WO2022012707A1 - Verfahren zur erfassung einer winkelposition und erfassungssystem - Google Patents
Verfahren zur erfassung einer winkelposition und erfassungssystem Download PDFInfo
- Publication number
- WO2022012707A1 WO2022012707A1 PCT/DE2021/100458 DE2021100458W WO2022012707A1 WO 2022012707 A1 WO2022012707 A1 WO 2022012707A1 DE 2021100458 W DE2021100458 W DE 2021100458W WO 2022012707 A1 WO2022012707 A1 WO 2022012707A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- angular position
- sensor signal
- sensor
- analysis
- detecting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/244—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
- G01D5/24471—Error correction
- G01D5/2448—Correction of gain, threshold, offset or phase control
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/30—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/244—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
- G01D5/245—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains using a variable number of pulses in a train
- G01D5/2451—Incremental encoders
Definitions
- the invention relates to a method for detecting an angular position according to the preamble of claim 1.
- the invention also relates to a detection system for detecting an angular position.
- a method for detecting an angular position of a rotary component is known, for example, from WO 2018/219388 A1.
- a method for detecting an angular position of a rotary component that can be rotated about an axis of rotation is described therein, in which the angular position of the rotary component is recorded by a sensor system arranged radially at a distance from the axis of rotation.
- a magnetic ring arranged firmly and concentrically on the rotating component causes a magnetic field that changes relative to the sensor system and is detected by the sensor system, with a signal picked up by the sensor system being evaluated with regard to the angular position.
- the signal picked up by the sensors is evaluated with regard to amplitude information of the magnetic field and a correction parameter is determined from the amplitude information, by means of which an angular error of the angular position picked up from the signal of the sensors is determined. The angular error is then used to correct the angular position determined from the signal emitted by the sensors.
- the object of the present invention is to detect an angular position of a rotary component more accurately and quickly.
- the angular position of the rotary component should be able to be determined with as little calculation effort as possible. Furthermore, the angular position should be detected more cost-effectively.
- At least one of these objects is achieved by a method for detecting an angular position of a rotary component that can be rotated about an axis of rotation via a sensor unit that has a fixed sensor element and a rotary element that can be rotated relative to it and together with the rotary component, with the sensor element in each case having a first first sensor signal assigned to the detection position and a second sensor signal assigned to the second detection position, which is perpendicular to the first detection position around the axis of rotation, to an evaluation unit which, in an evaluation step, calculates the angular position as a function of the first and second detection positions using an atan2 function, wherein in one of the Evaluation step upstream processing step, a possible amplitude error and a possible orthogonal error of the first and second sensor signal is converted as a total error via a Flauptkomponenanalysis of the first and second sensor signal in an amplitude difference of the first and second sensor signal.
- the sensor unit and the rotary component can be arranged in a vehicle.
- the rotary component can be assigned to a parking lock device.
- the rotary component can be arranged on an actuator for adjusting the parking lock device or for actuating a clutch of the vehicle.
- the rotating member and the rotating member may be concentrically rotatable.
- the sensor unit can be designed as an angle sensor.
- the sensor unit can be arranged at a radial distance from the rotary component.
- the sensor unit can be arranged at an axial distance from the rotary component.
- the sensor element can be a fall sensor.
- the rotating element can be a magnetic ring.
- the rotating element can be a permanent magnet.
- the rotating element can be diametrically magnetized.
- the first and/or second sensor signal can be a periodic signal, caused in particular by the rotation of the rotary element.
- the first sensor signal can be a cosine signal and the second sensor signal can be a sine signal.
- the first sensor signal and second sensor signal can have a possible amplitude error and a possible orthogonal error.
- the orthogonal error ⁇ describes the deviation between the first and second sensor signals S 1,a , S 2,a which should theoretically run perpendicular to one another due to the vertical position of the first and second detection position.
- the amplitude error describes a deviation in the amplitude of the first and second sensor signals S 1 , S 2 relative to one another.
- the first sensor signal S 1,a and second sensor signal S 2,a output by the sensor unit can first be processed in a preparatory step before being transferred to the evaluation step.
- An offset error superimposed on the first and second sensor signal S 1,a , S 2,a can be compensated for and the first preprocessed sensor signal S 1,p cleaned in this way and the second preprocessed sensor signal S 2,p cleaned in this way can be output.
- the offset error can be determined, for example, by using a max-min method. During at least one rotation of the rotating component, the maximum and minimum sensor value of the respective sensor signal can be recorded and then the offset of the respective sensor signal can be determined. This calculated offset can then be compensated.
