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Muhammad Raheel Afzal,Carlos Ernesto Palo Pena,Jungwon Yoon 제어로봇시스템학회 2017 제어로봇시스템학회 국제학술대회 논문집 Vol.2017 No.10
Reaction Wheels (RW) have traditionally been used in spacecraft to control their attitude. This paper presents a novel application of RW to deliver kinesthetic cues for balance training through the development of a wearable device that can deliver kinesthetic cues alike light touch. A prototype wearable device has been designed that has 4 RWs as main actuators to generate kinesthetic cues, and additionally the system includes a wireless interface to a computer for evaluation purposes. Two modes of controlling the device output were implemented, PID and Saturated PID (S.PID). For experimental verification, seven young healthy participants performed several balance tasks. The results thus obtained indicate significant (P<0.05) difference in participant’s Mediolateral (ML) trunk sway between experiments conducted without and with kinesthetic cues, and differences in ML trunk sway between PID and S.PID control modes. Thus the relatively small torques delivered by RWs of the proposed device can provide kinesthetic cues for balance assistance.