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Kota ambon,
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INDONESIA
JURNAL SIMETRIK
Published by Politeknik Negeri Ambon
ISSN : 23029579     EISSN : 25812866     DOI : -
Core Subject : Science, Engineering,
Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Engineering
Jurnal SIMETRIK adalah jurnal yang mempublikasikan tentang bidang ilmu yang berkaitan dengan Teknik Sipil, Teknik Mesin, dan Teknik Elektro-Listrik, terbit secara berkala dua kali dalam setahun (Juni dan Desember). ISSN (Cetak) : 2302-9579 , ISSN (Online): 2581-2866.
Arjuna Subject : -
Articles 155 Documents
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EVALUASI STATISTIK KINERJA INVERTER FOTOVOLTAIK PADA VARIASI KONDISI IRRADIASI MATAHARI Normansyah, Normansyah; Darmawan, Heri
JURNAL SIMETRIK Vol 15 No 2 (2025): Desember
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat (P3M) Politeknik Negeri Ambon

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/js.v15i2.3507

Abstract

This study aims to conduct a comprehensive statistical evaluation of photovoltaic inverter performance under various solar irradiance conditions to identify operational characteristics and develop predictive performance models. The research methodology employs a quantitative approach with experimental design through primary data collection over 12 months using an integrated data acquisition system with pyranometer irradiance sensors, temperature sensors, and power analyzers on a 10 kW string inverter system. Data were categorized into five irradiance groups and analyzed using descriptive statistics, correlation analysis, polynomial regression, and ANOVA with SPSS and MATLAB software. Results show the highest average efficiency in the high irradiance category (96.9%) with the lowest coefficient of variation in moderate irradiance (2.19%). Strong positive correlation between irradiance and inverter efficiency (r = 0.762) and cubic regression predictive model demonstrate high accuracy (R² = 0.912, RMSE 1.89%). Variance analysis proves significant differences between irradiance categories (F = 1,234.56, p < 0.001) with 78.5% effect size. Temporal patterns show systematic seasonal variation with peak efficiency in May (96.2%) and annual-daily periodicity correlating with natural irradiance cycles. The research confirms the importance of statistical characterization for photovoltaic inverter performance optimization and development of adaptive operational strategies based on irradiance conditions. Keywords: photovoltaic inverter, statistical analysis, solar irradiance, energy efficiency, predictive model
Pemodelan Matematis dan Validasi Eksperimental Sistem Kontrol Motor Brushless DC Menggunakan Fuzzy Logic Radwitya, Erick; Alkadri, Syarif Ishak
JURNAL SIMETRIK Vol 15 No 2 (2025): Desember
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat (P3M) Politeknik Negeri Ambon

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/js.v15i2.3508

Abstract

Alinea Brushless DC (BLDC) motors require sophisticated control systems to optimize their performance in modern industrial applications. This research develops a comprehensive mathematical model using state-space approach and designs a fuzzy logic control system for BLDC motors with experimental validation. The mathematical model was developed based on electrical and mechanical parameter identification through DC and AC testing, resulting in high-accuracy system dynamics representation. The fuzzy logic control system was designed using Mamdani structure with 49 rules and optimized using Chameleon Swarm Algorithm. Experimental validation was conducted using a test bench platform with 500W BLDC motor and DSP-based control system. Model validation results showed RMSE values of 15.3-28.9 rpm for speed and coefficient of determination R² reaching 0.963-0.987. The fuzzy logic control system demonstrated superior performance with rise time 45.2 ms, settling time 132.5 ms, overshoot 2.8%, and steady-state error 0.5 rpm compared to conventional PID controller. Tracking performance testing yielded RMS error 3.2 rpm for sinusoidal reference and robustness evaluation showed good resistance to load disturbances. This research successfully integrated accurate mathematical modeling with adaptive control system that can be implemented in various industrial applications requiring high-precision motor control. Keywords: BLDC motor, fuzzy logic, mathematical modeling, control system, experimental validation
ANALISIS KONDISI PERKERASAN JALAN PADA RUAS JALAN DESA MORELLA Latukau, Hairani; Amaheka, Sammy G. M.; Wangean, Febrino
JURNAL SIMETRIK Vol 15 No 2 (2025): Desember
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat (P3M) Politeknik Negeri Ambon

