Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Flowchart of the complimentary filter method to calculate knee joint angle [8]. Alignment algorithm rotates the measured angular velocities g to be aligned with the joint axis j (orientation vector of the joint axis in the sensor reference frame). a, acceleration measured by the accelerometer; o, displacement vector of the joint axis in the sensor reference frame; v, acceleration due to gravity; Ψ’, knee angular velocity; Ψ, knee angle.
