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All Journal BERKALA FISIKA YOUNGSTER PHYSICS JOURNAL Journal of Physics and Its Applications Jurnal Fisika Indonesia
Ainie Khuriati R.S.
Department Of Physics, Faculty Of Science And Mathematics, Diponegoro University, Semarang
Astronomy Earth & Planetary Sciences Education Energy Materials Science & Nanotechnology Physics

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Journal : BERKALA FISIKA

 1 
APLIKASI PRAKTIS MODEL IDENTIFIKASI AUTOREGRESSIVE MOVING AVERAGE EXOGENOUS (ARMAX) DENGAN METODA KUADRAT TERKECIL REKURSIF Khuriati RS, Ainie
BERKALA FISIKA Vol 14, No 4 (2011): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

AbstractEffect on variations in power heating to air temperature in the mosquito box were modelled. Transfer function for temperature ranges from 34.93 oC to 39.93 C determinedexperimentally. A step function used to excite power control and its effect on the air temperaturemeasured. From these information, the transfer function in the ARX and ARMAX form determinedand compared. An analysis of the computational results has confirmed that the ARMAX model andthe recursive least square method are superior to the ARX model and the Extended Least Square method to model the thermal behaviour in the mosquito box as indicated by the level of fitting and system stabilitytedKeywords: Identification, prediction error method, caged mosquitoes
IDENTIFIKASI DAN PERANCANGAN PENGENDALI PID MENGGUNAKAN PENDUGA ARX TERHADAP SISTEM PEMANAS UDARA DENGAN KRITERIA ISE, IAE, ITSE DAN ITAE Khuriati RS, Ainie
BERKALA FISIKA Vol 15, No 4 (2012): Berkala Fisika
Publisher : BERKALA FISIKA

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In this paper ARX estimation methodology used to design a PID controller  for  temperature control of the air heater. The step input applied  on heating systems and logging the data   to MATLAB via a data acquisition system. The data obtained is used to identify the model ofthe process in the form of ARX estimator. PID parameters obtained by minimising the  standard errors integral(IAE, ISE, ITSE and ITAE).Keywords: PID controller, Tuning, ARX Identication, Error Integral ,and air heater
PERANCANGAN SISTEM PENGENDALIAN SUHU DENGAN PENGENDALI PID MENGGUNAKAN ESTIMASI ARX Khuriati RS, Ainie
BERKALA FISIKA Vol 15, No 1 (2012): Berkala Fisika
Publisher : BERKALA FISIKA

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In this paper ARX estimation methodology used to design a PID controller  for  temperature control of the air heater. The step input applied on heating systems and logging the  data   toMATLAB via a data acquisition system. The data obtained is used to identify the model of the processin the form of ARX. PID parameters obtained by minimising a standard  integral errors using theleast squares  method. Then,  the results were compared with the classical methodsKeywords:  PID, Identification,  air heater
APLIKASI IMC BERBASIS STRATEGI PENALAAN PENGENDALI PID DIGITAL PADA SISTEM PEMANAS UDARA Khuriati RS, Ainie
BERKALA FISIKA Vol 15, No 2 (2012): Berkala Fisika
Publisher : BERKALA FISIKA

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This paper investigated  an application of the methodology that was developed by Rivera, a methodology to obtain reduced-order models that satisfy the Prett-Garcıa digital PID tuningrules, using prefiltered ARX estimation as a  basis. The  method was applicated as the temperaturecontrol system on theair heater. IMC-PID controller is not only superior but it has a simple andgeneral structure such as that of a PID controller too.Keywords:  PID digital , IMC, ARX model.
KOMPUTERISASI TABEL SIFAT-SIFAT TERMODINAMIK DARI H2O, R-12, DAN R-22 (PROTAMIK) Khuriati RS, Ainie; Detika, Detika; Bawono P, Ari
BERKALA FISIKA Vol 16, No 1 (2013): Berkala Fisika
Publisher : BERKALA FISIKA

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A computer program has been created which is used to display the thermodynamic properties (T, p, v, u, h, and s) of the working fluid of the commonly used on the power generation and processindustries,  H2O, R-12, and R-22. It  also calculates  the thermodynamic properties as function of  saturationtemperature and quality and saturation  pressure and quality. Program was developed using the thermodynamic properties of steam properties from 1967 ASME Steam Table [1] andASHRAE tables [5].Keywords: thermodynamics, properties, steam tables, refrigerant tables, quality.
Disain Peredam Suara Berbahan Dasar Sabut Kelapa dan Pengukuran Koefisien Penyerapan Bunyinya Khuriati, Ainie; Komaruddin, Eko; Nur, Muhammad
BERKALA FISIKA Vol 9, No 1 (2006): Berkala Fisika
Publisher : BERKALA FISIKA

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research aims to determine sound absorption of absorber materials making from coconut coir composites. Absorber material have been made with different composition from coconut coir composites.             Twelve samples have been made. One of samples is natural coconut coir and the other are made from coco fiber and coco peat with certain compositions. From 12 samples, 10 samples have been tested. Absorption coefficients was measured by impedance tube method with ASTM E-1050:1990 standardization.              The experiment results show that coconut coir is up to standard for absorber material according to ISO 11654 , that is with weigthed absorption (aw) over 0,15.  Weigthed absorption of samples are, A:0,30; B:0,44;C:0,27;D:0,44; E:0,51; F:0,44; G :0,47; H:0,49; I:0,31;J:0,41.  So samples A,B,D,E,F,G,H,I and J can be classified in class-D while sample C in class-E.   Absorber materials that have been made are also compatible with marketed products.  The best composition for absorber was mixture of coco dust and coco fiber.  Improving amount of coco fiber improve maximum absorption.  Adding air cavity between samples and wall improve absorption.  Improving mass density of sample making with similar total mass of composition and similar glue improve absorption in low frequency.   Keyword: coconut coir, coco fiber, coco peat, sound absorber, impedance tube, absorption coefficient, pore.
OTOMASI SISTEM PENGENDALIAN SUHU PADA INSINERATOR UNGGUN TETAP MENGGUNAKAN PENGENDALI DUA POSISI Khuriati, Ainie
BERKALA FISIKA Vol 24, No 3 (2021): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

Tungku  pembakaran  adalah    bagian  paling  penting  dari  insinerator  dimana  pembakaran berlangsung.    Pengendalian  suhu  tungku  menjadi  sangat  penting  dalam  pengoperasian  sebuah incinerator  terutama  untuk  meminimalkan  emisi.  Pengendalian  suhu  dilakukan  dengan menggunakan  pengendali  dua  posisi  tipe  T2N4S-14R,  relai,  dan  solenoida  sebagai  aktuator. Sensor  suhu  menggunakan  termokopel  tipe  K.  Bahan  bakar  menggunakan  liquid  petroleum  gas (LPG). Pengujian dilakukan dengan dua buah setpoint masing-masing sebesar 400oC dan 300oC pada ruang bakar utama. Setpoin dicapai hanya memerlukan waktu 35 detik dan 20 detik untuk masing-masing setpoint. Makalah ini difokuskan pada pengendalian suhu secara eksperimental.
Co-Authors Ari Bawono P Detika Detika Eko Komaruddin Ibnu Sulistiyono Muhammad Nur