FIELD: medical engineering.
SUBSTANCE: method involves measuring instantaneous axial force and moment magnitude, and knee angle value of prosthesis knee. Automatic shock absorption adjustment is carried out on basis of instantaneous data read from transducers and relations binding transducer data and shock absorption in standing phase determined in clinical studies on people having one leg lost and various body dimensions saved in computer memory. Prosthesis foot and ground contact time is continuously measured for each period observed during one walking cycle when carrying out adaptive prosthesis knee shock absorption control. The contact time is saved in computer memory in temporary windows conforming to patient locomotor speed. Iterative shock absorption modulation is carried out in walking phase for straightening knee with patient movement speed. Shock absorption values are used for automatically controlling shock absorption in walking phase at all locomotor speed magnitudes. The prosthesis knee has knee drive, transducers for measuring force and moment applied to the prosthesis knee, controller having memory and capable of sending command signals to the knee drive and receiving input signals from transducers. The knee drive is designed as magnetic rheological brake operating in shift mode. The prosthesis unit has prosthesis knee, recess for receiving stump, prosthesis shin part and prosthesis foot subjected to mechanical binding.
EFFECT: high accuracy and exactness in controlling prosthesis knee in wide range of locomotor parameter values.
34 cl, 10 dwg, 2 tbl
