RESEARCH OF DYNAMIC AND POWER CHARACTERISTICS OF MECHATRONIC UNIT OF THE ARTIFICIAL HEART

Aim: Important problem in creation of implanted systems of artificial heart based on the mechatronic units is definition of their dynamic and power characteristics. Methods: The mathematical model of dynamics of the mechatronic unit of artificial heart which considers pulsing nature of movement of a membrane, elasticity of the chamber of the artificial ventricle of heart, parameters of the DC motor and the roller-screw executive mechanism is developed for the solution of this problem. Dynamics of the mechatronic unit of artificial heart is investigated on the basis of double-mass mathematical model. The first weight (entrance link of the executive mechanism) is rigidly connected with rotor of DC motor, and the second weight (an output link) progressively moves loading. For the solution of the differential equations the MATLAB complex was used. Results: Dependences of change of the main dynamic and power characteristics of the mechatronic unit of the artificial heart, movements of the membrane of an artificial ventricle of heart considering pulsing character, elasticity of the camera of the artificial ventricle of heart, parameters of the DC motor and the roller-screw executive mechanism are received. Conclusions: The researches of the developed mathematical model of dynamics of the mechatronic unit of artificial heart showed that for compliance technical requirements the mechatronic unit of artificial heart has to possess with a working power of 28 ... 30 W at the power of thermal losses no more.