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All Journal TEKNIK Proceedings of KNASTIK Jurnal Pendidikan Matematika (Jupitek) Wiyata Dharma: Jurnal Penelitian dan Evaluasi Pendidikan Jurnal Magister Pendidikan Matematika (JUMADIKA) AMM Jurnal Lebesgue : Jurnal Ilmiah Pendidikan Matematika, Matematika dan Statistika Edumatika Setawar Abdimas Indonesian Journal of Aerospace
Wahyu Widada
Edwar Technology Co
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Computer Science & IT Decision Sciences, Operations Research & Management Education Engineering Mathematics

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Journal : Indonesian Journal of Aerospace

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PENGEMBANGAN DETEKTOR SIGNAL RADIO MULTI CHANNEL UNTUK RADIO TRACKING ROKET MENGGUNAKAN LOGARITMIK AMPLIFIER Zain, Satria G.; Susanto, Adi; Widodo, Thomas Sri; Widada, Wahyu; Kliwati, Sri
Indonesian Journal of Aerospace Vol. 6 No. 2 (2008): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

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Abstract

Pengukuran kuat signal radio telemetri roket sangat penting dilakukan untuk mengetahui hubungan kualitas signal dan data yang diterima. Power meter ini juga dapat diaplikasikan untuk deteksi perubahan sudut elevasi dan azimuth trayektori roket dengan menggunakan array antena yagi yang telah dikembangkan metodenya. Power meter radio mempunyai rentang pengukuran yang sempit, sehingga terjadi saturasi untuk pengukuran radio dengan power yang cukup besar. Tulisan ini membahas desain dan pengembangan power detektor untuk mendeteksi signal radio pada sistem telemetri roket dengan maksimum pengukutan 1 watt dan dapat diubah sesuai dengan kebutuhan. Signal power meter ini berbasis logarithmic amplifier dengan lebar band sampai dengan 100 db dengan ketelitian 0.02 dB.
METODE PENGGABUNGAN BEBERAPA PENERIMA GPS UNTUK MENINGKATKAN AKURASI DAN KEANDALAN SISTEM PENJEJAK ROKET BALISTIK (METHOD OF COMBINING MULTI-GPS RECEIVERS TO IMPROVE ACCURACY AND RELIABILITY OF THE TRACKING SYSTEM OF SOUNDING ROCKET) Widada, Wahyu
Indonesian Journal of Aerospace Vol. 12 No. 1 Juni (2014): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

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Abstract

Kualitas GPS teknologi tingkat konsumen tidak cukup akurat untuk sistem penjejakan roket balistik. Untuk mengatasi masalah tersebut, tulisan ini membahas metode kombinasi multi receiver Global Positioning System (GPS) untuk meningkatkan akurasi dan keandalan pada sistem tracking roket balistik. Data dari masing-masing receiver GPS akan dipilih yang valid dan digabung dengan mikrokontroller. Data yang telah dikumpulkan dihitung nilai rata-ratanya kemudian dikirim menggunakan radio telemetri ke stasiun peluncuran. Hasil percobaan dengan prototipe menunjukkan terjadi penurunan Root Mean Square Error (RMSE) untuk latitude sekitar 30% dan longitude sekitar 30%, sedangkan untuk altitude sekitar 40%. Penempatan antena GPS pada posisi empat arah yang berbeda meningkatkan reliabilitas dan performa receiver.
METODE TRACKING KECEPATAN ROKET MENGGUNAKAN TRANSPONDER DOPPLER DUA-FREKUENSI (ROCKET SPEED TRACKING METHOD USING TWO-FREQUENCY DOPPLER TRANSPONDER) Widada, Wahyu
Indonesian Journal of Aerospace Vol. 11 No. 1 Juni (2013): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

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Sistem Doppler tracking untuk roket biasanya hanya menggunakan satu frekuensi pembawa. Tulisan ini membahas sebuah metode Doppler radio pelacak roket dengan menggunakan dua frekuensi gelombang radio. Sistem ini menggunakan transponder Doppler pada frekuensi 465 MHz dan 2400 MHz secara simultan. Radio frekuensi rendah digunakan untuk mengukur kecepatan-tinggi roket dan sebaliknya gelombang radio frekuensi lebih tinggi digunakan untuk mengukur kecepatan rendah roket. Hasil yang diperoleh dari metode ini lebih akurat 5.4 kali pada kecepatan kurang dari 0.7 Mach dibandingkan dengan hasil dari sistem Doppler yang menggunakan hanya satu frekuensi radio. Metode ini cocok untuk mengukur kecepatan roket hingga 3.8 Mach.
METODE KALIBRASI SENSOR RATE-GYROSCOPE UNTUK IMU ROKET [CALIBRATION METHOD OF RATE-GYROSCOPE SENSOR FOR IMU ROCKET] Wahyudi; Susanto, Adhi; Widada, Wahyu; Hadi, Sasongko Pramono
Indonesian Journal of Aerospace Vol. 10 No. 2 Desember (2012): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

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Abstract

Rate-gyroscope sensor is used in the IMU to measure the rotation angle in three axes. The output of rate-gyroscope sensor is a voltage which is the angular rate, so to obtain the angle used once an integral process. The integral result of rate-gyroscope sensor depend on sampling time or the cycle time of program to get the datum, so the integral calculation depends on the processor speed of microcontroller (computer). Using of the different sampling time will affect the integral result or in other words we can say that for the same program, if we apply it to a different microcontroller, we will obtain the different calculation. This paper presents the calibration method for determining the calibration factor on the rate-gyroscope sensor, so we will get the actual angle value. The rate-gyroscope sensors on different axes have different characteristics, so each sensor needs to be calibrated. In the experiment results, the calibration factors in three axes are different in both for the clockwise rotation and counterclockwise rotation.
METODE DOPPLER RADIO UNTUK MENGUKUR KECEPATAN ROKET RX200 [RADIO DOPPLER METHOD FOR MEASURING VELOCITY OF ROCKET RX200] Widada, Wahyu
Indonesian Journal of Aerospace Vol. 10 No. 2 Desember (2012): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

