WO2020034688A1 - 马达振动波的生成方法 - Google Patents

马达振动波的生成方法 Download PDF

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WO2020034688A1
WO2020034688A1 PCT/CN2019/087697 CN2019087697W WO2020034688A1 WO 2020034688 A1 WO2020034688 A1 WO 2020034688A1 CN 2019087697 W CN2019087697 W CN 2019087697W WO 2020034688 A1 WO2020034688 A1 WO 2020034688A1
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motor
signal
generating
vibration
vibration wave
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PCT/CN2019/087697
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French (fr)
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向征
邓瀚林
路翔
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瑞声声学科技(深圳)有限公司
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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
    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2218/00—Aspects of pattern recognition specially adapted for signal processing
    • G06F2218/08—Feature extraction
    • G06F2218/10—Feature extraction by analysing the shape of a waveform, e.g. extracting parameters relating to peaks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H1/00—Measuring characteristics of vibrations in solids by using direct conduction to the detector
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B3/00—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B6/00—Tactile signalling systems, e.g. personal calling systems
    • 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
    • H02P25/032—Reciprocating, oscillating or vibrating motors
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2218/00—Aspects of pattern recognition specially adapted for signal processing
    • G06F2218/02—Preprocessing
    • G06F2218/04—Denoising
    • 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
    • H02P2209/00—Indexing scheme relating to controlling arrangements characterised by the waveform of the supplied voltage or current
    • H02P2209/13—Different type of waveforms depending on the mode of operation

Definitions

  • the invention relates to the field of micro-electromechanical technology, and in particular, to a method for generating a vibration wave of a motor.
  • the invention provides a method for generating a vibration wave of a motor, which can automatically generate a vibration wave of a motor, and conveniently extract and obtain a desired vibration waveform.
  • the present invention provides a method for generating a motor vibration wave, including the following steps:
  • Step S1 Excite the motor by a white noise signal, and measure the vibration signal of the motor by an acceleration sensor;
  • Step S2 Obtain the impulse response of the system through the vibration signal acquired by the acceleration sensor;
  • Step S3 construct a desired vibration waveform
  • Step S4 performing Wiener inverse filtering on the vibration waveform obtained in step S3 to obtain a frequency domain signal
  • Step S5 Perform an inverse fast Fourier transform on the frequency domain signal obtained in step S4 to obtain an excitation signal in the time domain form.
  • the step S2 is to solve the impulse response h [n] of the system by solving the autocorrelation Rxx of the input noise signal and the cross-correlation Rxy of the input and output through the Wienerhof equation.
  • the step S3 is to draw a desired vibration waveform by dots or manually.
  • the unit duration of the desired vibration waveform is 5 ms to 15 ms.
  • the step S4 is to obtain an estimated value of the input f (x, y) of the degradation function H by solving the restoration function.
  • the frequency domain expression of the frequency domain signal is: Among them, * represents the signal conjugate, and P N (u, v) / P S (u, v) is the power ratio between noise and signal.
  • the P N (u, v) / P S (u, v) is a constant.
  • the present invention provides a method for generating a motor vibration wave including the following steps: Step S1: Excite the motor by a white noise signal, and measure the vibration signal of the motor by an acceleration sensor; Step S2: Obtain by an acceleration sensor Step S3: Construct a desired vibration waveform; Step S4: Perform Wiener inverse filtering on the vibration waveform obtained in Step S3 to obtain a frequency domain signal; Step S5: Quickly perform the frequency domain signal obtained in Step S4 The inverse Fourier transform obtains the excitation signal in the time domain form.
  • the method for generating a motor vibration wave provided by the present invention can be automatically generated, and it is convenient to extract and obtain a desired vibration waveform.
  • FIG. 1 is a flowchart of a method for generating a motor vibration wave according to the present invention
  • FIG. 2 is a schematic diagram of a Wiener inverse filtering method for generating a motor vibration wave according to the present invention.
  • the method for generating a motor vibration wave according to this embodiment is applied to a linear motor in a smart phone or a tablet computer, and the automatic motor waveform can be generated.
  • the method is simple and easy to extract.
  • the method for generating a motor vibration wave of the present invention includes the following steps:
  • Step S1 the white noise signal excites the motor: the motor is excited by the white noise signal, and the vibration signal of the motor is measured by the acceleration sensor;
  • Step S2 the motor system identification:
  • the impulse response h [n] of the system is solved by solving the autocorrelation Rxx of the input noise signal and the cross-correlation Rxy of the input and output.
  • the autocorrelation of the white noise is a pulse signal .
  • a desired vibration waveform is constructed: the desired vibration waveform is drawn by dots or manually, and preferably, the unit duration of the desired vibration waveform is 5 ms to 15 ms. Under such a unit time state, the constructed desired vibration waveform can achieve the best display effect.
  • Step S4 inverse Wiener filtering: perform inverse Wiener filtering on the vibration waveform obtained in step S3 to obtain a frequency-domain signal, that is, to obtain the estimated value of the input f (x, y) of the degradation function H by solving the restoration function
  • the frequency domain expression of the domain signal is: Among them, * represents the signal conjugate, P N (u, v) / P S (u, v) is the power ratio of noise and signal, specifically, the power ratio of noise and signal, P N (u, v) / P S (u, v) is constant.
  • Wiener inverse filtering is to obtain the estimated value of the input f (x, y) of the degradation function H by solving the restoration function, and consider g (x, y) as Is the desired amount of vibration.
  • the motor is regarded as a degradation function H, that is, an estimation of the excitation signal f (x, y) to obtain a frequency domain expression:
  • step S5 an excitation signal is generated: the frequency domain signal obtained in step S4 is subjected to an inverse fast Fourier transform (IFFT change, inverse fast Fourier transform) to obtain an excitation signal in the time domain form.
  • IFFT change inverse fast Fourier transform
  • the invention provides a method for generating a motor vibration wave, which includes the following steps: Step S1: Excite the motor by a white noise signal, and measure the vibration signal of the motor by an acceleration sensor; Step S2: Obtain a system pulse by using the vibration signal obtained by the acceleration sensor Response; step S3: construct the desired vibration waveform; step S4: perform Wiener inverse filtering on the vibration waveform obtained in step S3 to obtain a frequency domain signal; step S5: perform inverse fast Fourier transform on the frequency domain signal obtained in step S4 to obtain a time domain form The stimulus signal.
  • the method for generating a motor vibration wave provided by the present invention can be automatically generated, and it is convenient to extract and obtain a desired vibration waveform.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Theoretical Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Artificial Intelligence (AREA)
  • Signal Processing (AREA)
  • General Engineering & Computer Science (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

