CN109854622B - Active magnetic bearing system capable of controlling axial system radial vibration based on intelligent material - Google Patents
Active magnetic bearing system capable of controlling axial system radial vibration based on intelligent material Download PDFInfo
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- CN109854622B CN109854622B CN201910232533.5A CN201910232533A CN109854622B CN 109854622 B CN109854622 B CN 109854622B CN 201910232533 A CN201910232533 A CN 201910232533A CN 109854622 B CN109854622 B CN 109854622B
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Abstract
The invention discloses an active magnetic bearing system capable of controlling axial system radial vibration based on an intelligent material, which relates to the technical field of electromagnetism and comprises a shell, an intelligent material actuator, an iron core, an excitation coil, a position sensor, a rotor, a vibration sensor, a signal acquisition module, an active controller, a first power amplifier, an excitation controller and a second power amplifier; the intelligent material is positioned in the shell and distributed in the radial direction, the intelligent material is directly connected with the iron core, and the iron core is wound with the excitation coil; the position sensor is arranged between the iron core and the rotor; the active controller controls the axial system radial vibration and the rotor position; the first power amplifier drives the smart material actuator; the second power amplifier drives the excitation coil; the excitation controller controls the excitation current. The position of the rotor is directly output and controlled through controlling the displacement of the intelligent material, the control mode is simple and reliable, the vibration sensor is combined to effectively control the radial vibration of a shafting through the intelligent material actuator, and the impact on the base is reduced.
Description
Technical Field
The invention relates to the technical field of electromagnetism, in particular to an active magnetic bearing system capable of controlling axial system radial vibration based on an intelligent material.
Background
The magnetic bearing has the characteristics of no friction, no abrasion and no need of lubrication, the rotor can rotate at high speed, the rotating speed of the rotor is only limited by the strength of the rotor material, the power consumption and the noise are extremely low, and the magnetic bearing can be suitable for various complex application environments. Another outstanding advantage of the magnetic bearing is that the rotor operating state can be detected by the control system in real time, the magnitude of the imbalance can be evaluated on line and the imbalance can be actively controlled, so that the control of the rotor system can achieve high precision.
The reason that the existing magnetic bearing is difficult to be applied in large-scale engineering is that the structure has local nonlinearity due to air gaps, magnetic hysteresis and the like, the control difficulty is increased, and accurate position control is difficult to realize. In addition, for naval vessels, the radial vibration of a shafting can excite the shell, so that the shell vibrates and generates radiated sound, and the stealth performance is reduced by exposing the position of the shell.
Disclosure of Invention
In order to solve the problems and the technical requirements, the invention provides an active magnetic bearing system capable of controlling the radial vibration of a shafting based on an intelligent material.
The technical scheme of the invention is as follows:
an active magnetic bearing system capable of controlling shafting radial vibration based on smart materials, comprising: the device comprises a shell, an intelligent material actuator, an iron core, an excitation coil, a position sensor, a rotor, a vibration sensor, a signal acquisition module, an active controller, a first power amplifier, an excitation controller and a second power amplifier;
the intelligent materials of the intelligent material actuator are positioned in the shell and distributed in a radial direction, the intelligent materials are directly connected with the iron core, and the iron core is wound with the excitation coil; the position sensor is between the core and the rotor; the smart material actuator, the iron core, the excitation coil, the rotor and the position sensor are arranged inside the shell; the position sensor and the vibration sensor are respectively connected to the input of the signal acquisition module, the output of the signal acquisition module is respectively connected with the input of the active controller and the input of the excitation controller, the output of the active controller is connected with the first power amplifier, and the first power amplifier is connected with the intelligent material actuator; the output of the excitation controller is connected with the second power amplifier, and the second power amplifier is connected with the excitation coil;
the active controller is used for controlling axial system radial vibration and rotor position;
the first power amplifier is used for driving the smart material actuator;
the second power amplifier is used for driving the excitation coil;
the excitation controller is used for controlling the excitation current.
The further technical scheme is as follows: signals of the position sensor and the vibration sensor are transmitted to the active controller through the signal acquisition module; the active controller outputs a control signal to the first power amplifier by processing data and running a predetermined algorithm; the first power amplifier drives a designated intelligent material to operate according to the output of the active controller; and the excitation controller drives the excitation coil through the second power amplifier according to the position information sent by the signal acquisition module.
The further technical scheme is as follows: the position sensor, the vibration sensor, the signal acquisition module, the active controller, the first power amplifier and the intelligent material actuator form a real-time closed-loop rotor position and shafting radial vibration control system.