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/js.v15i2.3217

Abstract

Roads are a vital transportation infrastructure that support all human activities. The increasing volume of vehicles each year has become one of the contributing factors to road damage in several regions of Indonesia. Infrastructure burdened by high and recurring traffic volumes will lead to a decline in road quality, both structurally and functionally. Observations were conducted on the road segment in Morella Village. The objective of this study is to determine an index value that can indicate the pavement condition and to identify the type of road treatment using the Pavement Condition Index (PCI) method. The study found the minimum index value on the Morella Village road segment was 67 at STA 0+300, which requires periodic improvement treatment, and the maximum index value was 100 at STA 0+200, requiring routine maintenance. Data analysis showed that the damage level on the Morella Village road segment from STA 0+000 to STA 2+000 is categorized as very good, with an average PCI value of 90.65, based on calculations of each 100-meter sample unit.  Keywords: pavement condition index, treatment
EVALUASI AKSESIBILITAS BAGI PENYANDANG DISABILITAS PADA GEDUNG RSUD DR. M. HAULUSSY KOTA AMBON Randy Pratama Putra; Buyang, C. G.; Taihuttu, Felix
JURNAL SIMETRIK Vol 15 No 2 (2025): Desember
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat (P3M) Politeknik Negeri Ambon

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/js.v15i2.3443

Abstract

Persons with disabilities have the same right to access facilities and infrastructure without discrimination, including public service facilities such as hospitals. This study aims to evaluate the level of accessibility compliance for persons with disabilities at RSUD Dr. M. Haulussy, Ambon City, based on the Regulation of the Minister of Public Works and Public Housing (Permen PUPR) No.14/PRT/M/2017. The research employed direct observation and measurement methods to assess the feasibility of existing facilities and infrastructure related to accessibility for persons with disabilities. The measurement data were compared with the standards stipulated in Permen PUPR No.14/PRT/M/2017. The compliance levels found were: doors 63.64%, corridors 100.00%, stairs 62.50%, ramps 80.00%, toilets 46.66%, and washbasins the lowest compliance at 25.00%. Based on the evaluation, the overall accessibility compliance of RSUD Dr. M. Haulussy was 62.97%, according to the technical requirements set out in Permen PUPR No.14/PRT/M/2017 concerning building accessibility requirements.Keywords: Accessibility, People with Disabilities, Hospitals
Tinjauan Fondasi Bore Pile Pada Struktur Dinding Penahan Tanah Jalan Waipia-Saleman I Kabupaten Maluku Tengah Renngur, Siti Hajar; Titaley, Henriette Dorothy; Abdin, Maslan
JURNAL SIMETRIK Vol 15 No 2 (2025): Desember
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat (P3M) Politeknik Negeri Ambon

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/js.v15i2.3484

Abstract

The foundation is a lower structure that transfers the load from the upper structure to the ground below. On the Waipia - Saleman I road section on Central Maluku Regency at STA 35+000, 200 m long cantilever retaining wall was built and combined with 60 cm diameter bore pile foundation with a depth of 14 m which functions to secure slope areas that are prone to landslides This study aims to calculate the load received by the bore pile foundation, the bearing capacity and the settlement that occurs in the bore pile foundation. The bearing capacity of a single pile is calculated from N-SPT data using conventional methods, namely the Maverhoff method and the Reese & O'Neil methods. The bearing capacity of the pile group is calculated using the efficiency value from the Converse-Labarre Formula. The calculation of the settlement of a single pile and the settlement of the pile group are calculated based on the Vesic method. Based on the calculation results, the smallest load on the bore pile foundation was 1502.88 kN, with a distributed load at the base of the retaining wall of 41.75 kN/m2. The calculation resulted of the single pile bearing capacity using the Mayerhoff method yielded an average allowable bearing capacity (Qall) of 153 7.34 kN, and using the Reese & O’Neil method, the lowest permissible bearing capacity (Qall) at Bore Hole 02 was 1118.67 kN. The smallest group pile allowable bearing capacity (Qgall) at Bore Hole 02 was 2505.82 kN. The settlement calculation of the bore pile foundation using the Vesic method for single piles (S) was 0.0420 m, and for group piles (Sg) was 0.0939 m, which was considered safe and technically acceptable because it was smaller than the allowable settlement (Si), which was 0.151 m.Keywords: Bore Pile Foundation, Bearing Capacity, Settlement

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