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Abstract

This paper discusses the methods and design of radio Doppler to measure the speed of the rocket type RX200. Doppler system consists of a radio transponder to emit a continuous radio signal from the rocket and the radio base station to measure the change in frequency of the radio signal. A change in the frequency of the radio signal caused by the speed of the rocket is used to measure the speed and position of the rocket. The design of radio frequency is 880 MHz transponder adapted to the design speed of the rocket RX200. This method is relatively easy to implement compared with the radar transponder system that has been developed. A simulation of Doppler frequency is performed using the radar data transponder rocket launch experiment RX200 and recomendation of bandwith radio receiver should be 4000 Hz. The combination of these two systems will make a more acurate and reliable tracking system.
METODE KALIBRASI RADAR TRANSPONDER ROKET MENGGUNAKAN DATA GPS (CALIBRATION METHOD OF RADAR TRANSPONDER FOR ROCKET USING GPS DATA) Widada, Wahyu
Indonesian Journal of Aerospace Vol. 10 No. 1 Juni (2012): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

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Abstract

This paper discusses the method of calibration of radar transponders for the rocket launch applications using GPS data. Calibration is performed by measuring the distance of two positions with GPS data and used as a reference for the calibration range radar transponder. Transponder is placed on the measured position and the radar transceiver is placed in a position of radar base station. The obtained results shows that the calibration method is very easy to do, reference to a longer distance can improve the accuracy result of the calibration. We obtained a calibration factor value for the radar system used in the experiment is 0.9275..Keywords: Radar transponder, GPS, Google-earth, Calibration method
ALGORITMA DETEKSI SUDUT AZIMUT DAN ELEVASI ROKET MENGGUNAKAN SEMBILAN ANTENA ARRAY YAGI-UDA Zain, Satria Gunawan; Susanto, Adhi; Widodo, Thomas Sri; Widada, Wahyu
Indonesian Journal of Aerospace Vol. 9 No. 1 Juni (2011): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

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Abstract

Radiation pattern of Yagi-Uda antenna is elliptical. This pattern can be used as a detector for the direction of the source of a radio emission. A total of nine Yagi-Uda antennas fitted with a 3x3 configuration. With this configuration, the measurement range for azimuth and elevation angles can reach 80ยบ. The simulation was performed by using an antenna radiation pattern data. The number of antennas used for this simulation is nine. Then the data is merged into a 3x3 antenna configuration data. Based on data from nine antenna radiation patterns, the algorithm for the estimation of azimuth and elevation angles can be applied. Simulation results show that the measurement error of the signal without noise is close to zero. The algorithm used in this simulation can be applied to noise below 25%.
RANCANG BANGUN PROTOTIPE SISTEM HEADING AUTOPILOT BERBASIS RATE-GYROSCOPE DAN MICROCONTROLLER Widada, Wahyu
Indonesian Journal of Aerospace Vol. 4 No. 2 (2006): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

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Abstract

This paper discusses an experiment result of the prototype system feedback control for vehicle heading autopilot. The heading angle is measured with a rate-gyroscope and controlling with a control system based on a microcontroller and a stepper motor. This system is successfully realized within 0.5 degree of the error for heading angle. The accuracy of heading sensor is decrease due to vibration from stepper motor. To overcome such problem we recommended to use an analog lowpass filter and a mounting anti vibration.
PENGEMBANGAN MODEM AFSK UNTUK TELEMETRI MUATAN ROKET UHF Widada, Wahyu
Indonesian Journal of Aerospace Vol. 4 No. 1 (2006): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

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Abstract

Modem is an important component in the telemetry data system of the rocket. The telemetry data based on amateur radio is usually used an AFSK modem. This paper describes the development of AFSK modem using a microcontroller which the speed can be set to the maximum bandwidth of the radio. The prototype is use a 16 MHz of microcontoller and the speed can be set to 2.4 kbps that available to the standard bandwidth of an amateur radio.
RANCANG-BANGUN SISTEM FLIGHT-RECORDER SEDERHANA UNTUK PELUNCURAN ROKET Widada, Wahyu
Indonesian Journal of Aerospace Vol. 2 No. 2 (2004): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.jtd.2004.v2.a805

Abstract

In the rocket launch campaign, the telemetry system is very important system in order to send various data from the sensor to the base-station. However the signal of telemetry is not usually in good condition, and the data is very dificult to analyze. In this paper described the method to backup the sensor data by use of flight-recorder. It was very useful if the recovery of payload was successful, and the data flight can be analyze. The system used 2 wire serial eeprom with 131.071 byte of memory and 6 input for analog channels. The speed recording was 10 ms or 100 data per second.
Co-Authors Adhi Susanto Adi Susanto Alias, Norma Anggoro, Abdurrobbil Falaq Anggoro, Abdurrobbil Falaq Dwi Anggoro, Shadaqnas Dewarif Tri DEWI HERAWATY Ismoen, Muhaimin Izwanto, Eddy Masri Masri Nirwana, Nirwana Nugroho, Khathibul Umam Z Pambudi, Galih Ageng Rahmat Jumri romi wiryadinata Sarwoedi, Sarwoedi Sasongko Pramono Hadi Sri Kliwati Syah, Agus Harno Nurdin Thomas Sri Widodo WAHYUDI Wahyudi Wahyudi Zain, Satria G.