- the first and second preprocessed sensor signal S 1,p , S 2,p can be input to a processing step that follows the preparation step. Several individual steps can be included in the processing step.
- the preparation step can have an analysis step, a conversion step and an adjustment step.
- the analysis step and the conversion step can occur before the adjustment step.
- the analysis step can occur before the conversion step.
- the first and second pre-processed sensor signal S 1,p , S 2,p can be processed in the analysis step.
- a Coordinate rotation are assumed, which describes the first and second preprocessed sensor signal S 1, p , S 2, p according to the following context
- a and B are the coefficients of the rotation matrix
- a 1 and b 1 are the amplitudes of the circumscribed sensor signal
- ⁇ 0 is the phase shift. It was found that a possible amplitude error and a possible orthogonal error of the first and second preprocessed sensor signal S 1 ,p , S 2,p can be converted together into an amplitude error of the circumscribed sensor signals.
- the circumscribed sensor signals have the phase shift ⁇ 0 compared to the first and second preprocessed sensor signals S 1 ,p , S 2,p .
- the parameters of the rotation matrix and the amplitudes a 1 and b 1 can be calculated in the analysis step. Principal component analysis can be used for this. This in turn can be done with a singular value decomposition or a main axis transformation. In the following, the main axis transformation is to be used, which in particular requires less computing power.
- the rotation matrix consists of the eigenvectors of the correlation matrix M, which is calculated as follows with n as the number of measuring points.
- the eigenvalues ⁇ 1 and ⁇ 2 and the associated eigenvectors V 1 and V 2 of the correlation matrix M are then determined, with which the rotation matrix is described as follows
- the amplitudes a 1 and b 1 from (2) can then be calculated using the eigenvalues ⁇ 1 and ⁇ 2 , with ⁇ 1 > ⁇ 2 , according to the following relationship
- phase shift «o can be calculated with (2), via
- the first preprocessed sensor signal and the second preprocessed sensor signal can be rotated with the rotation matrix, whereby the first preprocessed sensor signal S 1, p into a first converted sensor signal S 1, r and the second preprocessed sensor signal S 2, p into a second converted sensor signal S 2,r with
- the first converted sensor signal S 1, r and the second converted sensor signal S 2, r can be normalized with the amplitudes a 1 from (4) and b 1 from (5).
- the first converted sensor signal S 1, r can be multiplied by a first analysis parameter 1/a 1 and the first converted sensor signal S 2, r can be multiplied by a second analysis parameter 1/b 1 and thereby normalized.
- the first processed sensor signal S 1, c and the second processed sensor signal S 2, c output in this way can be transferred to the subsequent evaluation step, which calculates the output angular position ⁇ c from the two sensor signals by using the atan2 function.
- the angular position ⁇ c output by the evaluation step is changed via a correction step in that the constant phase shift ⁇ 0 as a third analysis parameter calculated by the analysis step is subtracted from the output angular position ⁇ c and the thereby processed angular position ⁇ is output.
- the processing step has an analysis step that carries out the main component analysis of the first and second sensor signal and thereby determines at least one analysis parameter that is used in at least one subsequent processing step to analyze the first and/or second sensor signal to change.
- the first and second sensor signals can then be changed as a function of the at least one analysis parameter in order to reduce the angular error.
- the principal component analysis applies a principal axis transformation with a rotation matrix.
- the analysis parameter can be calculated with little calculation power.
- the analysis parameter can be directly dependent on at least one eigenvalue of the principal axis transformation.
- the processing step has a conversion step that converts the first and second sensor signal into a respectively converted first and second sensor signal by rotating the coordinates using the rotation matrix.
- the possible amplitude error and the possible orthogonal error in the first and second sensor signals can be changed into a common amplitude error of the first and second converted sensor signals.
- the first and second converted sensor signals can also have a phase shift relative to the first and second sensor signals.
- the first converted sensor signal is provided with a first analysis parameter determined in the analysis step and the second converted sensor signal is normalized with a second analysis parameter determined in the analysis step and is output as a first and second processed sensor signal.
- the common amplitude error of the first and second converted sensor signals can be compensated.
- the first and second analysis parameters are dependent on the eigenvalues of the principal axis transformation.
- the first analysis parameter can only depend on the first eigenvalue that was determined during the main axis transformation.
- the second analysis parameter can only depend on the second eigenvalue, which was determined during the main axis transformation.
