WO2022056981A1 - 一种直线电机推力波动的抑制方法、相关设备和介质 - Google Patents

一种直线电机推力波动的抑制方法、相关设备和介质 Download PDF

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Publication number
WO2022056981A1
WO2022056981A1 PCT/CN2020/121347 CN2020121347W WO2022056981A1 WO 2022056981 A1 WO2022056981 A1 WO 2022056981A1 CN 2020121347 W CN2020121347 W CN 2020121347W WO 2022056981 A1 WO2022056981 A1 WO 2022056981A1
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Prior art keywords
mapping relationship
linear motor
current
thrust fluctuation
position data
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PCT/CN2020/121347
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English (en)
French (fr)
Inventor
陈敏
郭顺
王洪兴
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瑞声声学科技(深圳)有限公司
瑞声科技（南京）有限公司
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Publication of WO2022056981A1 publication Critical patent/WO2022056981A1/zh

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
    • H02P21/05—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation specially adapted for damping motor oscillations, e.g. for reducing hunting
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
    • H02P21/14—Estimation or adaptation of machine parameters, e.g. flux, current or voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
    • H02P21/14—Estimation or adaptation of machine parameters, e.g. flux, current or voltage
    • H02P21/18—Estimation of position or speed
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
    • H02P21/22—Current control, e.g. using a current control loop
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
    • H02P25/06—Linear motors

Definitions

  • the invention relates to the technical field of linear motors, in particular to a method for suppressing thrust fluctuations of linear motors, related equipment and media.
  • a linear motor is a transmission device that directly converts electrical energy into linear motion mechanical energy without any intermediate conversion mechanism. It can be regarded as a rotating electrical machine which is cut radially and developed into a plane.
  • the thrust fluctuation of the linear motor is one of the main defects in its application, because the thrust fluctuation is the cause of the motor vibration and noise, especially when running at low speed, it may also cause resonance and affect the use effect.
  • a method for suppressing thrust fluctuation of a linear motor including:
  • Step S0 obtaining the mapping relationship N I of the thrust and current of the linear motor
  • Step S1 obtaining the mapping relationship I 0X between the current corresponding to the positioning force of the linear motor and the position data;
  • Step S2 obtaining the mapping relationship I aX of the current corresponding to the thrust fluctuation caused by the test current I a and the position data of the linear motor;
  • Step S3 according to the mapping relationship I aX , obtain the mapping relationship I bX between the current and the position data corresponding to the thrust fluctuation caused by the operating current I b ;
  • Step S4 Store the mapping relationship I 0X and the mapping relationship I bX in the control system of the linear motor, so as to be used to calculate the current compensation value I' bX of the operating current I b of the linear motor, to achieve The thrust fluctuation of the linear motor is suppressed.
  • step S1 includes:
  • Step S10 obtaining the mapping relationship F 0X between the positioning force of the linear motor and the position data measured experimentally;
  • Step S11 Obtain the mapping relationship I 0X according to the mapping relationship N I and the mapping relationship F 0X .
  • step S1 includes:
  • the mover of the linear motor is controlled to move at a constant speed by an external force, and the current values of the linear motor corresponding to the mover at different positions during the moving process are collected to obtain the Describe the mapping relationship I 0X .
  • step S2 includes:
  • Step S20 obtaining the mapping relationship F′ 0X of the first thrust fluctuation and position data of the linear motor obtained by simulation under the condition of zero current;
  • Step S21 obtaining the mapping relationship F′ aX of the second thrust fluctuation and position data of the linear motor obtained by simulation under the condition of applying the test current I a ;
  • Step S22 Obtain the mapping relationship I aX according to the mapping relationship F′ OX and the mapping relationship F′ aX .
  • step S22 includes:
  • Step S220 Subtract the first thrust fluctuation from the second thrust fluctuation corresponding to the same position data in the mapping relationship F′ 0X and the mapping relationship F′ aX to obtain the thrust fluctuation difference and the Describe the mapping relationship F aX of each position data;
  • Step S221 Obtain the mapping relationship I aX according to the mapping relationship F aX and the mapping relationship N I .
  • step S3 includes:
  • mapping relation I bX is obtained according to the following relational equation:
  • mapping relationship between the current corresponding to the thrust fluctuation caused by the operating current I b and the position data is equal to the mapping relationship I aX multiplied by the ratio of the operating current I b to the test current I a .
  • step S4 includes:
  • mapping relationship I 0X and the mapping relationship I bX determine the mapping relationship I b0X between the compensation current corresponding to the operating current I b and the position data;
  • a device for suppressing thrust fluctuation of a linear motor comprising:
  • an acquisition module for acquiring the mapping relationship N I of the thrust of the linear motor and the current; acquiring the mapping relationship I 0X of the current corresponding to the positioning force of the linear motor and the position data;
  • the acquisition module is also used to acquire the mapping relationship I aX of the current and the position data corresponding to the thrust fluctuation caused by the test current I a of the linear motor;
  • a processing module configured to obtain, according to the mapping relationship I aX , the mapping relationship I bX between the current and the position data corresponding to the thrust fluctuation caused by the operating current I b ;
  • the processing module is further configured to store the mapping relationship I 0X and the mapping relationship I bX in the control system of the linear motor, so as to be used for calculating the current compensation value I′ of the operating current I b of the linear motor bX , so as to suppress the thrust fluctuation of the linear motor.
  • a linear motor including a linear motor component and a control system, wherein the control system includes reference data obtained as described in the first aspect and any possible implementation manner thereof, including the current corresponding to the positioning force and the The mapping relationship I 0X of the position data and the mapping relationship I bX of the current corresponding to the thrust fluctuation caused by the operating current I b and the position data, the control system is used to calculate the relationship with the thrust fluctuation of the linear motor based on the reference data.
  • a current compensation value I'bX proportional to the operating current, and the operating current is compensated using the current compensation value I'bX .
  • a storage medium stores a computer instruction program, the computer instruction program is loaded by a processor and executes the steps of the above-mentioned first aspect and any possible implementation manners thereof.
  • the beneficial effect of the present invention is that: by performing data integration and derivation through simulation or testing, the mapping relationship between the current and the position corresponding to the thrust fluctuation caused by the operating current under a certain current can be obtained, and the current corresponding to the positioning force of the linear motor can be obtained.
  • the mapping relationship I 0X with the position data, the mapping relationship I 0X between the current corresponding to the positioning force and the position data and the mapping relationship I bX corresponding to the thrust fluctuation caused by the operating current I b and the position data are stored in the control of the linear motor.
  • the system can use the mapping relationship to calculate the compensation current value to compensate the operating current at any position when the linear motor is working, so that the final thrust fluctuation of the linear motor output can be effectively suppressed.