本发明提供了一种马达振动波的生成方法包括如下步骤：步骤S1：通过白噪声信号激励马达，并通过加速度传感器测量马达的振动信号；步骤S2：通过加速度传感器获取的振动信号得到系统的脉冲响应；步骤S3：构造期望振动波形；步骤S4：对步骤S3得到的振动波形进行维纳逆滤波得到频域信号；步骤S5：对步骤S4得到的频域信号进行快速傅立叶逆变换得到时域形式的激励信号。本发明提供的马达振动波的生成方法可以自动生成，且方便提取得到期望的振动波形。

Description

马达振动波的生成方法 技术领域
本发明涉及微机电领域，尤其涉及一种马达振动波的生成方法。
背景技术
近几年，线性谐振激励器(LRA)在智能手机、平板电脑等领域的应用越来越普及。这种激励器也称为马达，由于其对激励信号的响应快捷，容易实现更加优雅和舒适的触觉体验。很多时候，针对不同的应用场景，我们需要设计马达激励信号来得到期望的振动波形。但是现有技术对于马达振动波的提取很不方便。
因此，实有必要提供一种新的马达振动波的生成方法以解决上述问题。
发明内容
本发明提供一种马达振动波的生成方法，其可以自动生成马达的振动波，方便提取得到期望的振动波形。
为解决上述技术问题，本发明提供了一种马达振动波的生成方法，包括如下步骤：
步骤S1：通过白噪声信号激励马达，并通过加速度传感器测量马达的振动信号；
步骤S2：通过加速度传感器获取的振动信号得到系统的脉冲响应；
步骤S3：构造期望振动波形；
步骤S4：对步骤S3得到的振动波形进行维纳逆滤波得到频域信号；
步骤S5：对步骤S4得到的频域信号进行快速傅立叶逆变换得到时域形式的激励信号。
优选的，所述步骤S2为通过维纳霍夫方程，通过求解输入噪声信号的自相关Rxx和输入输出的互相关Rxy来求解系统的脉冲响应h[n]。
优选的，所述系统的脉冲响应为h[n]＝(1/sigma)*Rxy，其中sigma为白噪声的能量。
优选的，所述步骤S3为通过打点或者手工的方式绘制出期望振动波形。
优选的，所述期望振动波形的单位时长为5ms～15ms。
优选的，所述步骤S4为通过求解复原函数，得到退化函数H的输入f(x,y)的估计值。
优选的，所述频域信号的频域表达式为：
Figure PCTCN2019087697-appb-000001
其中，*表示信号共轭，P N(u,v)/P S(u,v)为噪声和信号的功率比。
优选的，所述P N(u,v)/P S(u,v)为常数。
相较于现有技术，本发明提供了一种马达振动波的生成方法包括如下步骤：步骤S1：通过白噪声信号激励马达，并通过加速度传感器测量马达的振动信号；步骤S2：通过加速度传感器获取的振动信号得到系统的脉冲响应；步骤S3：构造期望振动波形；步骤S4：对步骤S3得到的振动波形进行维纳逆滤波得到频域信号；步骤S5：对步骤S4得到的频域信号进行快速傅立叶逆变换得到时域形式的激励信号。本发明提供的马达振动波的生成方法可以自动生成，且方便提取得到期望的振动波形。
附图说明
图1为本发明马达振动波的生成方法的流程图；
图2为本发明马达振动波的生成方法的维纳逆滤波原理图。
具体实施方式
下面将结合附图和实施方式对本发明作进一步说明。
本实施方式的马达振动波的生成方法应用于在智能手机、平板电脑中的线性马达，可以实现马达自动波形的生成，方法简单，便于提取。
如图1所示，本发明的马达振动波的生成方法包括如下步骤：
步骤S1，白噪声信号激励马达：通过白噪声信号激励马达，并通过加速度传感器测量马达的振动信号；
步骤S2，马达系统识别：根据维纳霍夫方程，通过求解输入噪声信号的自相关Rxx和输入输出的互相关Rxy来求解系统的脉冲响应h[n]，由于白噪声的自相关为脉冲信号，直接可以得到系统的脉冲响应为h[n]＝(1/sigma)*Rxy，其中sigma为步骤S1采用的白噪声的能量值；
步骤S3，构造期望振动波形：通过打点或者手工的方式绘制出期望的振动波形，优选的，期望振动波形的单位时长为5ms～15ms。在这样的单位时长状态下，可以使得构造出的期望振动波形达到最佳的显示效果。
步骤S4，维纳逆滤波：对步骤S3得到的振动波形进行维纳逆滤波得到频域信号，即通过求解复原函数，得到退化函数H的输入f(x,y)的估计值，得到的频域信号的频域表达式为：
Figure PCTCN2019087697-appb-000002
其中，*表示信号共轭，P N(u,v)/P S(u,v)为噪声和信号的功率比，具体的，噪声和信号的功率比，P N(u,v)/P S(u,v)为常数。
如图2所示，为维纳逆滤波的原理示意图，维纳逆滤波即通过求解复原函数，得到退化函数H的输入f(x,y)的估计值，把g(x,y)看成是期望的振动量，马达看做退化函数H，即对激励信号f(x,y)的估计从而得到频域表达式：
Figure PCTCN2019087697-appb-000003
步骤S5，生成激励信号：对步骤S4得到的频域信号进行快速傅立叶逆变换(IFFT变化，inverse fast Fourier transform)得到时域形式的激励信号。
本发明提供了一种马达振动波的生成方法包括如下步骤：步骤S1：通过白噪声信号激励马达，并通过加速度传感器测量马达的振动信号；步骤S2：通过加速度传感器获取的振动信号得到系统的脉冲响应；步骤S3：构造期望振动波形；步骤S4：对步骤S3得到的振动波形进行维纳逆滤波得到频域信号；步骤S5：对步骤S4得到的频域信号进行快速傅立叶逆变换得到时域形式的激励信号。本发明提供的马达振动波的生成方法可以自动生成，且方便提取得到期望的振动波形。
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其它相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (8)