The further technical scheme is as follows: the position sensor, the vibration sensor, the signal acquisition module, the excitation controller, the second power amplifier and the excitation coil jointly form a closed-loop rotor position control system.
The further technical scheme is as follows: the intelligent material comprises at least one of a piezoelectric stack material and a magnetostrictive material.
The beneficial technical effects of the invention are as follows:
the position control of the magnetic bearing and the radial vibration control of the shafting are integrated, and the position control precision of the rotor is improved by directly controlling the displacement output of the intelligent material; the position of the rotor is prevented from being adjusted directly by adjusting the exciting current, and the position control difficulty of the magnetic bearing is simplified; in addition, the vibration sensor can be used for controlling the radial vibration of the shafting, and the excitation of the shafting vibration to the base is reduced.
Drawings
Fig. 1 is a schematic diagram of an active magnetic bearing system capable of controlling shafting radial vibration based on smart materials according to an embodiment of the present invention.
Detailed Description
The following further describes the embodiments of the present invention with reference to the drawings.
Aiming at the defects in the prior art, the invention improves the position control method of the magnetic bearing and improves the position control precision by using intelligent materials based on the magnetic suspension and vibration active control method, and simultaneously controls the radial vibration of a shafting. Fig. 1 is a schematic diagram of an active magnetic bearing system capable of controlling shafting radial vibration based on smart materials according to an embodiment of the present invention, as shown in fig. 1, the system may include: the device comprises a shell 1, an intelligent material actuator 2, an iron core 3, a magnet exciting coil 4, a position sensor 5, a rotor 6, a vibration sensor 7, a signal acquisition module 8, an active controller 9, a first power amplifier 10, an excitation controller 11 and a second power amplifier 12.
The intelligent material of the intelligent material actuator 2 is located inside the shell and distributed in the radial direction, the intelligent material is directly connected with the iron core 3, and the iron core 3 is wound with the magnet exciting coil 4.
Optionally, the smart material includes at least one of a piezoelectric stack material, a magnetostrictive material, and the like.
The position sensor 5 is between the iron core 3 and the rotor 6; the intelligent material actuator 2, the iron core 3, the excitation coil 4, the rotor 6 and the position sensor 5 are arranged in the shell 1; the position sensor 5 and the vibration sensor 7 are respectively connected to the input of a signal acquisition module 8, the output of the signal acquisition module 8 is respectively connected with the input of an active controller 9 and the input of an excitation controller 11, the output of the active controller 9 is connected with a first power amplifier 10, and the first power amplifier 10 is connected with the intelligent material actuator 2; the output of the excitation controller 11 is connected to a second power amplifier 12, and the second power amplifier 12 is connected to the excitation coil 4.
The active controller 9 is used for controlling the shafting radial vibration and the rotor position.
The first power amplifier 10 is used to drive the smart material actuator 2.
The second power amplifier 12 is used to drive the exciting coil 4.
The excitation controller 11 is used to control the excitation current.
Signals of the position sensor 5 and the vibration sensor 7 are transmitted to the active controller 9 through the signal acquisition module 8; the active controller 9 outputs a control signal to the first power amplifier 10 by processing data and running a predetermined algorithm; the first power amplifier 10 drives the designated intelligent material to operate according to the output of the active controller 9; the excitation controller 11 drives the excitation coil 4 through the second power amplifier 12 according to the position information sent by the signal acquisition module 8.
The position sensor 5, the vibration sensor 7, the signal acquisition module 8, the active controller 9, the first power amplifier 10 and the intelligent material actuator 2 form a real-time closed-loop rotor position and shafting radial vibration control system.
The position of the rotor can be controlled by directly controlling the displacement output of the intelligent material, the position of the rotor does not need to be controlled by controlling the exciting current, and the control mode is simple and reliable.
The position sensor 5, the vibration sensor 7, the signal acquisition module 8, the excitation controller 11, the second power amplifier 12 and the excitation coil 4 together form a closed-loop rotor position control system. The system generally plays a monitoring role after the system is started stably and plays a role when the former control system fails or the rotor displacement exceeds the effective output displacement of the intelligent material.
The radial vibration of a shafting can be effectively controlled by combining the vibration sensor 7 through the intelligent material actuator 2, the impact on the base is reduced, the impact of paddle-shaft vibration on the shell can be effectively reduced for a naval vessel, the sound radiation of the shell is weakened, and the stealth performance is improved.