  • FIG. 1 is a schematic flowchart of a method for suppressing thrust fluctuation of a linear motor provided by the present invention
  • FIG. 2 is a schematic flowchart of another method for suppressing thrust fluctuation of a linear motor provided by the present invention
  • FIG. 3 is a schematic structural diagram of a device for suppressing thrust fluctuation of a linear motor provided by the present invention.
  • the linear motor mentioned in the embodiments of the present invention is a transmission device that directly converts electrical energy into linear motion mechanical energy without any intermediate conversion mechanism. It can be regarded as a rotating electrical machine which is cut radially and developed into a plane. Linear motors are also called linear motors, linear motors, linear motors, push rod motors, etc.
  • the side derived from the stator is called the primary
  • the side derived from the mover (rotor) is called the secondary.
  • the primary and secondary are manufactured to different lengths to ensure that the coupling between the primary and secondary remains unchanged over the required travel range.
  • Linear motors can be either short primary and long secondary, or long primary and short secondary. Considering the manufacturing cost and operating cost, take a linear induction motor as an example: when the primary winding is connected to the AC power supply, a traveling wave magnetic field will be generated in the air gap, and the secondary will induce electromotive force and generate current under the cutting of the traveling wave magnetic field. , the current interacts with the magnetic field in the air gap to generate electromagnetic thrust.
  • FIG. 1 is a schematic flowchart of a method for suppressing thrust fluctuation of a linear motor provided by an embodiment of the present invention.
  • the method may include:
  • the executive body of the embodiment of the present invention may be a linear motor thrust fluctuation suppression device, and the linear motor thrust fluctuation suppression device can suppress the thrust fluctuation generated by the linear motor, or in other words, can establish a thrust fluctuation suppression device for the linear motor.
  • the device for suppressing the thrust fluctuation of the linear motor may be a system including a linear motor, or may be an electronic device, and the electronic device may be a terminal device, including but not limited to laptop computers, tablet computers, etc. such as other portable devices or desktop computers.
  • detent torque In a permanent magnet motor, even if the stator windings are not excited, there is an electromagnetic torque, which is called detent torque, or cogging torque/reluctance torque.
  • detent torque In a permanent magnet motor, even if the stator windings are not excited, there is an electromagnetic torque, which is called detent torque, or cogging torque/reluctance torque.
  • the mapping relationship between the current corresponding to the positioning force of the linear motor and the position data can be expressed as a positioning force curve of the linear motor, which can be obtained according to actual test statistics or simulation tests.
  • the foregoing step 101 may specifically include:
  • mapping relationship I the above-mentioned mapping relationship
  • the mapping relationship between the thrust and the current of the linear motor is a type of characteristic parameter of the linear motor, which can be obtained by simulation according to the test or information stored in the linear motor, which is not limited here.
  • the mapping relationship between the positioning force of the motor and the position data can be measured experimentally, and then specifically according to the mapping relationship between the motor thrust and the current, the current-position data corresponding to the positioning force can be derived and obtained, which can be expressed as I 0X (X Represents location data, which can be different locations).
  • the above step 101 may further include:
  • the mover of the linear motor is controlled to move at a constant speed, the current values of the linear motor corresponding to the mover at different positions during the movement are collected, and the current and position corresponding to the positioning force are obtained.
  • the mapping relationship I 0X of the data is obtained.
  • the linear motor when the linear motor is installed horizontally, the linear motor can be controlled to move the corresponding position stroke at a constant speed and slowly, and its current and position information can be detected during this process, and the detected current value is exactly the specific position ( The current value corresponding to the positioning force under X) is obtained, namely I 0X .
  • the above test current can be any non-zero current value.
  • the mapping relationship between the current and the position data corresponding to the thrust fluctuation caused by the test current can be obtained by testing.
  • the thrust fluctuation caused by the positioning force needs to be considered. , to obtain data corresponding to thrust fluctuations caused only by the test current.
  • step 102 may include:
  • mapping relationship F′ 0X of the first thrust fluctuation and position data of the above-mentioned linear motor obtained by simulation under the situation of zero current, and the second thrust fluctuation and position data of the above-mentioned linear motor under the situation of applying the above-mentioned test current I a
  • the thrust fluctuation under 0 current of the linear motor can be regarded as the thrust fluctuation caused by the positioning force.
  • the thrust fluctuations of the linear motor in the case of zero current and a preset test current I a can be obtained by simulation, as well as the position data corresponding to the thrust fluctuations.
  • the mapping relationship between the two sets of thrust fluctuations and the position data (the first thrust
  • the mapping relationship between the fluctuation and the position data and the mapping relationship between the second thrust fluctuation and the position data) are analyzed and deduced, and the influence of the thrust fluctuation caused by the positioning force is removed, and only a specific test current (the current value is I a ) can be obtained.
  • the mapping relationship I aX between the current corresponding to the induced thrust fluctuation and the position data.
  • the above step 1022 may include:
  • mapping relationship F' 0X and the above-mentioned mapping relationship F' aX the above-mentioned second thrust fluctuation corresponding to the same position data is subtracted from the above-mentioned first thrust fluctuation, so as to obtain a mapping between the thrust fluctuation difference and the above-mentioned respective position data.
  • relation FaX the above-mentioned second thrust fluctuation corresponding to the same position data is subtracted from the above-mentioned first thrust fluctuation, so as to obtain a mapping between the thrust fluctuation difference and the above-mentioned respective position data.
  • mapping relationship I aX is obtained according to the aforementioned mapping relationship F aX and the aforementioned mapping relationship N I .
  • mapping relationship F′ 0X of the first thrust fluctuation and position data under the 0 current of the linear motor, and the second thrust fluctuation and position data under a certain non-zero current (denoted as I a ) are obtained through simulation.
  • mapping relationship I aX obtain the mapping relationship I bX between the current and the position data corresponding to the thrust fluctuation caused by the operating current I b .
  • the current-position data corresponding to the thrust fluctuation caused by the specific operating current I b can be derived and calculated, which is I bX . It can be obtained by first obtaining multiple sets of current-position data corresponding to thrust fluctuations caused by different current values, and then integrating them.
  • mapping relationship I bX can be obtained according to the following relational equation:
  • mapping relationship between the current and the position data corresponding to the thrust fluctuation caused by the operating current Ib is equal to the ratio of the operating current Ib to the test current Ia multiplied by the mapping relationship I aX .
  • mapping relationship I bX when the operating current of the linear motor is known, the current compensation corresponding to the thrust fluctuation caused by the operating current can be determined.
