the front bearing, the translational displacement at the rear bearing and the vortex angle, which can reduce the interference between the controllers and realize the whirl and the movement of the shaft. Separation control.
- the “first”, “second” and “third” in the present embodiment are not intended to describe the embodiments of the present invention, and the present invention is not limited thereto.
- the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices.
- the invention is not limited to any specific combination of hardware and software.
- the above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.
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- Mechanical Engineering (AREA)
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- Automation & Control Theory (AREA)
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Abstract
Description
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/021,724 US10253809B2 (en) | 2013-09-12 | 2014-08-01 | Shaft control method and device for magnetic suspension system |
EP14844106.6A EP3046249B1 (en) | 2013-09-12 | 2014-08-01 | Shaft control method and device for magnetic suspension system |
JP2016541781A JP6374511B2 (ja) | 2013-09-12 | 2014-08-01 | 磁気浮上システムの軸制御方法及び装置 |
KR1020167009687A KR20170041652A (ko) | 2013-09-12 | 2014-08-01 | 자기부상 시스템의 축 제어 방법 및 장치 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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CN201310416595.4 | 2013-09-12 | ||
CN201310416595.4A CN104467545B (zh) | 2013-09-12 | 2013-09-12 | 磁悬浮系统的轴控制方法和装置 |
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WO2015035836A1 true WO2015035836A1 (zh) | 2015-03-19 |
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JP (1) | JP6374511B2 (zh) |
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CN105689160B (zh) * | 2016-01-20 | 2019-01-08 | 珠海格力节能环保制冷技术研究中心有限公司 | 一种用于磁悬浮离心机的停机方法及装置 |
JP2019015303A (ja) * | 2017-07-04 | 2019-01-31 | 株式会社日立製作所 | 磁気軸受の制御装置および制御方法 |
CN107612427B (zh) * | 2017-09-18 | 2019-02-19 | 珠海格力节能环保制冷技术研究中心有限公司 | 磁悬浮系统及其电流响应速度检测方法和装置 |
DE102018120323A1 (de) * | 2017-09-29 | 2019-04-04 | Shimano Inc. | Fahrradkettenaussenlaschenplatte und Fahrradkette |
CN110212811B (zh) * | 2019-05-27 | 2020-08-04 | 珠海格力电器股份有限公司 | 一种电流控制装置、磁悬浮系统及其电流控制方法 |
CN111473049B (zh) * | 2020-04-17 | 2021-08-20 | 河海大学 | 一种实心定子磁悬浮励磁电流的控制方法 |
CN111894980B (zh) * | 2020-07-31 | 2022-02-18 | 苏州工业园区服务外包职业学院 | 一种磁悬浮轴承系统控制方法 |
CN112945165B (zh) * | 2021-03-23 | 2022-09-23 | 华驰动能(北京)科技有限公司 | 一种基于谐波小波的磁悬浮转子动不平衡位移检测方法 |
CN113280042B (zh) * | 2021-05-21 | 2022-05-10 | 珠海格力电器股份有限公司 | 一种磁悬浮轴承的控制装置、方法和磁悬浮系统 |
CN113358307B (zh) * | 2021-06-02 | 2023-03-21 | 西安西热节能技术有限公司 | 一种根据轴振信号确定转子涡动方向的判断方法 |
CN114135580B (zh) * | 2021-11-04 | 2022-07-26 | 珠海格力电器股份有限公司 | 磁轴承转子的位置评估方法及装置 |
KR20230091507A (ko) * | 2021-12-16 | 2023-06-23 | 에이피시스템 주식회사 | 자기부상 회전 장치 및 자기부상 회전 방법 |
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- 2013-09-12 CN CN201310416595.4A patent/CN104467545B/zh active Active
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JP2002081444A (ja) * | 2000-09-05 | 2002-03-22 | Shimadzu Corp | 磁気軸受装置および磁気軸受装置のセンサ感度調整方法 |
CN1738183A (zh) * | 2005-07-21 | 2006-02-22 | 北京航空航天大学 | 一种高速磁悬浮飞轮稳定控制系统 |
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EP3046249A4 (en) | 2017-05-31 |
EP3046249A1 (en) | 2016-07-20 |
CN104467545B (zh) | 2018-04-17 |
KR20170041652A (ko) | 2017-04-17 |
US20160230810A1 (en) | 2016-08-11 |
EP3046249B1 (en) | 2019-06-19 |
JP6374511B2 (ja) | 2018-08-15 |
CN104467545A (zh) | 2015-03-25 |
US10253809B2 (en) | 2019-04-09 |
JP2016535580A (ja) | 2016-11-10 |
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