GYROSCOPE-FREE METHOD FOR MEASURING THE PARAMETERS OF MOVING OBJECTS

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  • TITLE: GYROSCOPE-FREE METHOD FOR MEASURING THE PARAMETERS OF MOVING OBJECTS
  • AUTHOR(S): D. Dichev
  • ABSTRACT: This paper presents a novel gyroscope-free method for measuring dynamic values that define oscillations in moving objects as related to the local vertical. The method is based on appropriate algorithm which utilizes signals from linear MEMS accelerometers interconnected in a differential way. High dynamic accuracy is obtained through real time processing of measuring signals by means of algorithm that has been developed as optimization criterion for the minimum of a mean quadratic error. Said algorithm is composed according to Kalman’s method and is intended to eliminate the impact of certain sources of interference each of which, individually, is of secondary importance though their cumulative action may cause a considerable distortion of the measuring signal. The method proposed eliminates the defects of conventional measuring devices used in this particular area, being based on one hand on substantially simplified mechanical module, and on the achievements in nanotechnologies, microprocessor and computer engineering on the other. In compliance with the fundamental principles of this method there has been developed a special-purpose measuring system designed to measure board and keel rolling, heeling and trim of a ship. Results from experimental investigations, carried out with specially designed test-stand equipment in shape of a hexapode and operating with six degrees of freedom, prove the efficiency of proposed measuring approach.
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