  • mapping relationship I 0X and the above-mentioned mapping relationship I bX in the control system of the above-mentioned linear motor, so as to be used to calculate the current compensation value I′ bX with the operating current I b of the above-mentioned linear motor, so as to realize the suppression of the above-mentioned linear motor. thrust fluctuations.
  • mapping relationship I 0X of the current corresponding to the positioning force and the position data, and the mapping relationship I bX of the current and the position data corresponding to the thrust fluctuation caused by the operating current I b it can be integrated into the compensation corresponding to the operating current I b
  • the mapping relationship I b0X between the current and the position data, that is, including the current compensation for the thrust fluctuation caused by the positioning force and the operating current, is stored in the control system of the linear motor.
  • the present invention obtains the mapping relationship I 0X between the current corresponding to the positioning force of the linear motor and the position data and the mapping relationship I bX between the current and the position data corresponding to the thrust fluctuation caused by the operating current I b through the above steps, and stores them in the linear motor
  • the above-mentioned mapping relationship can be used to compensate any operating current when the linear motor is working, and at the same time, the thrust fluctuation caused by the positioning force and the thrust fluctuation caused by the operating current can be suppressed, so that the final output thrust fluctuation of the linear motor is better. Comprehensive and effective suppression.
  • FIG. 2 is a schematic flowchart of another method for suppressing thrust fluctuations of a linear motor provided by an embodiment of the present invention. As shown in FIG. 2 , the method can be performed after the steps in the embodiment shown in FIG. 1 , and is used as an application manner for obtaining data in the embodiment shown in FIG. 1 .
  • the method includes:
  • mapping relationship I 0X between the current and the position data corresponding to the positioning force of the linear motor and the mapping relationship I bX between the current and the position data corresponding to the thrust fluctuation caused by the operating current I b , determine the corresponding operation current I b
  • the mapping relationship between the compensation current and the position data I b0X is the mapping relationship between the compensation current and the position data I b0X .
  • mapping relationship I b0X obtain the current compensation value I′ bX corresponding to the above-mentioned operating current I b at a specific position during the operation of the above-mentioned linear motor.
  • the executive body of the embodiment of the present invention may be a linear motor thrust fluctuation suppression device, and the linear motor thrust fluctuation suppression device can suppress the thrust fluctuation generated by the linear motor.
  • the linear motor can implement the implementation of the present invention. steps in the example. It can also be a linear motor including a linear motor component and a control system, wherein the control system includes the mapping relationship obtained by the method in the embodiment shown in FIG. 1 .
  • control system can obtain the compensation corresponding to the operating current I b based on the mapping relationship I 0X of the current corresponding to the positioning force and the position data and the mapping relationship I bX of the current and the position data corresponding to the thrust fluctuation caused by the operating current I b
  • the mapping relationship between current and position data is used to calculate the current compensation value corresponding to any operating current I b proportional to the thrust fluctuation of the linear motor, and use the current compensation value to compensate the operating current to suppress the thrust fluctuation of the linear motor.
  • the device for suppressing the thrust fluctuation of the linear motor may be a system including a linear motor, or may be an electronic device, and the electronic device may be a terminal device, including but not limited to laptop computers, tablet computers, etc. Such as other portable devices or desktop computers, including software emulation in this case to perform the steps in the embodiments of the present invention.
  • the current compensation value current I′ bX corresponding to any operating current I b of the linear motor at a specific position can be obtained, and thrust fluctuation can be suppressed by means of pre-compensation.
  • mapping relationship between the current corresponding to the positioning force and the position data is expressed as I 0X
  • mapping relationship between the current and the position data corresponding to the thrust fluctuation caused by the operating current I b is expressed as I bX .
  • the motor can be controlled to move the corresponding position.
  • the obtained data set uses the interpolation method as the compensation value of the operating current. This method can be used to a certain extent.
  • the thrust fluctuation of the linear motor is suppressed. But only the thrust fluctuations caused by the positioning force of the linear motor are compensated.
  • the amplitude change of the operating current is also an important factor affecting the thrust fluctuation of the linear motor. If this factor is not compensated and corrected, it will eventually affect the output thrust effect of the linear motor, so that the thrust fluctuation has not been effectively suppressed.
  • mapping relationship I 0X between the current corresponding to the positioning force and the position data and the mapping relationship I bX between the current and the position data corresponding to the thrust fluctuation caused by the operating current I b are obtained through the foregoing steps.
  • I 0X and the mapping relationship I bX determine the mapping relationship I b0X between the compensation current corresponding to the operating current I b and the position data, and then according to the mapping relationship I b0X , obtain the description in the operation process of the linear motor.
  • the target current value I b_total the linear motor is driven by the target current value to suppress the thrust fluctuation of the linear motor, and the mapping relationship can be used to compensate any operating current when the linear motor is working, and at the same time, the positioning The thrust fluctuation caused by the force and the thrust fluctuation caused by the operating current are suppressed, so that the final linear motor output thrust fluctuation can be suppressed more comprehensively and effectively.
  • the embodiment of the present invention further discloses a device for suppressing the thrust fluctuation of the linear motor.
  • the device 300 for suppressing the thrust fluctuation of the linear motor includes:
  • the acquisition module 310 is used to acquire the mapping relationship N I of the thrust and the current of the linear motor; acquire the mapping relationship I 0X of the current and the position data corresponding to the positioning force of the linear motor;
  • the acquisition module 310 is further configured to acquire the mapping relationship I aX between the current and the position data corresponding to the thrust fluctuation caused by the test current I a of the linear motor;
  • the processing module 320 is configured to obtain, according to the mapping relationship I aX , the mapping relationship I bX between the current and the position data corresponding to the thrust fluctuation caused by the operating current I b ;
  • the processing module 320 is further configured to store the mapping relationship I 0X and the mapping relationship I bX in the control system of the linear motor, so as to be used to calculate the current compensation value I of the operating current I b of the linear motor. ' bX , so as to suppress the thrust fluctuation of the linear motor.
  • the device 300 for suppressing the thrust fluctuation of the linear motor further includes a compensation module 330 and a control module 340;
  • the above compensation module 330 is used for:
  • mapping relationship I b0X obtain the current compensation value I′ bX corresponding to the above-mentioned operating current I b at a specific position during the operation of the above-mentioned linear motor;
  • control module 340 is used for:
  • each step involved in the method shown in FIG. 1 and FIG. 2 may be performed by each module in the apparatus 300 for suppressing thrust fluctuation of a linear motor shown in FIG. 3 , which is not repeated here. Repeat.
