• Title/Summary/Keyword: Control Logic Synthesis

Search Result 63, Processing Time 0.026 seconds

MDPS Analysis Software Development (MDPS 해석 소프트웨어 개발)

  • Jang, Bongchoon;Kim, Joung-Hoon;Yang, Sung-Mo
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.15 no.9
    • /
    • pp.5480-5486
    • /
    • 2014
  • Complete novel software for MDPS for the simulation and analysis is proposed for steering engineers. The software, MSAS, which can provide the functionality for MDPS Simulation, Analysis & Synthesis, is based on the steering system model, vehicle model and control logic. As the suppliers provide the control logic as a black box, this software is capable of using any type of black box logic or white box control logic that can be developed by logic designers. In addition, this software will be synthesized with the suppliers' s-function control logic and RMDPS together.

A Study on Optimal Synthesis of Multiple-Valued Logic Circuits using Universal Logic Modules U$_{f}$ based on Reed-Muller Expansions (Reed-Muller 전개식에 의한 범용 논리 모듈 U$_{f}$ 의 다치 논리 회로의 최적 합성에 관한 연구)

  • 최재석;한영환;성현경
    • Journal of the Korean Institute of Telematics and Electronics C
    • /
    • v.34C no.12
    • /
    • pp.43-53
    • /
    • 1997
  • In this paper, the optimal synthesis algorithm of multiple-valued logic circuits using universal logic modules (ULM) U$_{f}$ based on 3-variable ternary reed-muller expansions is presented. We check the degree of each varable for the coefficients of reed-muller expansions and determine the order of optimal control input variables that minimize the number of ULM U$_{f}$ modules. The order of optimal control input variables is utilized the realization of multiple-valued logic circuits to be constructed by ULM U$_{f}$ modules based on reed-muller expansions using the circuit cost matrix. This algorithm is performed only unit time in order to search for the optimal control input variables. Also, this algorithm is able to be programmed by computer and the run time on programming is O(p$^{n}$ ).

  • PDF

Fast Synthesis based on Ternary Universal Logic Module $U_h$ (3치 범용 논리 모듈 $U_h$에 의한 빠른 논리 합성)

  • 김영건;김종오;김흥수
    • Journal of the Korean Institute of Telematics and Electronics B
    • /
    • v.31B no.1
    • /
    • pp.57-63
    • /
    • 1994
  • The logic function synthesis using ULM U$_h$ is constructed based on canonic Reed-Muller expansion coefficient for a given function. This paper proposes the fast synthesis algorithm using ULM U$_h$ for ternary function. By using circuit cost and synthesis method of proposed in this paper, order of control input variable minimum number of ULM U$_h$ can be decided in the synthesis of n-variable ternary function. Accordingly, this method enables to optimum circuit realization for ternary function synthesis using ULM ULM U$_h$ and can be applied to ternary function synthesis using ULM U$_h$. The complexity of search for select the order of all control input variables is (n+2)(n-1)/2.

  • PDF

The Design of High Speed Processor for a Sequence Logic Control using FPGA (FPGA를 이용한 시퀀스 로직 제어용 고속 프로세서 설계)

  • Yang, Oh
    • The Transactions of the Korean Institute of Electrical Engineers A
    • /
    • v.48 no.12
    • /
    • pp.1554-1563
    • /
    • 1999
  • This paper presents the design of high speed processor for a sequence logic control using field programmable gate array(FPGA). The sequence logic controller is widely used for automating a variety of industrial plants. The FPGA designed by VHDL consists of program and data memory interface block, input and output block, instruction fetch and decoder block, register and ALU block, program counter block, debug control block respectively. Dedicated clock inputs in the FPGA were used for high speed execution, and also the program memory was separated from the data memory for high speed execution of the sequence instructions at 40 MHz clock. Therefore it was possible that sequence instructions could be operated at the same time during the instruction fetch cycle. In order to reduce the instruction decoding time and the interface time of the data memory interface, an instruction code size was implemented by 16 bits or 32 bits respectively. And the real time debug operation was implemented for easy debugging the designed processor. This FPGA was synthesized by pASIC 2 SpDE and Synplify-Lite synthesis tool of Quick Logic company. The final simulation for worst cases was successfully performed under a Verilog HDL simulation environment. And the FPGA programmed for an 84 pin PLCC package was applied to sequence control system with inputs and outputs of 256 points. The designed processor for the sequence logic was compared with the control system using the DSP(TM320C32-40MHz) and conventional PLC system. The designed processor for the sequence logic showed good performance.

  • PDF

Translating concurrent programs into petri nets for synthesis of asynchronous circuits (비동기회로 합성을 위한 병행 프로그램의 페트리 넷으로의 변환)

  • 유동훈;이동익
    • Proceedings of the IEEK Conference
    • /
    • 1998.06a
    • /
    • pp.883-886
    • /
    • 1998
  • We introduce a high level synthesis methodlogoy for automatic synthesis of asynchronous circuits form a language based on CSP. The input language is a high level concurrent algorithmic specification that can model complex concurrent control flow, logical and arithmetic computation and communications between them. This specification is translated into petri net which has actions. These actions are refined to synthesize the controllers and to allocate the data resources. We use the automatic synthesis through signal transition graphs (STGs) that allows to take advantage of logic synthsis methods to optimize the circuit.

