Estimation of Balance-ability on Healthy Subjects Using Postural Stability Index  
Author Nurul Retno Nurwulan


Co-Author(s) Bernard C. Jiang; Vera Novak


Abstract Quantifying human gait in real-life environment is essential to estimate the balance-ability. This paper proposes the postural stability index (PSI), a novel measure to quantify different balance-ability on healthy subjects. Wearable accelerometers were put on the ankles and knees of the subjects. The resultant of the x-, y-, and z-axes of the acceleration data were collected from 10 young adults and 10 healthy older adults. The subjects were asked to perform normal walking, walking with obstacles, and fall-like motions. The ensemble empirical mode decomposition (EEMD) was used to reconstruct the acceleration data. The analyses of the PSI values showed decreasing trend of the normal walking, walking with obstacles, and fall-like motions. These results suggested that PSI is potentially helpful in estimating the balance-ability of healthy subjects.


Keywords Balance-ability, gait, accelerometer, EEMD
    Article #:  RQD25-39
Proceedings of 25th ISSAT International Conference on Reliability & Quality in Design
August 1-3, 2019 - Las Vegas, NV, U.S.A.