Technical Report

 

Experiments on the Accuracy of a 3D Motion Capture System: A Project Report submitted to Oregon State University in partial fulfillment of the requirements for the degree of Master of Science Public Deposited

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https://ir.library.oregonstate.edu/concern/technical_reports/xg94hp976

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  • The motion of floating objects are of importance to engineers and scientists in a range of applications. For example, in the design of ships and wave energy convertors and the study of debris mobilized by tsunamis. Measuring the movement of floating objects in the laboratory can be challenging. Six degrees of freedom are required to capture the full range of motion; three translational and three rotational. Onboard systems such as gyroscopes often cannot be included without altering the movement of the object. Motion capture systems provide a relatively non-intrusive method to quantify the movement of a floating object and record the data digitally. They were originally developed as a tool to record the movement of actors for the generation of computer generated imagery. Manufacturers still design the systems for animation applications. However, accuracy information suitable for experimentation and research has not been determined by manufacturers (DeLuzio et al. 1993). The O.H. Hinsdale Wave Research Laboratory at Oregon State University operates a Phase Space Impulse® motion capture system. The system is configured with a measuring field of 6m x 6m in length and width and up to 6m in height, which is suitable for use over portions of the 104m x 3.7m Large Wave Flume or the 48.8m x 26.5m Tsunami Wave Basin. In order to validate motion measurements of objects in the flume or the tsunami basin the accuracy of the Phase Space Impulse® system must be determined. The project goal is to quantify the accuracy and precision of position measurements using the Phase Space Impulse® motion capture system and to determine if these measurements are affected by a protective epoxy encapsulation, calibration, location in the measurement field or rigid body velocity.
  • This research paper was in partial fulfillment of a Masters of Science in the OSU College of Engineering. The major professor was Merrick Haller. The degree was awarded in June 2011. The paper was completed in December 2010.
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