  • the device 300 for suppressing the thrust fluctuation of the linear motor in the embodiment of the present invention can obtain the mapping relationship N I between the thrust and the current of the linear motor; obtain the current corresponding to the positioning force of the linear motor The mapping relationship I 0X with the position data; Obtain the mapping relationship I aX of the current corresponding to the thrust fluctuation caused by the test current I a of the linear motor and the position data; According to the mapping relationship I aX , obtain the operating current I b caused by The mapping relationship I bX of the current corresponding to the thrust fluctuation and the position data; the mapping relationship I 0X and the mapping relationship I bX are stored in the control system of the linear motor for calculating the operation of the linear motor The current compensation value I'bX of the current Ib is used to suppress the thrust fluctuation of the linear motor.
  • This mapping relationship can be used to compensate any operating current when the linear motor is working, and meanwhile, the thrust fluctuation and operating current caused by the positioning force can be compensated.
  • the resulting thrust fluctuations are suppressed, so that the final linear motor output thrust fluctuations can be more comprehensively and effectively suppressed.
  • embodiments of the present invention further provide a linear motor.
  • the linear motor includes at least a linear motor component and a control system.
  • the control system includes reference data obtained by the method of the embodiment shown in FIG. 1 , including the mapping relationship I 0X between the current corresponding to the positioning force and the position data and the operating current I b caused by The mapping relationship I bX between the current and position data corresponding to the thrust fluctuation of The value I'bX compensates said operating current Ib .
  • Embodiments of the present invention further provide a computer storage medium (Memory), where the computer storage medium is a memory device in a terminal, used to store programs and data.
  • the computer storage medium here may include both a built-in storage medium in the terminal, and certainly also an extended storage medium supported by the terminal.
  • the computer storage medium provides storage space, and the storage space stores the operating system of the terminal.
  • one or more instructions suitable for being loaded and executed by the processor are also stored in the storage space, and these instructions may be one or more computer programs (including program codes).
  • the computer storage medium here can be a high-speed RAM memory, or a non-volatile memory (non-volatile memory), such as at least one disk memory; optionally, it can also be at least one memory located far away from the aforementioned processor. computer storage media.
  • one or more instructions stored in the computer storage medium can be loaded and executed by the processor to implement the corresponding steps in the foregoing embodiment; in specific implementation, one or more instructions in the computer storage medium can be configured by The processor loads and executes any steps of the method in FIG. 1 and/or FIG. 2 , which will not be repeated here.
  • the disclosed systems, devices and methods may be implemented in other manners.
  • the division of the module is only for one logical function division.
  • multiple modules or components may be combined or integrated into another system, or some features may be ignored or not implement.