  • PDF

An Implementation of Bit Processor for the Sequence Logic Control of PLC (PLC의 시퀀스 제어를 위한 BIT 연산 프로세서의 구현)

  • Yu, Young-Sang;Yang, Oh
    • Proceedings of the KIEE Conference
    • /
    • 1999.07g
    • /
    • pp.3067-3069
    • /
    • 1999
  • In this paper, A bit processor for controlling sequence logic was implemented, using a FPGA. This processor consists of program memory interface. I/O interface, parts for instruction fetch and decode, registers, ALU, program counter and etc. This FPGA is able to execute sequence instruction during program fetch cycle, because of divided bus system, program bus and data bus. Also this bit processor has instructions set that 16bit or 32bit fixed width, so instruction decoding time and data memory interface time was reduced. This FPGA was synthesized by pASIC 2 SpDE and Synplify-Lite synthesis tool of Quick Logic company. The final simulation for worst cases was successfully performed under a Verilog HDL simulation environment. And the FPGA programmed for an 84 pin PLCC package. Finally, the benchmark was performed to prove that Our FPGA has better performance than DSP(TMS320C32-40MHz) for the sequence logic control of PLC.

  • PDF

Design and application of self tuning fuzzy PI controller (자기동조 퍼지 PI 제어기의 설계와 응용)

  • 이성주;오성권;남의석;황희수;이석진;우광방
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 1991.10a
    • /
    • pp.238-242
    • /
    • 1991
  • This paper presents an approach to self-tuning PI control of dynamic plants, based on fuzzy logic application. A fuzzy logic composed of linguistic conditional statements is employed by defining the relations of input-output variables of the controller. In the synthesis of a fuzzy logic controller, one of the most difficult problem is the selection of linguistic control rules and parameters. To overcome this difficulty, self-tuning fuzzy PI controller (STFPIC) with a hierarchical structure in which the fuzzy PI controller is assigned as the lower level and the rule modification and parameter adjustment as the higher level. The rules and parameters are generated by the adjustment of membership function through performance index(PE). In this paper, the algorithm for of the controller performance is estimated by means of computer simulation.

  • PDF

Automatic STG Derivation with Consideration of Special Properties of STG-Based Asynchronous Logic Synthesis (신호전이그래프에 기반한 비동기식 논리합성의 고유한 특성을 고려한 신호전이그래프의 자동생성)

  • Kim, Eui-Seok;Lee, Jeong-Gun;Lee, Dong-Ik
    • The KIPS Transactions:PartA
    • /
    • v.9A no.3
    • /
    • pp.351-362
    • /
    • 2002
  • Along with an asynchronous finite state machine, in short AFSM, a signal transition graph, in short STG, is one of the most widely used behavioral description languages for asynchronous controllers. Unfortunately, STGs are not user-friendly, and thus it is very unwieldy and time consuming for system designers to conceive and describe manually the behaviors of a number of asynchronous controllers which constitute an asynchronous control unit for a target system in the form of STGs. In this paper, we suggest an automatic STG derivation method through a process-oriented method. Since the suggested method considers special properties of STG-based asynchronous logic synthesis very carefully, asynchronous controllers which are synthesized from STGs derived through the suggested method are superior in aspects of area, synthesis time, performance and implementability compared to those obtained through previous methods.

Implementation of Real-Time Fuzzy Controller for SCARA Type Dual-Arm Robot (스카라형 이중 아암 로봇의 실시간 퍼지제어기 실현)

  • Kim Hong-Rae;Han Sung-Hyun
    • Journal of Institute of Control, Robotics and Systems
    • /
    • v.10 no.12
    • /
    • pp.1223-1232
    • /
    • 2004
  • We present a new technique to the design and real-time implementation of fuzzy control system basedon digital signal processors in order to improve the precision and robustness for system of industrial robot in this paper. The need to meet demanding control requirement in increasingly complex dynamical control systems under significant uncertainties, leads toward design of intelligent manipulation robots. The TMS320C80 is used in implementing real time fuzzy control to provide an enhanced motion control for robot manipulators. In this paper, a Self-Organizing Fuzzy Controller for the industrial robot manipulator with a actuator located at the base is studied. A fuzzy logic composed of linguistic conditional statements is employed by defining the relations of input-output variables of the controller. In the synthesis of a Fuzzy Logic Controller, one of the most difficult problems is the determination of linguistic control rules from the human operators. To overcome this difficult Self-Organizing Fuzzy Controller is proposed for a hierarchical control structure consisting of basic and high levels that modify control rules. The proposed Self-Organizing Fuzzy Controller scheme is simple in structure, fast in computation, and suitable for implementation of real-time control. Performance of the SOFC is illustrated by simulation and experimental results for a Dual-Arm robot with eight joints.