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SISTEM PENGAMAN POWER SHAPE-CHARGE PADA FLIGHT TERMINATION SYSTEM (POWER SHAPE CHARGE SECURITY SYSTEM ON FLIGHT TERMINATION SYSTEM) effendi Dodi Arisandi
Jurnal Teknologi Dirgantara Vol. 15 No. 1 Juni 2017
Publisher : National Institute of Aeronautics and Space - LAPAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.jtd.2017.v15.a2484

Abstract

Battery is reusable electric energy resource. Thus, the battery can be used as power for various kind of electronics equipment. The Fligt Termination System (FTS) module also uses battery as  electric energy resource. The FTS module which has been integrated in the rocket system must be controlled strictly in order to avoid accident that can be caused by switching on the battery power. (Smart system yang menjadi focus pada penelitian ini terdiri dari komponen mikrokontroller, inverter, relay, resistor, dan thyristor-belum ada terjemahan untuk ini). This research was focused on how to protect battery resource as power shape-charge in the FTS module. The research showed that  smart system usage could obstruct the activation of the relay when the battery power is switched on.  AbstrakBaterai adalah sumber energi listrik yang dapat digunakan secara berulang-ulang.  Dengan demikian, baterai dapat digunakan sebagai sumber energi listrik untuk berbagai macam peralatan elektronika. Modul Flight Termination System (FTS ) juga menggunakan baterai sebagai sumber energi listrik. Modul FTS yang telah terintegrasi dalam sistem roket harus dikontrol secara ketat agar tidak terjadi kecelakaan yang dapat ditimbulkan oleh penyalaan power modul. Hal ini disebabkan, pada saat power modul FTS dinyalakan maka akan menimbulkan logika high pada mikrokontroller yang dapat memicu aktifnya komponen elektronika. Penelitian ini fokus pada sistem proteksi sumber daya baterai sebagai pemicu sistem shape-charge pada modul FTS. Smart system yang menjadi fokus pada penelitian ini terdiri dari komponen mikrokontroller, inverter, relay, resistor, dan thyristor. Dari hasil penelitian diperoleh bahwa penggunaan smart system dapat menghambat aktifnya relay yang diakibatkan oleh penyalaan power modul FTS.
INCREASING DATA TELEMETRI SOUNDING ROCKET LAPAN WITH PULSE CODE MODULATION METHODE effendi dodi arisandi
Jurnal Teknologi Dirgantara Vol. 18 No.1 Juni 2020
Publisher : National Institute of Aeronautics and Space - LAPAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.jtd.2020.v18.a3353

Abstract

The telemetry data of the sounding rocket when flight in the space is very important to known. This data will be used for next mission or evaluation the last rocket flight. Commonly the data of the sensor in the sounding rocket are accelerometer, gyroscope, magnetometer, GPS and so on. As much data as possible than can be sent to the ground control system when the rocket flies. The problem is when the baud rate is low so not much data can be transmitted. Another problem is when the using serial bit standard communication such as the baud rate is 115.200 which mean that the maximum data in one second is 14,400 characters. It is less than when using the PCM bit rate. Application of PCM in the telemetry for sounding rocket LAPAN is new and need development to reach the optimal. With the PCM method the communication data can transmit around 1.25Mbps or 156,250 characters based on the TR FM02-S-2 full S-band transmitter. In this research, focus to the implementation the PCM method on the FPGA for sending and receiving the data via cable. Two FPGA boards can work together for sending and receiving data with PCM method with the total bit is 1.25Mbps.