Achmad Widodo | Diponegoro University (original) (raw)
Papers by Achmad Widodo
Machinery condition monitoring is increasingly important in industry due to the need to improve r... more Machinery condition monitoring is increasingly important in industry due to the need to improve reliability and reduce the possibility of production loss due to machinery breakdown. Vibration monitoring is the most widely used method for machinery condition monitoring and is considered the most effective method to detect defect in rotating machinery. Therefore, accurate features of vibration signals are required in fault diagnosis of machinery.
Rotating machines and reciprocating machines like turbines, combustion engines and electric motor... more Rotating machines and reciprocating machines like turbines, combustion engines and electric motor are the most widely used in industry. These machine consist of components which generate vibration dan heat during operation. Excessive vibration and heat can be indicators of fault in the machine. Therefore, machine condition monitoring is needed to monitor the real time machine condition with proper devices and methods. One of those being developed now is using infrared thermography.
Electricity has become the unseparated part in human's life, at the other hand fossil energy sour... more Electricity has become the unseparated part in human's life, at the other hand fossil energy sources that are commonly used at present give a negative influence on environment. Therefore, the use of environmentally friendly energy sources and renewable must be started now. Renewable energy sources are unlimited energy sources, one of these is wind energy. In order to realize the wind energy, it need wind turbine which one of its main component is the blade.
This paper deals with the maintenance technique for industrial machinery using the artificial neu... more This paper deals with the maintenance technique for industrial machinery using the artificial neural network so-called self-organizing map (SOM). The aim of this work is to develop intelligent maintenance system for machinery based on an alternative way, namely, thermal images instead of vibration signals. SOM is selected due to its simplicity and is categorized as an unsupervised algorithm. Following the SOM training, machine fault diagnostics is performed by using the pattern recognition technique of machine conditions.
Abstract Aplikasi Unmanned Aerial Vehicle (UAV) membutuhkan Inertial Measurement Unit (IMU) untuk... more Abstract Aplikasi Unmanned Aerial Vehicle (UAV) membutuhkan Inertial Measurement Unit (IMU) untuk meningkatkan kecepatan akurasi manuver. IMU yang umum digunakan yaitu jenis lowcost yang mudah dimodifikasi dan didapatkan di pasaran. IMU low cost membutuhkan kalibrasi untuk memverifikasi kesalahan-kesalahan akibat hardware pada rangkaian. Kalibrasi IMU menggunakan platform yang dirancang dengan referensi dari sistem carpal wrist device.
Drilling machine is one of the most important machine tools in industry except lathe and frais ma... more Drilling machine is one of the most important machine tools in industry except lathe and frais machine. Drilling machine has an important role on production proceses. But, vibration while drilling operation that caused by chatter or machine faults made the product output failure. One of the machine faults types is mass unbalance that can reduce the quality of product geometry. Therefore, dynamic behaviour analyze is necessary to prevent this mass unbalance will not happen.
Giving of vibration effect during solidification process of cast material from metal alloy of Al-... more Giving of vibration effect during solidification process of cast material from metal alloy of Al-Si, have yielded the softer silicon particle size and apportionment at aluminum matrix. With the silicon particle size attenuation, obtained better mechanic properties, which especially shown by higher level tensile strength if compared to the cast material from solidification process which not vibrated.
An elevator which also called as lift is handling equipment that is often applied at high rinse b... more An elevator which also called as lift is handling equipment that is often applied at high rinse building. In this lift design, designs a lift that applied at 20 floors building, with lift's overall height equal to 80m. The applied method for this design is do observation, then do the phase of design with known standards, and literature study. From this design, lift uses induction motor with 11kW of energy that equiped by VVVF control systems. The car, which is loading 15 people, pulled by 6 wire ropes 8x19 type with 13mm of diameter.
Abstract Penelitian ini membahas penggalian informasi fitur citra dijital obyek (mesin) yang diha... more Abstract Penelitian ini membahas penggalian informasi fitur citra dijital obyek (mesin) yang dihasilkan dari tangkapan kamera termografi inframerah. Hasil tersebut selanjutnya diolah dengan metode pengolah citra dijital semisal segmentasi dan pengklasteran citra. Ekstraksi fitur citra dilakukan dengan menghitung luas titik panas pada daerah tinjauan yaitu pada bagian bantalan mesin.
The purposes of this paper are (a) to illustrate patterns of development of not only public expen... more The purposes of this paper are (a) to illustrate patterns of development of not only public expenditures on education and health sectors, indicators of human development, and poverty indicators in Central Java province,(b) to identify and analyze the role of the Human Development Index (HD!) with regards to the relationship between government spending for education and health sectors and poverty reduction in the province: whether the Hal as a moderator variable or intervening variable.
Maintenance memiliki peran penting dalam dunia industri saat ini. Fakta di lapangan menunjukkan b... more Maintenance memiliki peran penting dalam dunia industri saat ini. Fakta di lapangan menunjukkan bahwa kontribusi biaya maintenance memiliki porsi yang cukup besar atas biaya total produksi pada semua bidang industri. Salah satu teknik perawatan yang digunakan saat ini dan berkontribusi besar atas peningkatan efektifitas dan efisiensi perawatan adalah perawatan berbasis kondisi (condition based maintenance-CBM).
