Implementasi Logika Fuzzy Pada Sistem Berbasis Field Programmable Gate Array (FPGA)

Penggunaan perangkat mikrokontroller dewasa ini semakin banyak dipergunakan seperti arduino, atmega, FPGA dan lain sebagainya. Salah satu perangkat tersebut adalah FPGA (Field Programmable Gate Array). Bahasa yang digunakan pada FPGA adalah VHDL atau VHSIC (Very High Speed Integrated Circuit Hardware Description Language) merupakan salah satu jenis bahasa yang digunakan untuk mendeskripsikan fungsi rangkaian digital. Pada penelitian ini akan dijelaskan tentang implementasi tentang dasar Logika Fuzzy pada VHDL. Sehingga memiliki keuntungan jika dilakukan implementasi ini akan didapatkan rancang bangun logika fuzzy yang memungkinkan untuk diimplementasikan dengan cepat pada perangkat seperti Xilinx, Synosis dan lain sebagainya. Pada penelitian ini berhasil diimplementasikan, proses pengujian dilakukan dengan membandingkan perhitungan matematis dengan hasil keluaran sistem yang didapatkan akurasi sebesar 80%. Akan tetapi proses waktu eksekusi total untuk semua proses dalam Logika Fuzzy sebesar 145 ns

Neurofuzzy controller based full vehicle nonlinear active suspension systems

To design a robust controller for active suspension systems is very important for guaranteeing the riding comfort for passengers and road handling quality for a vehicle. In this thesis, the mathematical model of full vehicle nonlinear active suspension systems with hydraulic actuators is derived to take into account all the motions of the vehicle and the nonlinearity behaviours of the active suspension system and hydraulic actuators. Four robust control types are designed and the comparisons among the robustness of those controllers against different disturbance types are investigated to select the best controller among them. The MATLAB SIMULINK toolboxes are used to simulate the proposed controllers with the controlled model and to display the responses of the controlled model under different types of disturbance. The results show that the neurofuzzy controller is more effective and robust than the other controller types. The implementation of the neurofuzzy controller using FPGA boards has been investigated in this work. The Xilinx ISE program is employed to synthesis the VHDL codes that describe the operation of the neurofuzzy controller and to generate the configuration file used to program the FPGA. The ModelSim program is used to simulate the operation of the VHDL codes and to obtain the expected output data of the FPGA boards. To confirm that FPGA the board used as the neurofuzzy controller system operated as expected, a MATLAB script file is used to compare the set of data obtained from the ModelSim program and the set of data obtained from the MATLAB SIMULINK model. The results show that the FPGA board is effective to be used as a neurofuzzy controller for full vehicle nonlinear active suspension systems. The active suspension system has a great performance for vibration isolation. However the main drawback of the active suspension is that it is high energy consumptive. Therefore, to use this suspension system in the proposed model, this drawback should be solved. Electromagnetic actuators are used to convert the vibration energy that arises from the rough road to useful electrical energy to reduce the energy consumption by the active suspension systems. The results show that the electromagnetic devices act as a power generator, i.e. the vibration energy excited by the rough road surface has been converted to a useful electrical energy supply for the actuators. Furthermore, when the nonlinear damper models are replaced by the electromagnetic actuators, riding comfort and the road handling quality are improved. As a result, two targets have been achieved by using hydraulic actuators with electromagnetic suspension systems: increasing fuel economy and improving the vehicle performance

Jurnal Teknologi Informasi dan Ilmu Komputer

Jurnal Teknologi Informasi dan Ilmu Komputer (JTIIK) merupakan jurnal nasional yang diterbitkan oleh Fakultas Ilmu Komputer (FILKOM), Universitas Brawijaya (UB), Malang sejak tahun 2014. JTIIK memuat artikel hasil-hasil penelitian di bidang Teknologi Informasi dan Ilmu Komputer

Implementing Fuzzy Control Systems Using VHDL and Statecharts

In this paper, we propose an approach for designing fuzzy controllers. To reduce design time, we employ two high-level design methods: VHDL and VHDL-based logic synthesis, and Statecharts with a VHDL backend for graphical design description. A fuzzifier and a defuzzifier parts of a fuzzy control system are captured in VHDL, as these parts perform complex arithmetical operations. A rule base of the controller is described in Statecharts, and then is translated into VHDL. A complete description of the system is assembled in VHDL, and is synthesized using VHDL-based logic synthesis. The efficiency of the generated hardware is explored for FPGA technology