Studi Banding Metode Modifikasi Vektor Kueri Fuzzy dan Fungsi Basis Radial Fuzzy Untuk Perolehan Citra

This paper describes the use of Fuzzy Query Vector Modification (QVM) and Fuzzy Radial Basis Function (RBF) method for image retrieval. Both methods used relevant feedback process to obtain images according to the wishes of the user. The proposed research is Fuzzy QVM method uses six levels, consisting of: very relevant, relevant, few relevant, vague, non relevant, and very non relevant. Fuzzy RBF method uses three levels, consists of relevant, fuzzy, and non relevant. Testing is done by calculating the precision value at several recall levels. The result test is known as Fuzzy QVM method provides higher precision than Fuzzy RBF with comparative value is 1 : 0.8255.  The research concluded the Fuzzy QVM method better performance than Fuzzy RBF method. Pada makalah ini diuraikan tentang penggunaan metode Modifikasi Vektor Kueri (MVK) Fuzzy dan Fungsi Basis Radial (FBR) Fuzzy untuk perolehan data citra. Kedua metode tersebut digunakan dalam proses umpanbalik relevansi untuk mendapatkan citra yang sesuai dengan keinginan pengguna. Penelitian yang diusulkan adalah metode MVK Fuzzy dengan enam tingkat relevansi yang terdiri dari: sangat relevan, relevan, sedikit relevan, samar-samar, tidak relevan, dan sangat tidak relevan. Metode FBR Fuzzy menggunakan tiga tingkatan yang terdiri dari relevan, fuzzy, dan tidak relevan. Pengujian dilakukan untuk membandingan kinerja metode MVK Fuzzy dengan FBR Fuzzy melalui perhitungan nilai precision recall. Dari penelitian ini dapat disimpulkan bahwa metode MVK Fuzzy mempunyai kinerja yang lebih baik dibandingkan dengan metode FBR Fuzzy

Studi Banding Metode Modifikasi Vektor Kueri Fuzzy Dan Fungsi Basis Radial Fuzzy Untuk Perolehan Citra

Pada makalah ini diuraikan tentang penggunaan metode Modifikasi Vektor Kueri (MVK) Fuzzy dan Fungsi Basis Radial (FBR) Fuzzy untuk perolehan data citra. Kedua metode tersebut digunakan dalam proses umpanbalik relevansi untuk mendapatkan citra yang sesuai dengan keinginan pengguna. Penelitian yang diusulkan adalah metode MVK Fuzzy dengan enam tingkat relevansi yang terdiri dari: sangat relevan, relevan, sedikit relevan, samar-samar, tidak relevan, dan sangat tidak relevan. Metode FBR Fuzzy menggunakan tiga tingkatan yang terdiri dari relevan, fuzzy, dan tidak relevan. Pengujian dilakukan untuk membandingan kinerja metode MVK Fuzzy dengan FBR Fuzzy melalui perhitungan nilai precision recall. Dari penelitian ini dapat disimpulkan bahwa metode MVK Fuzzy mempunyai kinerja yang lebih baik dibandingkan dengan metode FBR Fuzzy

RANCANGAN DAN PEMBUATAN INPUT OUTPUT SERVER PADA SISTEM TELEMETRI AIR BAWAH TANAH

Sistem Telemetri Air Bawah Tanah (ABT) adalah suatu sistem pengukuran air bawah tanah yang dilakukan dari jarak jauh. Air bawah tanah yang diukur berupa penggunaan air sumur yang terpasang pada beberapa indusri atau perusahaan. Dalam penelitian ini, telah dilakukan perancangan dan pembuatan perangkat lunak Input Output Server (IOS) pada sistem telemetri ABT, yang merupakan pengembangan IOS pada sistem telemetri Puslit KIM LIPI. Perancangan dan pembuatan IOS ini menggunakan protokol modbus untuk komunikasi dengan Remote Terminal Unit (RTU) dan protokol Object Linking and Embedding (OLE) for Process Control (OPC) untuk komunikasi dengan Man Machine Interface (MMI). Pada program IOS, ditampilkan nama-nama RTU, data yang dikirim maupun yang diterima dari RTU, data yang dikirim ke MMI, serta daftar nama sumur yang pemakaian airnya melebihi batas. Perancangan dan pembuatan IOS ini, telah sesuai dengan fungsinya yaitu : pengambilan data penggunaan air sumur, pengolahan data, pengiriman data ke MMI, penyimpanan data ke file database serta pencetakan data lewat printer.Hlm. 23-2