- the adaptation step is followed by the evaluation step, which, starting from the first and second processed sensor signal, calculates the angular position as the output angular position by using the atan2 function.
- the atan2 function is an extension of the inverse trigonometric function arctangent and, like it, an inverse function of the trigonometric function tangent. It takes two real numbers as arguments, unlike the normal arctangent, which takes only one real number as an argument. It therefore has enough information to be able to output the function value in a value range of 360° (i.e. all four quadrants) and does not have to be limited to two quadrants (like the normal arctangent).
- the evaluation step is followed by a correction step in which the angular position is corrected by a third analysis parameter determined in the analysis step.
- the first, second and/or third analysis parameter can be stored in a retrievable memory.
- a preferred embodiment of the invention is advantageous in which the third analysis parameter corresponds to a phase shift of the respectively converted sensor signal in relation to the respective pre-processed sensor signal.
- the angular position output can be output as a processed angular position after being corrected by the phase shift. Furthermore, at least one of the objects specified above is achieved by a detection system for detecting an angular position of a rotary component by a method with at least one of the features described above, having an evaluation unit and a sensor unit, which has a fixed sensor element and a rotary element that can be rotated relative to it and together with the rotary component has, solved.
- Figure 1 A flowchart of a method in a special
- FIG. 2 A respective curve graph of the sensor signals according to the individual
- Figure 3 A respective angular error curve of the sensor signals after the individual processing steps of the method according to Figure 1.
- FIG. 1 shows a flowchart of a method 100 in a special embodiment of the invention.
- Method 100 detects an angular position ⁇ of a rotary component rotatable about an axis of rotation via a sensor unit 102, which generates a first sensor signal S 1, a that is dependent on the angular position ⁇ and is assigned to a first detection position, and a first sensor signal S 1, a about the axis of rotation perpendicular to the second sensor signal S 2 , a associated with the second detection position lying in the first detection position, to an evaluation unit 104 .
- the evaluation unit 104 calculates the angular position ⁇ from the first and second sensor signals S 1, a , S 2, a over a number of processing steps.
- FIG. 2 shows a respective curve graph of the sensor signals that are output after the individual processing steps of this method 100 in xy coordinates
- FIG. 3 shows a respective angular error profile of the angular error F of the sensor signals that are output after the corresponding processing steps of this method 100.
- the following explanation refers to the method 100 according to FIG. 1, but expressly refers to FIG. 2 and FIG. 3 in places.
- the angular error F shown in FIG. 3 can occur via the angular position ⁇ .
- the angular error F corresponds to a measurement inaccuracy and, if not taken into account, can cause an inaccurate measured angular position ⁇ .
- the angle error F can be taken into account and compensated for by the further processing steps of the method 100 that follow.
- the first sensor signal S 1, a and the second sensor signal S 2, a is output by the sensor unit 102 to the evaluation unit 104.
- the evaluation unit 104 has a preparation step 106 in which an offset error superimposed on the first and second sensor signal S 1 ,a , S 2,a is compensated for and the first and second preprocessed sensor signal S 1 ,p , S 2,p cleaned in this way are output .
- the offset error can be determined by using a max-min method 108, for example. During at least one rotation of the rotary element, the maximum and minimum sensor value of the respective sensor signal S 1 ,a , S 2,a can be recorded and then the offset of the respective sensor signal S 1 ,a , S 2,a can be determined.
- This calculated offset can then be compensated for in the first and second sensor signals S 1,a , S 2,a .
- the corresponding prepared sensor signal S p in FIG. 2 is an ellipse centered on the zero point.
- FIG. 3 shows the associated course of the angular error F p contained in the first and second preprocessed sensor signal.
- the first and second preprocessed sensor signals S 1 ,p , S 2 ,p are then input to a processing step 110 following the preparation step 106 .
- a processing step 110 several individual processing steps, here an analysis step 112, a conversion step 114 and an adjustment step 116, can be carried out.
- the first and second pre-processed sensor signals S 1 ,p , S 2 ,p are first processed in the analysis step 112 .
- a coordinate rotation according to (2) of the first and second preprocessed sensor signals S 1,p , S 2,p is assumed.
- the coordinate rotation is calculated using a rotation matrix. It was found that a possible amplitude error and a possible orthogonal error of the first and second preprocessed sensor signal S 1 ,p , S 2,p can be converted together into an amplitude error of the sensor signals obtained via the coordinate rotation.
