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Attitude Estimation using accelerometers with constrained external acceleration
Tri-Nhut Do,Sang Kyeong Park,Young Soo Suh 제어로봇시스템학회 2010 제어로봇시스템학회 국제학술대회 논문집 Vol.2010 No.10
An attitude algorithm from output vector of accelerometer was proposed with the assumption that the direction of external acceleration is precisely localized or relatively localized on a certain plane. Simulation and experimental results verify that the estimation performance of the proposed method is better than that of the conventional method.
도치웃,서영수,Nhut, Do-Tri,Suh, Young-Soo 제어로봇시스템학회 2011 제어·로봇·시스템학회 논문지 Vol.17 No.7
A low cost gait analysis system, which can measure stride length, walking speed, and ground reaction force, is proposed. A gait analysis system is used for medical evaluation of patients and rehabilitation assistance. Low cost cameras are attached to a shoe and movement of a shoe is estimated using infrared LED landmarks. Ground reaction force is measured from pressure sensors, which are installed inside a shoe. Through experiments, it is shown that the proposed system can be used to obtain stride length, walking speed, and ground reaction force.
The pedestrain navigation system using vision and inertial sensors
Sang-Kyeong Park,Young Soo Suh,Tri Nhut Do 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
Is this paper, a pedestrian inertial navigation system with vision is proposed. The navigation system using inertial sensors has problems that it is difficult to determine the initial position and the position error increases over time. To solve these problems, a vision system in addition to an inertial navigation system is used, where a camera is attached to a pedestrian. Landmarks are installed to known positions so that the position and orientation of a camera can be computed once a camera views the landmark. Using this position information, estimation errors in the inertial navigation system is compensated.