CD Skripsi
Rancang Bangun Mekanisme Blade Dozer Skala Laboratorium Menggunakan Aktuator Pneumatik Dengan Sistem Kontrol Menggunakan Bluetooth Dan Internet Of Things (Iot)
ABSTRACT
The heavy equipment industry in Indonesia continues to grow, with the dozer remaining a key machine in construction and mining. Testing full-scale units, however, is constrained by high costs, safety risks, and measurement complexity in a laboratory setting. This research aims to design, build, and test a 1:10 laboratory-scale dozer blade mechanism driven by pneumatic actuators with wireless control based on Bluetooth and IoT. The mechanism was designed in SolidWorks 2025 and fabricated via 3D printing using PETG. The actuation system uses four double-acting pneumatic cylinders controlled by two 5/3 double-solenoid valves at 6 bar, governed by an ESP32 microcontroller integrated with Bluetooth and IoT via HiveMQ. Analysis included soil resistance force calculations for two blade designs (SU Blade and A Blade) using the universal earthmoving equation (McKyes, 1985) for sandy loam soil, velocity analysis of the lifting blade mechanism, and stress and safety factor analysis of the dozer arm under combined axial and bending loads. Results show the prototype performed stable lifting and pitching movements through both control methods, with average response times of 0.33–0.35 s for Bluetooth and 0.39–0.47 s for IoT, faster than a previous excavator prototype study. Blade velocity during lifting was 2.8 mm/s at an actuator input speed of 11.5 mm/s, while stress analysis yielded a maximum normal stress of 5.75 MPa with a safety factor of 4.92, indicating an adequate safety margin. This research is expected to support learning in pneumatic systems, mechatronics, and wireless control at the Department of Mechanical Engineering, Riau University..
Keywords : dozer, blade, pneumatic, ESP32, Bluetooth, IoT.
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