title: Lumbar joint torque estimation based on simplified motion measurement using multiple inertial sensors.
abstract: We estimate lumbar torque based on motion measurement using only three inertial sensors. First, human motion is measured by a 6-axis motion tracking device that combines a 3-axis accelerometer and a 3-axis gyroscope placed on the shank, thigh, and back. Next, the lumbar joint torque during the motion is estimated by kinematic musculoskeletal simulation. The conventional method for estimating joint torque uses full body motion data measured by an optical motion capture system. However, in this research, joint torque is estimated by using only three link angles of the body, thigh, and shank. The utility of our method was verified by experiments. We measured motion of bendung knee and waist simultaneously. As the result, we were able to estimate the lumbar joint torque from measured motion.
authors.forename: Saori
authors.initials: S
authors.lastname: Miyajima
authors.forename: Takayuki
authors.initials: T
authors.lastname: Tanaka
authors.forename: Yumeko
authors.initials: Y
authors.lastname: Imamura
authors.forename: Takashi
authors.initials: T
authors.lastname: Kusaka
mesh_terms: D000054:Acceleration; D001416:Back Pain / Q000517:prevention & control; D001696:Biomechanical Phenomena; D003198:Computer Simulation; D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional; D007719:Knee Joint / Q000502:physiology; D008159:Lumbar Vertebrae / Q000502:physiology*; D018670:Monitoring, Ambulatory / Q000295:instrumentation* / Q000379:methods; D009068:Movement; D018482:Muscle, Skeletal / Q000502:physiology; D010363:Pattern Recognition, Automated; D011187:Posture; D013848:Thigh / Q000502:physiology; D019415:Torque