Machinery condition monitoring is increasingly important in industry due to the need to improve r... more Machinery condition monitoring is increasingly important in industry due to the need to improve reliability and reduce the possibility of production loss due to machinery breakdown. Vibration monitoring is the most widely used method for machinery condition monitoring and is considered the most effective method to detect defect in rotating machinery. Therefore, accurate features of vibration signals are required in fault diagnosis of machinery.
Rotating machines and reciprocating machines like turbines, combustion engines and electric motor... more Rotating machines and reciprocating machines like turbines, combustion engines and electric motor are the most widely used in industry. These machine consist of components which generate vibration dan heat during operation. Excessive vibration and heat can be indicators of fault in the machine. Therefore, machine condition monitoring is needed to monitor the real time machine condition with proper devices and methods. One of those being developed now is using infrared thermography.
Electricity has become the unseparated part in human's life, at the other hand fossil energy sour... more Electricity has become the unseparated part in human's life, at the other hand fossil energy sources that are commonly used at present give a negative influence on environment. Therefore, the use of environmentally friendly energy sources and renewable must be started now. Renewable energy sources are unlimited energy sources, one of these is wind energy. In order to realize the wind energy, it need wind turbine which one of its main component is the blade.
This paper deals with the maintenance technique for industrial machinery using the artificial neu... more This paper deals with the maintenance technique for industrial machinery using the artificial neural network so-called self-organizing map (SOM). The aim of this work is to develop intelligent maintenance system for machinery based on an alternative way, namely, thermal images instead of vibration signals. SOM is selected due to its simplicity and is categorized as an unsupervised algorithm. Following the SOM training, machine fault diagnostics is performed by using the pattern recognition technique of machine conditions.
Abstract Aplikasi Unmanned Aerial Vehicle (UAV) membutuhkan Inertial Measurement Unit (IMU) untuk... more Abstract Aplikasi Unmanned Aerial Vehicle (UAV) membutuhkan Inertial Measurement Unit (IMU) untuk meningkatkan kecepatan akurasi manuver. IMU yang umum digunakan yaitu jenis lowcost yang mudah dimodifikasi dan didapatkan di pasaran. IMU low cost membutuhkan kalibrasi untuk memverifikasi kesalahan-kesalahan akibat hardware pada rangkaian. Kalibrasi IMU menggunakan platform yang dirancang dengan referensi dari sistem carpal wrist device.
Drilling machine is one of the most important machine tools in industry except lathe and frais ma... more Drilling machine is one of the most important machine tools in industry except lathe and frais machine. Drilling machine has an important role on production proceses. But, vibration while drilling operation that caused by chatter or machine faults made the product output failure. One of the machine faults types is mass unbalance that can reduce the quality of product geometry. Therefore, dynamic behaviour analyze is necessary to prevent this mass unbalance will not happen.
Giving of vibration effect during solidification process of cast material from metal alloy of Al-... more Giving of vibration effect during solidification process of cast material from metal alloy of Al-Si, have yielded the softer silicon particle size and apportionment at aluminum matrix. With the silicon particle size attenuation, obtained better mechanic properties, which especially shown by higher level tensile strength if compared to the cast material from solidification process which not vibrated.
An elevator which also called as lift is handling equipment that is often applied at high rinse b... more An elevator which also called as lift is handling equipment that is often applied at high rinse building. In this lift design, designs a lift that applied at 20 floors building, with lift's overall height equal to 80m. The applied method for this design is do observation, then do the phase of design with known standards, and literature study. From this design, lift uses induction motor with 11kW of energy that equiped by VVVF control systems. The car, which is loading 15 people, pulled by 6 wire ropes 8x19 type with 13mm of diameter.
Abstract Penelitian ini membahas penggalian informasi fitur citra dijital obyek (mesin) yang diha... more Abstract Penelitian ini membahas penggalian informasi fitur citra dijital obyek (mesin) yang dihasilkan dari tangkapan kamera termografi inframerah. Hasil tersebut selanjutnya diolah dengan metode pengolah citra dijital semisal segmentasi dan pengklasteran citra. Ekstraksi fitur citra dilakukan dengan menghitung luas titik panas pada daerah tinjauan yaitu pada bagian bantalan mesin.
The purposes of this paper are (a) to illustrate patterns of development of not only public expen... more The purposes of this paper are (a) to illustrate patterns of development of not only public expenditures on education and health sectors, indicators of human development, and poverty indicators in Central Java province,(b) to identify and analyze the role of the Human Development Index (HD!) with regards to the relationship between government spending for education and health sectors and poverty reduction in the province: whether the Hal as a moderator variable or intervening variable.
Maintenance memiliki peran penting dalam dunia industri saat ini. Fakta di lapangan menunjukkan b... more Maintenance memiliki peran penting dalam dunia industri saat ini. Fakta di lapangan menunjukkan bahwa kontribusi biaya maintenance memiliki porsi yang cukup besar atas biaya total produksi pada semua bidang industri. Salah satu teknik perawatan yang digunakan saat ini dan berkontribusi besar atas peningkatan efektifitas dan efisiensi perawatan adalah perawatan berbasis kondisi (condition based maintenance-CBM).