- the rotation matrix is calculated in the analysis step 112 by applying the principal component analysis according to (3). This in turn is carried out with a main axis transformation, with which the eigenvalues and the associated eigenvectors of the correlation matrix, on which the rotation matrix is based, are determined.
- analysis step 112 a first analysis parameter 1/a 1 dependent on the first eigenvalue and a second analysis parameter 1/b 1 dependent on the second eigenvalue are calculated and stored for later access.
- a third analysis parameter is formed by the phase shift ⁇ 0 according to (6).
- the first and second preprocessed sensor signals S 1 ,p , S 2,p are rotated using the rotation matrix according to (2), whereby the first preprocessed sensor signal S 1 ,p is converted into a first converted sensor signal S 1 , r and the second preprocessed sensor signal S 2, p is converted into a second converted sensor signal S 2, r according to (7).
- this first and second converted sensor signal S 1,r , S 2,r the possible existing amplitude error and the orthogonal error in the first and second sensor signal S 1,a , S 2,a has been converted into an amplitude difference as a sum error.
- the converted sensor signal S r results from a rotation of the prepared sensor signal S p , as a result of which the main axes of the ellipse lie on the coordinate axes of the coordinate system defined by the zero point.
- the associated angular error F r in FIG. 3 has been shifted by the coordinate rotation.
- a subsequent adjustment step 116 the first converted sensor signal S 1,r with the first analysis parameter 1/a 1 , where a 1 is calculated according to (4) and the second converted sensor signal S 2,r with the second analysis parameter 1/b 1 , normalized with b 1 from (5).
- the difference in amplitude between the first and second converted sensor signals S 1 ,r , S 2,r is compensated and output as first and second processed sensor signals S 1 ,c , S 2,c .
- the processed sensor signal S c in FIG. 2 is a circle with the center at the zero point.
- the related angular error F c in FIG. 3 runs independently of the angular position ⁇ .
- the first and second conditioned sensor signal S 1 , c , S 2 , c output in this way is then transferred to a subsequent evaluation step 118 which calculates the angular position from the first and second conditioned sensor signal S 1 , c , S 2 , c by using the atan2 function calculated.
- the evaluation step 118 outputs the calculated angular position to a correction step 120 as the output angular position ⁇ c .
- correction step 120 the output angular position ⁇ c is changed by subtracting the phase shift ⁇ 0 as a third analysis parameter calculated by analysis step 112 from the output angular position ⁇ c and outputting the angular position ⁇ processed thereby.
- the calculated angular error F s in FIG. 3 is thereby compensated and the angular position ⁇ of the rotary component can be calculated precisely.
- FIG. 4 shows a course of the calculation accuracy G as a function of the number n of measurement points.
- the required number n of measuring points can be determined.
- the relationship between the number n of measuring points, the calculation accuracy G and the resolution N of the measurement is
- FIG. 5 shows a curve of the maximum angular error F max as a function of the signal quality R in a comparison between a number of methods.
- the maximum angle error F max depends on the signal quality, which is represented by the signal-to-noise ratio.
- the maximum angular error F max when detecting the angular position is highest when using the max-min method Ma, in which the orthogonal error is uncompensated.
- the maximum angular error F max is already reduced in a method Ms according to the prior art.
- the method Mc described in DE 102020 102064.3 is designed to reduce the maximum angle error F max even further, thereby significantly reducing the calculation power compared to the method Ms according to the prior art.
- the proposed method Me is best in a specific embodiment of the invention.