  1. 一种马达振动波的生成方法，其特征在于，包括如下步骤：
    步骤S1：通过白噪声信号激励马达，并通过加速度传感器测量马达的振动信号；
    步骤S2：通过加速度传感器获取的振动信号得到系统的脉冲响应；
    步骤S3：构造期望振动波形；
    步骤S4：对步骤S3得到的振动波形进行维纳逆滤波得到频域信号；
    步骤S5：对步骤S4得到的频域信号进行快速傅立叶逆变换得到时域形式的激励信号。
  2. 根据权利要求1所述的马达振动波的生成方法，其特征在于，所述步骤S2为通过维纳霍夫方程，通过求解输入噪声信号的自相关Rxx和输入输出的互相关Rxy来求解系统的脉冲响应h[n]。
  3. 根据权利要求2所述的马达振动波的生成方法，其特征在于，所述系统的脉冲响应为h[n]＝(1/sigma)*Rxy，其中sigma为白噪声的能量。
  4. 根据权利要求1所述的马达振动波的生成方法，其特征在于，所述步骤S3为通过打点或者手工的方式绘制出期望振动波形。
  5. 根据权利要求4所述的马达振动波的生成方法，其特征在于，所述期望振动波形的单位时长为5ms～15ms。
  6. 根据权利要求1所述的马达振动波的生成方法，其特征在于，所述步骤S4为通过求解复原函数，得到退化函数H的输入f(x,y)的估计值。
  7. 根据权利要求6所述的马达振动波的生成方法，其特征在于，所述频域信号的频域表达式为：
    Figure PCTCN2019087697-appb-100001
    其中，*表示信号共轭，P N(u,v)/P S(u,v)为噪声和信号的功率比。
  8. 根据权利要求7所述的马达振动波的生成方法，其特征在于，所述P N(u,v)/P S(u,v)为常数。
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CN109241860A (zh) * 2018-08-13 2019-01-18 瑞声科技(新加坡)有限公司 马达振动波的生成方法
CN110503013B (zh) * 2019-08-07 2022-03-08 瑞声科技(新加坡)有限公司 振感相似度评价方法、装置及存储介质
CN111352509A (zh) * 2020-03-03 2020-06-30 瑞声科技(新加坡)有限公司 一种振动控制方法、存储介质及设备
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