Browse > Article

Measuring Angular Speed and Angular Acceleration for Automotive Windshield Wiper Pivot  

Lee Byoungsoo (Department of Mechanical and Automotive Engineering, Keimyung University)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.13, no.4, 2005 , pp. 58-65 More about this Journal
Abstract
A method measuring angular speed and estimating angular acceleration of an automotive wind shield wiper pivot with limited resources has been proposed. Limited resources refer to the fact that processes cannot be operated in real-time with a regular notebook running a Microsoft Windows. Also, they refer to the fact that data acquisition cards have only two general purpose counters as many generic cards do. An optical incremental encoder has been employed for measuring angular motion. To measure the angular speed of the pivot, periods for the encoder's output pulses have been measured as the speed is related to the reciprocal of the period. Since only information acquired from one counter channel is the magnitude of the angular speed, sign correction is necessary. Also the information for the exact time when a pivot passes left and right dead points is also missing and the situation is inherent to the hardware setup. To find out the zero-crossing time of the angular speed, a linear interpolation technique has been employed. Lastly, to overcome the imperfection of the mechanical encoders, the angular speed has been curve fitted to a spline. Angular acceleration can be obtained by a differentiation of the angular speed.
Keywords
Angular speed; Angular acceleration; Automotive windshield wiper; Polynomial interpolation; Minimum-least-squared; Measurement and estimation;
Citations & Related Records
연도 인용수 순위
  • Reference
1 A. Stotsky and A. Forgo, 'Recursive Spline Interpolation Method for Real Time Engine Control Application,' Control Engineering Practice, Vol.12, Issue 4, PP.409-416, April 2004   DOI   ScienceOn
2 J. B. Kim and J. K. Min, 'A Study on the Estimation Method of the Wheel Acceleration,' Transactions of the KSAE, Vol.5, No.2, pp.120-126, 1997
3 R. Marat-Mendes, C. J. Dias and J. N. MaratMendes, 'Measurement of the Angular Acceleration using a PVDF and a Piezocomposite,' Sensors and Actuators, Vol.76, pp.310-313, 1999   DOI   ScienceOn
4 Period Measurement with a Counter, National Instruments Development Zone Tutorial, http://zone.ni.com, 2004
5 H.-J. von Martens, 'Generalization and Analysis of the Fringe-counting Method for Interferometric Measurement of Motion Quantities,' Measurement, Vol.25, pp.71-87, 1999   DOI   ScienceOn
6 Y. Oshman and L. Markley, 'Sequential Gyroless Attitude and Attitude-Rate Estimation From Vector Observations,' Acta Astronautics, Vol.46, No.7, pp.449-463, 2000   DOI   ScienceOn
7 Using Quadrature Encoders with E Series DAQ Boards, National Instrument Application Note 084, May 1996
8 B. C. Schwartz and D. L. Jones, 'Quadratic and Instantaneous Frequency Analysis of Helicopter Gearbox Faults,' Mechanical System and Signal Processing, Vol.14, No.4, pp.579-595, 2000   DOI   ScienceOn
9 A. Taeubnet and H.-J. von Martens, 'Measurement of Angular Accelerations, Angular velocities and Rotation Angles by Grating Interferometry,' Measurement, Vol.24, pp.21-32, 1998   DOI   ScienceOn
10 DAQ NI 6034E/6035E/6036E User Manual Multifunction I/O Devices, National Instruments, July 2002 Edition, Part Number 322339C-01, 2002
11 J. Mizuno, K. Nottmeyer, M. Amemori, Y. Kanai and T. Kobayashi, 'The Study of Silicon Bulk Micromachined Angular Acceleration Sensor,' JSAE Review, Vol.21, pp.79-84, 2000   DOI   ScienceOn
12 Making Accurate Frequency Measurements, National Instruments Development Zone Tutorial, http://zone.ni.com, 2004
13 A. Taeubnet and H.-J. von Martens, 'Diffraction Grating Interferometer for the Accurate Measurement of Rotational Quantities,' Measurement, Vol.16, pp.71-80, 1995   DOI   ScienceOn
14 LabVIEW Measurement Manual, National Instruments, July 2000 Edition, Part Number 322661A-01, 2000