- the maximum angular error F max can be reduced to approximately 50%, for example, in the case of low noise, ie high R, compared to the method Mc.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020227046002A KR20230017290A (ko) | 2020-07-15 | 2021-05-27 | 각도 위치 검출 방법 및 검출 시스템 |
| CN202180046643.8A CN115917262B (zh) | 2020-07-15 | 2021-05-27 | 用于检测角位置的方法和检测系统 |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020118613.4 | 2020-07-15 | ||
| DE102020118613 | 2020-07-15 | ||
| DE102020123180.6 | 2020-09-04 | ||
| DE102020123180 | 2020-09-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2022012707A1 true WO2022012707A1 (de) | 2022-01-20 |
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ID=76421888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE2021/100458 Ceased WO2022012707A1 (de) | 2020-07-15 | 2021-05-27 | Verfahren zur erfassung einer winkelposition und erfassungssystem |
Country Status (4)
| Country | Link |
|---|---|
| KR (1) | KR20230017290A (de) |
| CN (1) | CN115917262B (de) |
| DE (1) | DE102021113662A1 (de) |
| WO (1) | WO2022012707A1 (de) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4313627C1 (de) * | 1993-04-27 | 1994-05-05 | Ant Nachrichtentech | Verfahren zum Ermitteln der Eigenwerte einer Matrix aus Signalabtastwerten |
| DE102017202217A1 (de) * | 2017-02-13 | 2018-08-16 | Carl Zeiss Industrielle Messtechnik Gmbh | Verfahren und Vorrichtung zur Korrektur eines Ausgangssignals einer Messeinrichtung |
| DE102017202218A1 (de) * | 2017-02-13 | 2018-08-16 | Carl Zeiss Industrielle Messtechnik Gmbh | Verfahren und Vorrichtung zur Korrektur eines Ausgangssignals einer Messeinrichtung |
| WO2018219388A1 (de) | 2017-05-31 | 2018-12-06 | Schaeffler Technologies AG & Co. KG | Verfahren zur bestimmung einer winkelposition eines sich drehenden bauteiles, insbesondere eines elektromotors für ein kupplungsbetätigungssystem eines fahrzeuges |
| DE102017128891A1 (de) * | 2017-12-05 | 2019-06-06 | Schaeffler Technologies AG & Co. KG | Verfahren zur Ermittlung von Winkelinformationen eines Positionssensors für einen Kupplungsaktor |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6293022B1 (en) * | 1997-04-25 | 2001-09-25 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Mounting structure for wheel angle detector and rotation amount detector for vehicle wheel |
| CN100414255C (zh) * | 2004-12-16 | 2008-08-27 | 阿尔卑斯电气株式会社 | 角度检测传感器的补偿值计算方法以及使用其的角度检测传感器 |
| CN100458832C (zh) * | 2007-06-21 | 2009-02-04 | 中国科学院合肥物质科学研究院 | 基于方向特征的掌纹识别方法 |
| CN101214851B (zh) * | 2008-01-10 | 2010-12-01 | 黄席樾 | 船舶行驶智能型全天候主动安全预警系统及其预警方法 |
| DE102012202404B4 (de) * | 2012-02-16 | 2018-04-05 | Infineon Technologies Ag | Drehwinkelsensor zur absoluten Drehwinkelbestimmung auch bei mehrfachen Umdrehungen |
| DE102020102064B3 (de) | 2020-01-29 | 2021-05-27 | Schaeffler Technologies AG & Co. KG | Kupplungsaktor, Erfassungssystem und Verfahren zur Erfassung einer Winkelposition eines Drehbauteils |
-
2021
- 2021-05-27 CN CN202180046643.8A patent/CN115917262B/zh active Active
- 2021-05-27 WO PCT/DE2021/100458 patent/WO2022012707A1/de not_active Ceased
- 2021-05-27 DE DE102021113662.8A patent/DE102021113662A1/de active Pending
- 2021-05-27 KR KR1020227046002A patent/KR20230017290A/ko active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4313627C1 (de) * | 1993-04-27 | 1994-05-05 | Ant Nachrichtentech | Verfahren zum Ermitteln der Eigenwerte einer Matrix aus Signalabtastwerten |
| DE102017202217A1 (de) * | 2017-02-13 | 2018-08-16 | Carl Zeiss Industrielle Messtechnik Gmbh | Verfahren und Vorrichtung zur Korrektur eines Ausgangssignals einer Messeinrichtung |
| DE102017202218A1 (de) * | 2017-02-13 | 2018-08-16 | Carl Zeiss Industrielle Messtechnik Gmbh | Verfahren und Vorrichtung zur Korrektur eines Ausgangssignals einer Messeinrichtung |
| WO2018219388A1 (de) | 2017-05-31 | 2018-12-06 | Schaeffler Technologies AG & Co. KG | Verfahren zur bestimmung einer winkelposition eines sich drehenden bauteiles, insbesondere eines elektromotors für ein kupplungsbetätigungssystem eines fahrzeuges |
| DE102017128891A1 (de) * | 2017-12-05 | 2019-06-06 | Schaeffler Technologies AG & Co. KG | Verfahren zur Ermittlung von Winkelinformationen eines Positionssensors für einen Kupplungsaktor |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102021113662A1 (de) | 2022-01-20 |
| CN115917262A (zh) | 2023-04-04 |
| CN115917262B (zh) | 2025-09-05 |
| KR20230017290A (ko) | 2023-02-03 |
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