Vol. 2 No. 1 (2010)

A current loop receiver system based on a microcontroller has been developed. The current loop receiver system can serve 8 gas sensors with 4-20 mA outputs, which are handled by employing a multiplexer. The data acquisition of the system is composed of a common operational amplifier-based current loop receiver, a CD4051 multiplexer, an ADS7822 serial analog to digital converter (ADC), and an AT89S52 microcontroller. The measured gas concentration is displayed on the 7-segments or transmitted to a personal computer via the RS232 serial communication to be processed by the Microsoft Excel.…

The hardware and software of the Keithley 617 Programmable Electrometer System, which is used for electrical characterization of materials and devices, have been automated so that users can work under convenient environment. The main constraint in automation of the system was budget. It was decided that the PCL488 ISA card is reused. The computer supporting the ISA bus was Pentium II with 128 Megabytes of RAM and the best operating system for the Pentium II computer was Windows 98 SE. The software driver for the PCL488 card was also updated to be CEC488 v7, which is the latest version for…

Through this research a study has been introduced for adaptive education at the Open University. Through reviewing a number of systems available in this field ABAH system have been selected as a system built basically on the AHA! Adaptive system which provides both adaptive presentation as well as navigation, to solve the problem of the direct discussion among the students and the teacher which is not supported by AHA! or any other system. A proposal is introduced as an adaptive discussion tool with customized interface presenting guidance for the student to defining the appropriate students…

Kontrol Model Prediksi adalah suatu strategi kontrol yang dirancang dengan menggunakan model dari proses suatu sistem. Model proses ini digunakan untuk menghitung himpunan prediksi ke depan dari proses tersebut berdasarkan himpunan sinyal kontrol yang diberikan pada model. Himpunan sinyal kontrol tersebut diperoleh dari suatu algoritma optimisasi yang meminimalkan fungsi kinerja MPC dan solusinya memenuhi kendala sistem. Oleh karena itu, pemilihan model yang tepat akan mempengaruhi kinerja dari pengontrol.Optimisasi merupakan bagian terpenting pada perhitungan sinyal control ke depan pada…

Algoritma merupakan bagian penting dalam sistem kontrol robot. Terdapat banyak metode yang biasa digunakan untuk keperluan ini, salah satunya adalah random walks. Metode ini menitikberatkan pada estimasi gerakan berdasarkan bilangan random (acak). Disisi lain aplikasi pengolahan citra masih belum banyak digunakan sebagai alat kontrol. Makalah ini akan membahas model dan simulasi metode random walks untuk kontrol gerak robot pada citra yang sederhana. Kata Kunci:random walks, citra

It is essential that a chemical process plant is built based on a design that integrates the structural, operational and economic considerations. However, accomplishing such goal for a small section of a process system demands significant computational efforts. This project investigates the computational tractability of a mathematical optimization algorithm dedicated for such process control design, the Dynamic Operability Framework. The target output is a worst case computational cost of utilizing the framework to solve a process control design problem in comparison with a standard Mixed…