  • the shown or discussed mutual coupling, or direct coupling, or communication connection may be through some interfaces, indirect coupling or communication connection of devices or modules, and may be in electrical, mechanical or other forms.
  • Modules described as separate components may or may not be physically separated, and components shown as modules may or may not be physical modules, that is, they may be located in one place, or may be distributed to multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • the above-mentioned embodiments it may be implemented in whole or in part by software, hardware, firmware or any combination thereof.
  • software it can be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general purpose computer, special purpose computer, computer network, or other programmable device.
  • the computer instructions may be stored in or transmitted over a computer-readable storage medium.
  • the computer instructions can be sent from one website site, computer, server, or data center to another by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.)
  • wire e.g. coaxial cable, fiber optic, digital subscriber line (DSL)
  • wireless e.g., infrared, wireless, microwave, etc.
  • the computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc., that includes one or more available media integrated.
  • the available media may be read-only memory (ROM), or random access memory (RAM), or magnetic media, such as floppy disks, hard disks, magnetic tapes, magnetic disks, or optical media, such as, A digital versatile disc (DVD), or a semiconductor medium, for example, a solid state disk (SSD) and the like.
  • ROM read-only memory
  • RAM random access memory
  • magnetic media such as floppy disks, hard disks, magnetic tapes, magnetic disks, or optical media, such as, A digital versatile disc (DVD), or a semiconductor medium, for example, a solid state disk (SSD) and the like.

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Abstract

一种直线电机推力波动的抑制方法、相关设备和介质，其中方法包括：获取所述直线电机的推力与电流的映射关系N I；获取所述直线电机的定位力对应的电流与位置数据的映射关系I 0X（101）；获取所述直线电机由测试电流I a引起的推力波动所对应的电流与位置数据的映射关系I aX（102）；根据所述映射关系I aX，获得操作电流I b引起的推力波动所对应的电流与位置数据的映射关系I bX（103）；将所述映射关系I 0X和所述映射关系I bX存储于所述直线电机的控制系统，以用于计算所述直线电机的操作电流I b的电流补偿值I' bX，以实现抑制所述直线电机的推力波动（104）。

Description

一种直线电机推力波动的抑制方法、相关设备和介质 技术领域
本发明涉及直线电机技术领域，尤其涉及一种直线电机推力波动的抑制方法、相关设备和介质。
背景技术
直线电机是一种将电能直接转换成直线运动机械能，而不需要任何中间转换机构的传动装置。它可以看成是一台旋转电机按径向剖开，并展成平面而成。
直线电机的推力波动是其应用方面的主要缺陷之一，因为推力波动是电机振动与噪音产生的原因，特别是在低速运行时，还可能引起共振，影响使用效果。
在直线电机的设计中，减小推力波动是其主要目标之一，常用的方法有：控制电机移动相应的位置，通过采集此间的电流和位置信息，根据采集到的数据集计算操作电流的补偿值，但是该方式仅能够补偿直线电机由于定位力而引起的推力波动，在电机结构中还存在其他各种因素引起的推力波动，未得到有效抑制。
发明内容
基于此，有必要针对上述问题，提供一种直线电机推力波动的抑制方法、相关设备和介质，用于解决直线电机中产生的推力波动无法得到有效抑制，影响直线电机工作效果的问题。
本发明的技术方案如下：
一方面，提供了一种直线电机推力波动的抑制方法，包括：
步骤S0：获取所述直线电机的推力与电流的映射关系N I；
步骤S1：获取所述直线电机的定位力对应的电流与位置数据的映射关系I 0X；
步骤S2：获取所述直线电机由测试电流I a引起的推力波动所对应的电流与位置数据的映射关系I aX；
步骤S3：根据所述映射关系I aX，获得操作电流I b引起的推力波动所对应 的电流与位置数据的映射关系I bX；
步骤S4：将所述映射关系I 0X和所述映射关系I bX存储于所述直线电机的控制系统，以用于计算所述直线电机的操作电流I b的电流补偿值I′ bX，以实现抑制所述直线电机的推力波动。
可选的，所述步骤S1包括：
步骤S10：获取实验测得的所述直线电机的定位力与位置数据的映射关系F 0X；
步骤S11：根据所述映射关系N I和所述映射关系F 0X，获得所述映射关系I 0X。
可选的，所述步骤S1包括：
在所述直线电机水平安装的情况下，通过外力控制所述直线电机的动子匀速移动，采集所述移动过程中所述动子在不同位置所对应的所述直线电机的电流值，获得所述映射关系I 0X。
可选的，所述步骤S2包括：
步骤S20：获取仿真得到的所述直线电机在零电流情况下的第一推力波动与位置数据的映射关系F′ 0X；
步骤S21：获取仿真得到的所述直线电机在施加所述测试电流I a情况下的第二推力波动与位置数据的映射关系F′ aX；
步骤S22：根据所述映射关系F′ 0X和所述映射关系F′ aX，获得所述映射关系I aX。
可选的，所述步骤S22，包括：
步骤S220：将所述映射关系F′ 0X和所述映射关系F′ aX中，相同位置数据所对应的所述第二推力波动减去所述第一推力波动，以获得推力波动差值与所述各个位置数据的映射关系F aX；
步骤S221：根据所述映射关系F aX和所述映射关系N I获得所述映射关系I aX。
可选的，所述步骤S3包括：
根据以下关系等式获得所述映射关系I bX：
所述操作电流I b引起的推力波动所对应的电流与位置数据的映射关系等于，所述映射关系I aX，乘以所述操作电流I b与所述测试电流I a的比值。
可选的，所述步骤S4包括：
S40：根据所述映射关系I 0X和所述映射关系I bX，确定所述操作电流I b所对应的补偿电流与位置数据的映射关系I b0X；