TRANSMISI DATA TELEMETRI MELALUI SMS

Dalam makalah ini dibahas tentang pengiriman data yang dilakukan untuk Sistem Telemetri ABT (Air Bawah Tanah ) yang sedang dilakukan. Sistem ini direncanakan dipasang pada 3 kota dan pusat kontrol terdapat di salah satu kota tersebut. Dan saat ini sistem sudah dipasang di satu kota. Selama ini untuk pengiriman hasil pengukuran digunakan radio tetapi biaya relatif tinggi dan jarak yang terbatas. Maka pada penelitian ini memanfaatkan ketersediaan sarana GSM-SMS pada telepon celular. Dengan menggunakan sarana SMS jarak tidak menjadi kendala dan efisiensi biaya pun dapat dilakukan.Hlm.42-4

Variable-structure repetitive control for discrete-time linear systems with multiple-period exogenous signals

A new method to construct a discrete-time variable-structure repetitive controller for a class of linear systems perturbed by multiple-period exogenous signals is presented. The proposed control scheme combines the features of the discrete-time multiple-period repetitive control (MP-RC) and variable-structure control (VSC) techniques. The MP-RC part is assigned to simultaneously track and reject periodic signals consisting of multiple uncorrelated fundamental frequencies. The VSC part is then integrated to provide a fast transient response and robustness against plant parameter variations. Stability and robustness analyses are also elaborated to ensure that the resulting closed-loop system satisfies the desired control objectives. Moreover, it is shown through an example that the repetitive control system constructed using the proposed control method can effectively track a sinusoidal reference signal despite the presence of a multiple-period disturbance

Variable–structure repetitive control for discrete–time linear systems with multiple–period exogenous signals

A new method to construct a discrete-time variable-structure repetitive controller for a class of linear systems perturbed by multiple-period exogenous signals is presented. The proposed control scheme combines the features of the discrete-time multiple-period repetitive control (MP-RC) and variable-structure control (VSC) techniques. The MP-RC part is assigned to simultaneously track and reject periodic signals consisting of multiple uncorrelated fundamental frequencies. The VSC part is then integrated to provide a fast transient response and robustness against plant parameter variations. Stability and robustness analyses are also elaborated to ensure that the resulting closed-loop system satisfies the desired control objectives. Moreover, it is shown through an example that the repetitive control system constructed using the proposed control method can effectively track a sinusoidal reference signal despite the presence of a multiple-period disturbance

Discrete-Time Design of Dual Internal Model-Based Repetitive Control Systems

This paper presents a novel design of discrete-time dual internal model-based repetitive control systems. The design strategy is accomplished by combining general and high-order modified repetitive control schemes for simultaneous tracking repetitive tasks and rejection of uncertain periodic disturbances. The proposed controller is constructed from two different discrete-time internal models, rendering a dual internal model-based repetitive controller (DIMRC). The first internal model is intended to track repetitive commands with a fixed fundamental frequency. Meanwhile, the second internal model is coupled to compensate for an exogenous periodic disturbance with an uncertain frequency. The controller structure, stability conditions, and convergence analysis are discussed in this paper. The performance of the proposed controller is validated through simulation studies showing accurate tracking and excellent disturbance rejection simultaneously

Experimental Design of Fast Terminal Sliding Mode Control for Valve Regulation under Water Load Uncertainty for Precision Irrigation

The application of control systems in precision irrigation is critical to ensure the accurate distribution of water in crops under various uncertainties. Shifts in the loading of the water supply on the control valve can be a significant uncertainty. Changes in weather and the uncertainty of the water level in the reservoir are also challenging issues. Sliding Mode Control (SMC) is a robust control technique that is simple to apply to deal with uncertainty, while Fast Terminal Sliding Mode Control (FTSMC) has the benefit of the rapid convergence. The DC electric motor, which is a common component of electric control valves, can be employed in designing control techniques for precision irrigation applications. This study aims to design a proposed experimental-based method, namely FTSMC for valve regulation under water load uncertainty for precision irrigation application. Modification of the signum function should be used to eliminate the chattering effect in real experiments.The results of experiments showed that the proposed method was superior to the conventional Proportional Integral Derivative (PID) and traditional SMC techniques in terms of overshoot, convergence rate and error. Because of those reasons, the FTSMC approach should be implemented on control valves against load uncertainty in precision irrigation applications