Akademik Veri Yönetim Sistemi
Gazi Mühendislik Bilimleri Dergisi, cilt.11, sa.1, ss.1-15, 2025 (Hakemli Dergi)
In industry, the trace path of a point on the coupler link of four-bar mechanism is often utilized and sometimes it is desired that the couplar point moves on its path with constant velocity. This can be achieved by a variable crank speed. Processes requiring constant speed are often achieved by designing expensive complex mechanisms with high degrees of freedom without feedback control. This study considers the four-bar mechanism driven by a DC motor with constant coupler point velocity. MATLAB® is used to model and to simulate the system dynamics. We have successfully implemented an experimental application of coupler point speed control, a mechanism that is much needed in the industry, at a remarkably low cost. We developed a highly detailed simulation model that incorporates intricate system dynamics including bearing frictions. Additionally, motor parameters are predicted for the application through cost-effective estimation techniques. In order to show the efficiency of the method, some experimental studies are made besides the numerical simulations and the results are compared. Proportional plus integral plus derivative (PID) control action is used to control of the crank speed and it is shown that the desired coupler point velocity is achieved.