S41：根据所述映射关系I b0X，获得所述直线电机运行过程中所述操作电流I b在具体位置处所对应的电流补偿值I′ bX；
S42：将所述电流补偿值I′ bX与所述操作电流I b之和作为所述直线电机运行过程中在具体位置处对应的目标电流值I b_total；
S43：用所述目标电流值驱动所述直线电机运动实现对所述直线电机的推力波动的抑制。
另一方面，提供了一种直线电机推力波动的抑制装置，包括：
获取模块，用于获取所述直线电机的推力与电流的映射关系N I；获取所述直线电机的定位力对应的电流与位置数据的映射关系I 0X；
所述获取模块还用于，获取所述直线电机由测试电流I a引起的推力波动所对应的电流与位置数据的映射关系I aX；
处理模块，用于根据所述映射关系I aX，获得操作电流I b引起的推力波动所对应的电流与位置数据的映射关系I bX；
所述处理模块还用于，将所述映射关系I 0X和所述映射关系I bX存储于所述直线电机的控制系统，以用于计算所述直线电机操作电流I b的电流补偿值I′ bX，以实现抑制所述直线电机的推力波动。
另一方面，提供了一种直线电机，包括直线电机部件和控制系统，所述控制系统包括如上述第一方面及其任一种可能的实现方式获得的参考数据，包括定位力对应的电流与位置数据的映射关系I 0X和操作电流I b引起的推力波动所对应的电流与位置数据的映射关系I bX，所述控制系统用于基于所述参考数据计算与所述直线电机的推力波动成正比的操作电流的电流补偿值I′ bX，并使用所述电流补偿值I′ bX对所述操作电流进行补偿。
另一方面，提供了一种存储介质，所述存储介质存储有计算机指令程序，所述计算机指令程序被处理器加载并执行如上述第一方面及其任一种可能的实现方式的步骤。
本发明的有益效果在于：通过仿真或测试进行数据整合和推导可得到某一电流下的因操作电流引起的推力波动所对应的电流与位置的映射关系，并获取 直线电机的定位力对应的电流与位置数据的映射关系I 0X，将定位力对应的电流与位置数据的映射关系I 0X和操作电流I b引起的推力波动所对应的电流与位置数据的映射关系I bX存储于直线电机的控制系统，可以在直线电机工作时利用该映射关系计算补偿电流值以对任意位置处的操作电流进行补偿，使最终直线电机输出的推力波动得到有效抑制。
附图说明
图1为本发明提供的一种直线电机推力波动的抑制方法的流程示意图；
图2为本发明提供的另一种直线电机推力波动的抑制方法的流程示意图；
图3为本发明提供的一种直线电机推力波动的抑制装置的结构示意图。
具体实施方式
为了使本技术领域的人员更好地理解本发明方案，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本发明的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别不同对象，而不是用于描述特定顺序。此外，术语“包括”和“具有”以及它们任何变形，意图在于覆盖不排他的包含。例如包含了一系列步骤或单元的过程、方法、系统、产品或设备没有限定于已列出的步骤或单元，而是可选地还包括没有列出的步骤或单元，或可选地还包括对于这些过程、方法、产品或设备固有的其他步骤或单元。
在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本发明的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
本发明实施例中提到的直线电机是一种将电能直接转换成直线运动机械能，而不需要任何中间转换机构的传动装置。它可以看成是一台旋转电机按径向剖开，并展成平面而成。直线电机也称线性电机、线性马达、直线马达、推杆马达等。
一般由定子演变而来的一侧称为初级，由动子(转子)演变而来的一侧称为次级。在实际应用时，将初级和次级制造成不同的长度，以保证在所需行程范围内初级与次级之间的耦合保持不变。直线电机可以是短初级长次级，也可以是长初级短次级。考虑到制造成本、运行费用，以直线感应电动机为例：当初级绕组通入交流电源时，便在气隙中产生行波磁场，次级在行波磁场切割下，将感应出电动势并产生电流，该电流与气隙中的磁场相作用就产生电磁推力。
本发明实施例中涉及到的直线电机的位置数据、位置信息或者位置移动等术语，均可以理解为是针对直线电机的动子，即该动子的移动、位置等。
下面结合本发明实施例中的附图对本发明实施例进行描述。
请参阅图1，图1是本发明实施例提供的一种直线电机推力波动的抑制方法的流程示意图。该方法可包括：
101、获取上述直线电机的推力与电流的映射关系N I；获取上述直线电机的定位力对应的电流与位置数据的映射关系I 0X。
本发明实施例的执行主体可以为一种直线电机推力波动的抑制装置，该直线电机推力波动的抑制装置可以对直线电机产生的推力波动进行抑制，或者说，可以为直线电机建立推力波动抑制的模型。在可选的实施方式中，上述直线电机推力波动的抑制装置可以为包括直线电机的系统，也可以为电子设备，上述电子设备可以为终端设备，包括但不限于诸如膝上型计算机、平板计算机之类的其它便携式设备或者台式计算机。
在永磁电机中，即使定子绕组没有激励，也存在电磁转矩，此电磁转矩称之为定位力矩，或者是齿槽转矩/磁阻转矩。其中，该直线电机的定位力对应的电流与位置数据的映射关系可以表示为直线电机的定位力曲线，可以根据实际测试统计或者仿真测试获得。
在一种可选的实施方式中，上述步骤101具体可包括：
获取实验测得的上述直线电机的定位力与位置数据的映射关系F 0X；
根据上述直线电机的推力与电流的映射关系N I，和上述映射关系F 0X，获得上述映射关系I 0X。
其中，直线电机推力与电流的映射关系是直线电机的一类特征参数，可以是根据测试获得仿真获得的，也可以是直线电机中存储的信息，此处不做限制。本发明实施例中可以通过实验测得电机的定位力与位置数据的映射关系，再具体根据电机推力与电流的映射关系，推导获得定位力对应的电流-位置数据，可以表示为I 0X(X表示位置数据，可以为不同位置)。
可选的，上述步骤101具体还可以包括：
在上述直线电机水平安装的情况下，控制上述直线电机的动子匀速移动，采集上述移动过程中上述动子在不同位置所对应的上述直线电机的电流值，获得上述定位力对应的电流与位置数据的映射关系I 0X。
具体的，可以在直线电机水平安装的情况下，控制该直线电机匀速、缓慢地移动相应的位置行程，并在此过程中检测到其电流和位置信息，检测到的电流值正好为特定位置(X)下的定位力所对应的电流值，即获得I 0X。
102、获取上述直线电机由测试电流I a引起的推力波动所对应的电流与位置数据的映射关系I aX。
上述测试电流可以为任意非零的电流值，可选的，由测试电流引起的推力波动所对应的电流与位置数据的映射关系可以通过测试获得，在测试中需要考虑其中定位力引起的推力波动的影响，以获得仅由测试电流引起的推力波动所对应的数据。
在一种可选的实施方式中，上述步骤102可包括：
1021、获取仿真得到的上述直线电机在零电流情况下的第一推力波动与位置数据的映射关系F′ 0X，和上述直线电机在施加上述测试电流I a情况下的第二推力波动与位置数据的映射关系F′ aX；
1022、根据上述映射关系F′ 0X和上述映射关系F′ aX，获得上述映射关系I aX。
其中，直线电机0电流下的推力波动即可以看作定位力引起的推力波动。可以分别仿真获得直线电机在零电流情况下和一个预设的测试电流I a情况下的推力波动，以及推力波动对应的位置数据，通过对两组推力波动与位置数据的映射关系(第一推力波动与位置数据的映射关系和第二推力波动与位置数据 的映射关系)进行分析推导处理，去除定位力引起的推力波动的影响，可以获得仅由特定的测试电流(电流值即为I a)引起的推力波动所对应的电流与位置数据的映射关系I aX。
具体的，上述步骤1022可包括：
将上述映射关系F′ 0X和上述映射关系F′ aX中，相同位置数据所对应的上述第二推力波动减去上述第一推力波动，以获得以获得推力波动差值与上述各个位置数据的映射关系F aX；
根据上述映射关系F aX和上述映射关系N I获得所述映射关系I aX。
进一步具体的，通过仿真得到该款直线电机0电流下的第一推力波动与位置数据的映射关系F′ 0X，和某一非0电流(记为I a)下的第二推力波动与位置数据的映射关系F′ aX，相减可以得到该特定的测试电流I a下对应的仅因电流引起的推力-位置数据F aX＝F′ aX-F′ 0X，并根据上述映射关系N I可以获得因上述测试电流引起的推力波动所对应的电流与位置数据的映射关系I aX。
103、根据上述映射关系I aX，获得操作电流I b引起的推力波动所对应的电流与位置数据的映射关系I bX。