Optionally, the excitation current is generally kept constant, and is not required to be changed according to the position information, and is only adjusted when the vibration control system fails or the position change exceeds the effective output displacement range of the intelligent material.
Optionally, the intelligent material, the iron core 3 and the excitation coil 4 may be designed according to the maturity of a vibration control algorithm and the requirement of position control accuracy, one group of excitation coil and the permanent magnet may control the vibration in one direction, two groups of perpendicular excitation coils and permanent magnets may control the vibration in any direction in a circumferential plane by adopting a vector control principle, the excitation coil and the permanent magnet are added in a corresponding direction, and the vibration in a corresponding direction may also be controlled.
The embodiment of the invention integrates the position control of the magnetic bearing and the radial vibration control of the shafting, simplifies the system and the structure, improves the integration level and the engineering practicability of the system, and ensures the safe, stable and reliable operation of the system because the two control systems operate independently and are redundant.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments. It is to be understood that other modifications and variations directly derivable or suggested by those skilled in the art without departing from the spirit and concept of the present invention are to be considered as included within the scope of the present invention.
Claims (5)
1. An active magnetic bearing system capable of controlling shafting radial vibration based on smart materials, comprising: the device comprises a shell, an intelligent material actuator, an iron core, an excitation coil, a position sensor, a rotor, a vibration sensor, a signal acquisition module, an active controller, a first power amplifier, an excitation controller and a second power amplifier;
the intelligent materials of the intelligent material actuator are positioned in the shell and distributed in a radial direction, the intelligent materials are directly connected with the iron core, and the iron core is wound with the excitation coil; the position sensor is between the core and the rotor; the smart material actuator, the iron core, the excitation coil, the rotor and the position sensor are arranged inside the shell; the position sensor and the vibration sensor are respectively connected to the input of the signal acquisition module, the output of the signal acquisition module is respectively connected with the input of the active controller and the input of the excitation controller, the output of the active controller is connected with the first power amplifier, and the first power amplifier is connected with the intelligent material actuator; the output of the excitation controller is connected with the second power amplifier, and the second power amplifier is connected with the excitation coil;
the active controller is used for controlling axial system radial vibration and rotor position;
the first power amplifier is used for driving the smart material actuator;
the second power amplifier is used for driving the excitation coil;
the excitation controller is used for controlling the excitation current.
2. The active magnetic bearing system with smart material-based controllable shafting radial vibration of claim 1, wherein signals of the position sensor and the vibration sensor are transmitted to the active controller through the signal acquisition module; the active controller outputs a control signal to the first power amplifier by processing data and running a predetermined algorithm; the first power amplifier drives a designated intelligent material to operate according to the output of the active controller; and the excitation controller drives the excitation coil through the second power amplifier according to the position information sent by the signal acquisition module.
3. The active magnetic bearing system with smart material-based controllable shafting radial vibration of claim 2, wherein said position sensor, said vibration sensor, said signal acquisition module, said active controller, said first power amplifier, said smart material actuator constitute a real-time closed-loop rotor position and shafting radial vibration control system.
4. The active magnetic bearing system of claim 2 wherein the position sensor, the vibration sensor, the signal acquisition module, the excitation controller, the second power amplifier, and the excitation coil together comprise a closed-loop rotor position control system.
5. The active magnetic bearing system with controllable shafting radial vibration based on smart material according to any one of claims 1 to 4, wherein said smart material comprises at least one of a piezo-electric stack material and a magnetostrictive material.
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| CN201910232533.5A CN109854622B (en) | 2019-03-26 | 2019-03-26 | Active magnetic bearing system capable of controlling axial system radial vibration based on intelligent material |
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| CN201910232533.5A CN109854622B (en) | 2019-03-26 | 2019-03-26 | Active magnetic bearing system capable of controlling axial system radial vibration based on intelligent material |
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| CN109854622B true CN109854622B (en) | 2020-04-28 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110333060B (en) * | 2019-08-08 | 2024-05-24 | 中国船舶重工集团公司第七0三研究所 | Rotary machinery rotor vibration wireless measurement system based on piezoelectric self-energy supply |
| CN112483539A (en) * | 2020-10-19 | 2021-03-12 | 南京航空航天大学 | Intelligent elastic bearing and control method |
| CN113685487B (en) * | 2021-08-30 | 2022-12-02 | 武汉理工大学 | Double-channel shafting transverse vibration active control device |
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