Intelligent wheelchairs are motorized resting media designed to help users with physical limitations, where an artificial control system is added or used to replace user controls. The aim is to reduce or eliminate the user's duty to drive a motorized wheelchair. At the station there are still many places that are still not accessible by persons with disabilities. As the difference between platform and train height, usually there are stairs that support to enter the train. Therefore the writer makes an innovation so that it can make it easier for people with disabilities to move up stairs in a wheelchair. The design of the wheelchair design uses a crawler type with the help of universal plates from Tamiya, the gearbox uses Twin Motor with a rotation ratio of 204: 1. Servo motor mounted on the seat which is supported by a gyro sensor as a counterweight to the chair when the position of the chair up or down. In the DC motor and servo PID method is added so that the motion changes can be smooth. PID is installed when testing the equilibrium results obtained a little stable oscillation at Kp = 0.27, Ki = 0.0004, and Kd = 0.0001, while when testing the speed obtained the most stable conditions at Kp = 2, Ki = 1, Kd = 0.25.
Kereta Api merupakan salah satu moda transportasi penumpang atau barang yang cukup diminati karena mempunyai karakteristik pengangkutan secara massal dan keunggulan dibanding moda transportasi lain. Kecelakaan kereta api seringkali terjadi di indonesia khususnya di perlintasan sebidang dikarenakan faktor seperti sarana perkeretaapian, prasarana perkeretaapian, SDM operator, eksternal dan faktor alam. Oleh karena itu maka perlu adanya pembentukan budaya keselamatan baik di dalam penyelenggaraan perkeretaapian dan pada masyarakat sebagai tindakan preventif salah satunya dengan melakukan sosialisasi simbol dan semboyan perkeretaapian di perlintasan sebidang agar pemahaman masyarakat terhadap hal tersebut dapat meningkat sehingga diharapkan dapat menimbulkan budaya keselamatan pada masyarakat dalam hal perkeretaapian. Kegiatan dilakukan di SD Muhammadiyah Barat Magetan. Sosialisasi diberikan dengan memberikan paparan materi tentang perlintasan sebidang, simbol –simbol dan semboyan perkeretaapian,dilakukan tanya jawab dan tes pemahaman secara acak. Dari hasil diskusi dan tes pemahaman tersebut, masyarakat khususnya siswa SD lebih tahu serta memahami semboyan dan simbol perkeretaapian di perlintasan sebidang.
Peralatan pengaman pintu perlintasan sebidang merupakan peralatan fasilitas operasi perkeretaapian yang membutuhkan sumber energi listrik. Penggunaan bahan bakar fosil sebagai bahan bakar pembangkit listrik jumlahnya semakin menipis, menurut perkiraan jumlah cadangan bahan bakar fosil akan habis sekitar 83 tahun. Untuk menghemat cadangan bahan bakar fosil diperlukan sumber energi cadangan dari sumber energy yang terbarukan seperti energi angin. Energi angin di sekitar jalur perkeretaapian mempunyai potensi sangat besar untuk dijadikan energi listrik. Pembangit listrik mikro wind dalam penelitian ini menggunakan turbin angin dengan sudu-sudu vertikal dan pengarah angin berupa sirip. Berdasarkan hasil penelitiaan serta melakukan pengujian dapat disimpulkan bahwa turbin angin vertikal yang di implementasikan untuk pencatu peralatan pengaman pintu perlintasan dapat mengisi baterai dengan arus pengisian rata-rata 3,28 A pada kecepatan angina rata-rata 3,90 m/s dan putaran 278 rpm dan menghasilkan daya 39,45 watt dan energy total 394,5 watt sehingga dapat mengisi baterai 75Ah/12 volt selama 22 jam
Voltage fluctuation is one of important parameter for power quality in electrification parameter. The voltage parameter is said to be good if the voltage level does not exceed or less than the standard voltage. In the operation of electric trains, several conditions can cause over and under voltage. Like when a train accelerates or decelerates it will affect the system voltage. This research study about voltage fluctuation on AC railway electrification. The method used in this study is to simulate a model of railway electrification such as traction substations, overhead electrification and rail infrastructure. System modeling is done using open power net software. The results of this simulation show the condition of voltage fluctuations on the bus, overhead wire and pantograph sides
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