Global Kalman filter approaches to estimate absolute angles of lower limb segments - Nogueira, Samuel Lourenço; Lambrecht, Stefan; Inoue, Roberto Santos; Bortole, Magdo; Montagnoli, Arlindo N.; Moreno, Juan Carlos; Rocon, Eduardo; Terra, Marco Henrique; Siqueira, Adriano Almeida Gonçalves; Pons, José L (BioMedical Engineering OnLine, 2017)