Kebutuhan pakan ternak berkualitas di beberapa wilayah Indonesia terus meningkat seiring berkembangnya usaha peternakan dan menuntut efisiensi dalam proses pencacahan rumputPenggunaan mesin pencacah konvensional sering mengalami kendala teknis berupa penurunan kecepatan (RPM) secara drastis saat mesin diberi beban, sehingga kualitas cacahan tidak seragam. Penelitian ini merancang, membangun, dan menguji mesin pencacah rumput dengan pengaturan kecepatan motor induksi AC tiga fasa 1 HP menggunakan Variable Frequency Drive (VFD) dan umpan balik sensor encoder. Sistem ini dikendalikan oleh algoritma Proportional-Integral-Derivative (PID). Pengujian dilakukan untuk mencari parameter kontrol paling optimal serta menganalisis performa sistem. Hasil tuning PID terbaik yang diperoleh adalah Kp 1,5, Ki 1,4, dan Kd 0,5. Berdasarkan pengujian awal tanpa beban nyata pada variasi setpoint 450, 550, 650, dan 750 RPM, algoritma PID mampu meredam lonjakan putaran awal dan menjaga kestabilan sistem dengan rata-rata error (MAE) berturut-turut sebesar 3,45 RPM, 4,59 RPM, 6,56 RPM, dan 6,97 RPM. Adapun pengujian kapasitas pencacahan maksimal dan tingkat keseragaman ukuran hasil cacahan pada kondisi pembebanan rumput nyata belum dilakukan secara kuantitatif dalam penelitian ini, sehingga direkomendasikan sebagai fokus pada pengembangan lanjutan.


Deskripsi Lain

The demand for high-quality animal feed in several regions of Indonesia continues to increase in line with the development of livestock farming, creating a need for greater efficiency in the grass chopping process. Conventional grass-chopping machines often encounter technical problems, particularly a drastic decrease in rotational speed (RPM) when the machine is subjected to load, resulting in inconsistent chopping quality. This study aims to design, construct, and test a grass-chopping machine equipped with speed control for a 1 HP three-phase AC induction motor using a Variable Frequency Drive (VFD) and encoder sensor feedback. The system is controlled using a Proportional-Integral-Derivative (PID) algorithm. Testing was conducted to determine the optimal control parameters and analyze system performance. The best PID tuning parameters obtained were Kp 1.5, Ki 1.4, and Kd 0.5. Based on preliminary no-load testing at setpoint variations of 450, 550, 650, and 750 RPM, the PID algorithm was able to suppress initial rotational speed overshoot and maintain system stability, with Mean Absolute Error (MAE) values of 3.45 RPM, 4.59 RPM, 6.56 RPM, and 6.97 RPM, respectively. However, quantitative testing of the maximum chopping capacity and the uniformity of the chopped grass size under actual grass-loading conditions was not conducted in this study. Therefore, these aspects are recommended the focus of further development.

• Rancang Bangun Mesin Chopper Rumput Otomatis Berbasis Metode Pid