本发明实施例中根据该直线电机推力和电流之间关系，可以推导计算得到由具体的操作电流I b引起的推力波动对应的电流-位置数据，为I bX。可以是先获得多组由不同电流值引起的推力波动所对应的电流-位置数据，再进行整合获得的。
在一种实施方式中，可根据以下关系等式获得上述映射关系I bX：
上述操作电流I b引起的推力波动所对应的电流与位置数据的映射关系等于，由上述映射关系I aX，乘以上述操作电流I b与上述测试电流I a的比值。
具体的，任意操作电流I b引起的推力波动对应的电流与位置数据的映射关系，为I bX＝I b/I a·I aX。
通过该映射关系I bX，可以在已知该直线电机的操作电流时，确定由该操作电流引起的推力波动所对应的电流补偿。
104、将上述映射关系I 0X和上述映射关系I bX存储于上述直线电机的控制系统，以用于计算与上述直线电机的操作电流I b的电流补偿值I′ bX，以实现抑制上述直线电机的推力波动。
在获得定位力对应的电流与位置数据的映射关系I 0X，和操作电流I b引起的推力波动所对应的电流与位置数据的映射关系I bX之后，可以整合为操作电流I b所对应的补偿电流与位置数据的映射关系I b0X，即包括了对定位力和操作电流引起的推力波动的电流补偿，存储在直线电机的控制系统中。
具体的，可以将I b0X＝I bX+I 0X作为相应的电流与位置的映射数据集，插值进入直线电机控制系统，用于计算操作电流I b在具体位置处所对应的电流补偿值I′ bX，将电流补偿值I′ bX与操作电流I b之和作为直线电机运行过程中在具体位置处对应的目标电流值I b_total，来抑制直线电机中定位力和操作电流引起的推力波动。
本发明通过上述步骤获得直线电机的定位力对应的电流与位置数据的映射关系I 0X和操作电流I b引起的推力波动所对应的电流与位置数据的映射关系I bX，将其存储于直线电机的控制系统，可以在直线电机工作时利用该上述映射关系对任意操作电流进行补偿，同时对定位力引起的推力波动和操作电流引起的推力波动进行了抑制，使最终直线电机输出推力波动得到更全面有效的抑制。
为了更清楚地说明本发明实施例中的技术方案，可以参阅图2，图2是本发明实施例提供的另一种直线电机推力波动的抑制方法的流程示意图。如图2所示，该方法可以在图1所示实施例中的步骤之后执行，并作为图1所示实施例获得数据的一种应用方式。该方法包括：
201、根据直线电机的定位力对应的电流与位置数据的映射关系I 0X，和操作电流I b引起的推力波动所对应的电流与位置数据的映射关系I bX，确定上述操作电流I b所对应的补偿电流与位置数据的映射关系I b0X。
202、根据上述映射关系I b0X，获得上述直线电机运行过程中上述操作电流I b在具体位置处所对应的电流补偿值I′ bX。
203、将上述电流补偿值I′ bX与上述操作电流I b之和作为上述直线电机运行过程中在具体位置处对应的目标电流值I b_total，用上述目标电流值驱动上述直线电机运动实现对上述直线电机的推力波动的抑制。
本发明实施例的执行主体可以为一种直线电机推力波动的抑制装置，该直线电机推力波动的抑制装置可以对直线电机产生的推力波动进行抑制，具体 的，其中的直线电机可以执行本发明实施例中的步骤。还可以为一种包括直线电机部件和控制系统的直线电机，其中控制系统包括如图1所示实施例中方法获得的映射关系。即该控制系统可以基于定位力对应的电流与位置数据的映射关系I 0X和操作电流I b引起的推力波动所对应的电流与位置数据的映射关系I bX，获得操作电流I b所对应的补偿电流与位置数据的映射关系，以计算与直线电机的推力波动成正比的任意操作电流I b对应的电流补偿值，并使用电流补偿值对操作电流进行补偿，抑制直线电机的推力波动。
在可选的实施方式中，上述直线电机推力波动的抑制装置可以为包括直线电机的系统，也可以为电子设备，上述电子设备可以为终端设备，包括但不限于诸如膝上型计算机、平板计算机之类的其它便携式设备或者台式计算机，在此种情形中包括软件仿真方式执行本发明实施例中的步骤。
在图1所示实施例步骤的基础上，可以获得直线电机在任意操作电流I b在具体位置处所对应的电流补偿值电流I′ bX，通过预先补偿的方式来抑制推力波动。
其中，定位力对应的电流与位置数据的映射关系表示为I 0X，操作电流I b引起的推力波动所对应的电流与位置数据的映射关系表示为I bX。
可以将I b0X＝I bX+I 0X，作为完整的补偿电流计算规则，计算操作电流的补偿值，具体来说，该直线电机运行时，针对任意操作电流值I b，可以根据操作电流I b所对应的补偿电流与位置数据的映射关系I b0X，获得直线电机运行过程中该操作电流I b在具体位置处所对应的电流补偿值I′ bX，以在具体位置X补偿特定的电流补偿值I′ bX，则最终电机实际运行的电流I b_total＝I b+I′ bX。
在考虑定位力引起的推力波动抑制时，可以控制电机移动相应的位置，通过采集此间的电流和位置信息，将得到的数据集使用插值的方法作为操作电流的补偿值，这种方法可以一定程度上抑制直线电机的推力波动。但是仅补偿了直线电机由于定位力而引起的推力波动。在直线电机中，操作电流的幅值变化也是影响直线电机推力波动的一个重要原因，若不对此因素进行补偿校正，将最终影响直线电机输出推力效果，使其推力波动仍未得到有效抑制。
而本发明实施例通过前述步骤获得定位力对应的电流与位置数据的映射关系I 0X和操作电流I b引起的推力波动所对应的电流与位置数据的映射关系 I bX，可根据所述映射关系I 0X和所述映射关系I bX，确定所述操作电流I b所对应的补偿电流与位置数据的映射关系I b0X，再根据所述映射关系I b0X，获得所述直线电机运行过程中所述操作电流I b在具体位置处所对应的电流补偿值I′ bX，然后将所述电流补偿值I′ bX与所述操作电流I b之和作为所述直线电机运行过程中在具体位置处对应的目标电流值I b_total，用所述目标电流值驱动所述直线电机运动实现对所述直线电机的推力波动的抑制，可以在直线电机工作时利用该映射关系对任意操作电流进行补偿，同时对定位力引起的推力波动和操作电流引起的推力波动进行了抑制，使最终直线电机输出推力波动得到更全面有效的抑制。
基于上述直线电机推力波动的抑制方法实施例的描述，本发明实施例还公开了一种直线电机推力波动的抑制装置。请参见图3，直线电机推力波动的抑制装置300包括：
获取模块310，用于获取所述直线电机的推力与电流的映射关系N I；获取所述直线电机的定位力对应的电流与位置数据的映射关系I 0X；
所述获取模块310还用于，获取所述直线电机由测试电流I a引起的推力波动所对应的电流与位置数据的映射关系I aX；
处理模块320，用于根据所述映射关系I aX，获得操作电流I b引起的推力波动所对应的电流与位置数据的映射关系I bX；
所述处理模块320还用于，将所述映射关系I 0X和所述映射关系I bX存储于所述直线电机的控制系统，以用于计算所述直线电机操作电流I b的电流补偿值I′ bX，以实现抑制所述直线电机的推力波动。
可选的，上述直线电机推力波动的抑制装置300还包括补偿模块330和控制模块340；
上述补偿模块330，用于：
根据上述映射关系I b0X，获得上述直线电机运行过程中上述操作电流I b在具体位置处所对应的电流补偿值I′ bX；
上述控制模块340用于：
将上述电流补偿值I′ bX与上述操作电流I b之和作为上述直线电机运行过程中在具体位置处对应的目标电流值I b_total；
用上述目标电流值驱动上述直线电机运动实现对上述直线电机的推力波动的抑制。
据本发明的一个实施例，图1和图2所示的方法所涉及的各个步骤均可以是由图3所示的直线电机推力波动的抑制装置300中的各个模块执行的，此处不再赘述。
本发明实施例中的直线电机推力波动的抑制装置300，直线电机推力波动的抑制装置300可以获取所述直线电机的推力与电流的映射关系N I；获取所述直线电机的定位力对应的电流与位置数据的映射关系I 0X；获取所述直线电机由测试电流I a引起的推力波动所对应的电流与位置数据的映射关系I aX；根据所述映射关系I aX，获得操作电流I b引起的推力波动所对应的电流与位置数据的映射关系I bX；将所述映射关系I 0X和所述映射关系I bX存储于所述直线电机的控制系统，以用于计算所述直线电机的操作电流I b的电流补偿值I′ bX，以实现抑制所述直线电机的推力波动，可以在直线电机工作时利用该映射关系对任意操作电流进行补偿，同时对定位力引起的推力波动和操作电流引起的推力波动进行了抑制，使最终直线电机输出推力波动得到更全面有效的抑制。
