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Chen, X. B.

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THPL006 Mechanical Vibration Measurement System at the Canadian Light Source 133
 
  • J. Li, X. B. Chen, E. Matias, W. Zhang
    CLS, Saskatoon, Saskatchewan
  
  In recent decades, synchrotron radiation has developed into an invaluable scientific tool around the world. At synchrotron radiation facilities, the mechanical vibrations in the optics hutch and experimental hutch, especially in the vertical direction, enlarges the beam size and changes intensity of the monochromatic X-ray beam. To investigate mechanical vibrations at the CLS, a vibration measurement system was developed. The system includes a Vector Signal Analyzer (VSA) and accelerometers. The sensitivity of the accelerometer is 1.02 v/(m/s2). The frequency range of the accelerometer is 0.1 Hz to 300 Hz. The frequency resolution of the accelerometer is better than 0.1 Hz. The vibrations at four beamlines and endstations at the CLS, i.e. the Canadian Macromolecular Crystallography Facility (CMCF) 08ID-1 beamline, the Hard X-ray MicroAnalysis (HXMA) 06ID-1 beamline, the Resonant Elastic and Inelastic Soft X-ray Scattering (REIXS) 10ID-2 beamline, and the Scanning Transmission X-ray Microscope (STXM) endstation at the Spectromicroscopy (SM) 10ID-1 beamline, are investigated.

Terzano, R., Denecke, M. A. & Medici, L. (2010). Synchrotron radiation in soil and geosciences. Journal of Synchrotron Radiation, 17, 147-148.

 
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THPL004 A Discrete Hysteresis Model for Piezoelectric Actuator and its Parameter Identification 127
 
  • Y. Cao, X. B. Chen
    University of Saskatchewan, Saskatoon
  
  Hysteresis is an important nonlinear effect exhibited by piezoelectric actuators (PEA) and its modelling has been drawing considerable attention. This paper presents the development of a novel discrete model based on the concept of auto-regressive moving average (ARMA) for the piezoelectric-actuator hysteresis, and its parameter identification method as well. Experiments were carried out to verify the effectiveness of the developed model. The result obtained shows that the developed model can well represent the hysteresis of the PEA.  
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