Joint Passive Resistance Database ) a3) Fujita,1998


Fujita, K. and Sato, H.


Intrinsic viscoelasticity of ankle joint during standing


Proc. Intern. Conf. of the IEEE eng. Med. Biol. Soc.

Vol. & No.

Vol.20, No.5






Fujita-98-1 [Target]
Joint: Ankle
Direction: Flexion-Extension (Dorsiflexion-Plantar Flexion)
Characteristic(s): Viscoelasticity

[Measurement Condition]
Subjects: 10 persons
Age Span: -
Country: Japan
Method: Estimation by dynamic equilibration (type 2-2)

Refer to the figure on the right side.
The standard posture of the ankle angle is defined as that the plantar surface makes a right angle with a line through the fibular head and the medial malleolus.

[Expression of the data]
Graph of a viscoelastic coefficients about 3 postures
Function not shown

  • These joint viscoelastic characteristics are identified using an estimation method of an inpedance in robot engineering.
  • 3 Postures are sitting, standing and single-leg standing. Even each significant difference is verified.
  • The viscoelasticity is measured during eys-open/closed sitting and standing.
  • The raw data of the joint angle and the joint moment about only 1 person exist.
  • The information of the properties of the subjects does not exist.