基于上述方法实施例以及装置实施例的描述，本发明实施例还提供一种直线电机。该直线电机至少包括直线电机部件和控制系统，该控制系统包括如图1所示实施例的方法获得的参考数据，包括定位力对应的电流与位置数据的映射关系I 0X和操作电流I b引起的推力波动所对应的电流与位置数据的映射关系I bX，所述控制系统用于基于所述参考数据计算所述直线电机操作电流I b的电流补偿值I′ bX，并使用所述电流补偿值I′ bX对所述操作电流I b进行补偿。
本发明实施例还提供了一种计算机存储介质(Memory)，上述计算机存储介质是终端中的记忆设备，用于存放程序和数据。可以理解的是，此处的计算机存储介质既可以包括终端中的内置存储介质，当然也可以包括终端所支持的扩展存储介质。计算机存储介质提供存储空间，该存储空间存储了终端的操作系统。并且，在该存储空间中还存放了适于被处理器加载并执行的一条或多条的指令，这些指令可以是一个或一个以上的计算机程序(包括程序代码)。需要说明的是，此处的计算机存储介质可以是高速RAM存储器，也可以是非不稳定的存储器(non-volatile memory)，例如至少一个磁盘存储器；可选的还可 以是至少一个位于远离前述处理器的计算机存储介质。
在一个实施例中，可由处理器加载并执行计算机存储介质中存放的一条或多条指令，以实现上述实施例中的相应步骤；具体实现中，计算机存储介质中的一条或多条指令可以由处理器加载并执行图1和/或图2中方法的任意步骤，此处不再赘述。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的装置和模块的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本发明所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，该模块的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如，多个模块或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。所显示或讨论的相互之间的耦合、或直接耦合、或通信连接可以是通过一些接口，装置或模块的间接耦合或通信连接，可以是电性，机械或其它的形式。
作为分离部件说明的模块可以是或者也可以不是物理上分开的，作为模块显示的部件可以是或者也可以不是物理模块，即可以位于一个地方，或者也可以分布到多个网络模块上。可以根据实际的需要选择其中的部分或者全部模块来实现本实施例方案的目的。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。该计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行该计算机程序指令时，全部或部分地产生按照本发明实施例的流程或功能。该计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。该计算机指令可以存储在计算机可读存储介质中，或者通过该计算机可读存储介质进行传输。该计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。该计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设 备。该可用介质可以是只读存储器(read-only memory，ROM)，或随机存储存储器(random access memory，RAM)，或磁性介质，例如，软盘、硬盘、磁带、磁碟、或光介质，例如，数字通用光盘(digital versatile disc，DVD)、或者半导体介质，例如，固态硬盘(solid state disk，SSD)等。

Claims (10)

  1. 一种直线电机推力波动的抑制方法，其特征在于，包括：
    步骤S0：获取所述直线电机的推力与电流的映射关系N I；
    步骤S1：获取所述直线电机的定位力对应的电流与位置数据的映射关系I 0X；
    步骤S2：获取所述直线电机由测试电流I a引起的推力波动所对应的电流与位置数据的映射关系I aX；
    步骤S3：根据所述映射关系I aX，获得操作电流I b引起的推力波动所对应的电流与位置数据的映射关系I bX；
    步骤S4：将所述映射关系I 0X和所述映射关系I bX存储于所述直线电机的控制系统，以用于计算所述直线电机的操作电流I b的电流补偿值I′ bX，以实现抑制所述直线电机的推力波动。
  2. 根据权利要求1所述的直线电机推力波动的抑制方法，其特征在于，所述步骤S1包括：
    步骤S10：获取实验测得的所述直线电机的定位力与位置数据的映射关系F 0X；
    步骤S11：根据所述映射关系N I和所述映射关系F 0X，获得所述映射关系I 0X。
  3. 根据权利要求1所述的直线电机推力波动的抑制方法，其特征在于，所述步骤S1包括：
    在所述直线电机水平安装的情况下，通过外力控制所述直线电机的动子匀速移动，采集所述移动过程中所述动子在不同位置所对应的所述直线电机的电流值，获得所述映射关系I 0X。
  4. 根据权利要求1-3任一项所述的直线电机推力波动的抑制方法，其特征在于，所述步骤S2包括：
    步骤S20：获取仿真得到的所述直线电机在零电流情况下的第一推力波动与位置数据的映射关系F′ 0X；
    步骤S21：获取仿真得到的所述直线电机在施加所述测试电流I a情况下的第二推力波动与位置数据的映射关系F′ aX；
    步骤S22：根据所述映射关系F′ 0X和所述映射关系F′ aX，获得所述映射关系I aX。
  5. 根据权利要求4所述的直线电机推力波动的抑制方法，其特征在于，所述步骤S22，包括：
    步骤S220：将所述映射关系F′ 0X和所述映射关系F′ aX中，相同位置数据所对应的所述第二推力波动减去所述第一推力波动，以获得推力波动差值与所述各个位置数据的映射关系F aX；
    步骤S221：根据所述映射关系F aX和所述映射关系N I获得所述映射关系I aX。
  6. 根据权利要求4所述的直线电机推力波动的抑制方法，所述步骤S3包括：
    根据以下关系等式获得所述映射关系I bX：
    所述操作电流I b引起的推力波动所对应的电流与位置数据的映射关系I bX等于，所述映射关系I aX乘以所述操作电流I b与所述测试电流I a的比值。
  7. 根据权利要求4所述的直线电机推力波动的抑制方法，其特征在于，所述步骤S4包括：
    S40：根据所述映射关系I 0X和所述映射关系I bX，确定所述操作电流I b所对应的补偿电流与位置数据的映射关系I b0X；
    S41：根据所述映射关系I b0X，获得所述直线电机运行过程中所述操作电流I b在具体位置处所对应的电流补偿值I′ bX；
    S42：将所述电流补偿值I′ bX与所述操作电流I b之和作为所述直线电机运行过程中在具体位置处对应的目标电流值I b_total；
    S43：用所述目标电流值驱动所述直线电机运动实现对所述直线电机的推力波动的抑制。
  8. 一种直线电机推力波动的抑制装置，其特征在于，包括：
    获取模块，用于获取所述直线电机的推力与电流的映射关系N I；获取所述直线电机的定位力对应的电流与位置数据的映射关系I 0X；
    所述获取模块还用于，获取所述直线电机由测试电流I a引起的推力波动所对应的电流与位置数据的映射关系I aX；
    处理模块，用于根据所述映射关系I aX，获得操作电流I b引起的推力波动所对应的电流与位置数据的映射关系I bX；
    所述处理模块还用于，将所述映射关系I 0X和所述映射关系I bX存储于所述直线电机的控制系统，以用于计算所述直线电机操作电流I b的电流补偿值I′ bX，以实现抑制所述直线电机的推力波动。
  9. 一种直线电机，其特征在于，包括直线电机部件和控制系统，所述控制系统包括如权利要求1-7任一项所述方法获得的参考数据，所述参考数据包括定位力对应的电流与位置数据的映射关系I 0X和操作电流I b引起的推力波动所对应的电流与位置数据的映射关系I bX，所述控制系统用于基于所述参考数据计算所述直线电机操作电流I b的电流补偿值I′ bX，并使用所述电流补偿值I′ bX对所述操作电流I b进行补偿。
  10. 一种存储介质，存储有计算机指令程序，其特征在于，所述计算机指令程序被处理器执行时，使得所述处理器执行如权利要求1至7中任一项所述方法的步骤。
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