CONTENTS NOMENCLATURE AND ABBREVIATIONS……………………………….…………... 3.10. Block diagram showing the applied steps of the multibody virtual model created in the ADAMS software………………………..………………………… 4. RESULTS AND DISCUSSION………………………………………………...... 4.1. The virtual multibody model M1………………………………………………… 4.1.1. Simulation of the multibody model M1 in different range of rotation………………………………………………………………………………. 4.1.1.1 Simulation of the multibody model M1 at the position of 25°…………………………………………………………………………………… 4.1.1.2 Simulation of the multibody model M1 at the position of 50°………………….. 4.1.1.3 Simulation of the multibody model M1 at the position of 100°……………….. 4.1.2. Experimental measurement result for test machine of the hungarian university of agriculture engineering and Life Science…………………………. 4.1.3. Comparing the results of the current study of the numerical measurement method and the experimental measurement result for the Hungarian University of Agriculture Engineering and Life Science test machine………….. 4.2. The virtual multibody model M2…………………………………………………... 4.3. Developing the kinematic motion of multibody model for the knee prosthesis geometry…………………………………………………………………………… 4.4. Developing the new prosthesis geometry………………………………………...... 4.4.1. Boundary conditions for the simulation ……………..…………………………. 4.4.2. Simulation of the multibody model in different positions……………………. 4.4.2.1 Simulation of the multibody model at the position of 25°……………………… 4.4.2.2 Simulation of the multibody model at the position of 50°………………………. 4.4.2.3 Simulation of the multibody model at the position of 100°…………………….. 4.4.3. Comparing the current study results of the new multibody numerical measurement with a previous results from my previous multibody model……...