• 제목/요약/키워드: Digital Controller

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마이크로컨트롤러를 이용한 비상발전계통의 제어장치 개발 (Development of Digital controller for emergency power generating system Using Micro-Controller)

  • 정을기;전희종;손진근;나채동;이성범
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2001년도 학술대회 논문집 전문대학교육위원
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    • pp.100-102
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    • 2001
  • This paper resents digital controller of emergency power generator system. The controller offers an integrated alternative for Genset control, metering and remote monitoring. Proposed controller used 80c196kc one chip microprocessor for digital control, it measures parameters of generator and provides output signals to control starting and stopping of generator. Additionally protection and alarm functions are considered to system stability. As almost parts of controller are embedded by digital microprocessor and FPGA techniques, the controller has a more flexible feature and an improvement of precision. The developed system has a big merit economically and is suitable for any kW size generator.

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마이크로 컨트롤러를 이용한 디지털 PPF 제어기의 구현과 실험 (Realization and Experiment of Digital PPF Controller Using Micro-Controller)

  • 김기영;허석;곽문규
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2003년도 춘계학술대회논문집
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    • pp.148-152
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    • 2003
  • This paper is concerned with the digital implementation of the active vibration suppression controller. The digital controllers are often implemented on the DSP board, which is very fast but expensive. There are many low-cost micro-controllers in the market but the feasibility of such micro-controllers for the active vibration suppression has never been conducted. In this study, we selected PIC 16F877 as a proper micro-controller for the digital implementation of the PPF controller. The circuit diagrams are explained in detail. Experimental results show that the low-cost micro-controller can be used as the active vibration controller.

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디지털전관방송을 위한 통합믹서컨트롤러 개발 (Development of Integrated Mixer Controller for Digital Public Address)

  • 조주필;김관웅;김대익
    • 한국인터넷방송통신학회논문지
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    • 제17권1호
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    • pp.19-24
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    • 2017
  • 최근 IT기술의 발전을 근간으로 PA시스템에 IT기술이 접목된 혁신적인 제품들이 개발되고 있다. 본 논문에서는 디지털 전관방송을 위한 통합 믹서 컨트롤러를 제안하였다. 기존 디지털 전관방송을 구성하는 디지털믹서와 디지털 통합 컨트롤러의 기능을 포함한 통합믹서컨트롤러를 개발하였다. 개발된 통합믹서컨트롤러는 16개의 오디오입력채널과 8개의 출력채널을 가진 다채널 믹서 기능을 가진다. 그리고, 디지털오디오신호를 처리하기 위한 EQ, Matrix, Limiter을 가지고 있다. 또한, 개발된 컨트롤러는 믹서의 동작상태 모니터링과 전체 PA시스템을 제어하기 위한 인터넷 연결기능을 가진다.

디지털신호처리 칩과 마이크로 컨트롤러를 이용한 자동 조정 양변위 되먹임 제어기의 구현 (Implementation of Auto-tuning Positive Position Feedback Controller Using DSP Chip and Microcontroller)

  • 곽문규;김기영;방세윤
    • 한국소음진동공학회논문집
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    • 제15권8호
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    • pp.954-961
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    • 2005
  • This paper is concerned with the implementation of auto-tuning positive position feedback controller using a digital signal processor and microcontroller. The main advantage of the positive position feedback controller is that it can control a natural mode of interest by tuning the filter frequency of the positive position feedback controller to the natural frequency of the target mode. However, the positive position feedback controller loses its advantage when mistuned. In this paper, the fast fourier transform algorithm is implemented on the microcontroller whereas the positive position feedback controller is implemented on the digital signal processor. After calculating the frequency which affects the vibrations of structure most, the result is transferred to the digital signal processor. The digital signal processor updates the information on the frequency to be controlled so that it can cope with both internal and external changes. The proposed scheme was installed and tested using a beam equipped with piezoceramic sensor and actuator. The experimental results show that the auto-tuning positive position feedback controller proposed in this paper can suppress vibrations even when the target structure undergoes structural change thus validating the approach.

디지털신호처리 칩과 마이크로 컨트롤러를 이용한 적응 양변위 되먹임 제어기의 구현 (Implementation of Adaptive Positive Popsition Feedback Controller Using DSP chip and Microcontroller)

  • 곽문규;김기영;방세윤
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2005년도 춘계학술대회논문집
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    • pp.498-503
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    • 2005
  • This paper is concerned with the implementation of adaptive positive position feedback controller using a digital signal processor and microcontroller The main advantage of the positive position feedback controller is that it can control a natural mode of interest by tuning the filter frequency of the positive position feedback controller to the natural frequency of the target mode. However, the positive position feedback controller loses its advantage when mistuned. In this paper, the fast fourier transform algorithm is implemented on the microcontroller whereas the positive position feedback controller is implemented on the digital signal processor. After calculating the frequency which affects the vibrations of structure most the result is transferred to the digital signal processor. The digital signal processor updates the information on the frequency to be controlled so that it can cope with both internal and external changes. The proposed scheme was installed and tested using a beam equipped with piezoceramic sensor and actuator. The experimental results show that the adaptive positive position feedback controller proposed in this paper can suppress vibrations even when the target structure undergoes structural change thus validating the approach.

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간편 간접추론방법을 이용한 퍼지 디지털 PI+D 제어기의 설계 (Design of fuzzy digital PI+D controller using simplified indirect inference method)

  • 채창현
    • 제어로봇시스템학회논문지
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    • 제6권1호
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    • pp.35-41
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    • 2000
  • This paper describes the design of fuzzy digital PID controller using a simplified indirect inference method. First, the fuzzy digital PID controller is derived from the conventional continuous-time linear digital PID controller,. Then the fuzzification, control-rule base, and defuzzification using SIM in the design of the fuzzy controller are discussed in detail. The resulting controller is a discrete-time fuzzy version of the conventional PID controller, which has the same linear structure, but are nonlinear functions of the input signals. The proposed controller enhances the self-tuning control capability, particularly when the process to be controlled is nonlinear. When the SIIM is applied the fuzzy inference results can be calculated with splitting fuzzy variables into each action component and are determined as the functional form of corresponding variables. So the proposed method has the capability of the high speed inference and adapting with increasing the number of the fuzzy input variables easily. Computer simulation results have demonstrated that the proposed method provides better control performance than the one proposed by D. Misir et al.

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DSP-Based Digital Controller for Multi-Phase Synchronous Buck Converters

  • Kim, Jung-Hoon;Lim, Jeong-Gyu;Chung, Se-Kyo;Song, Yu-Jin
    • Journal of Power Electronics
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    • 제9권3호
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    • pp.410-417
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    • 2009
  • This paper represents a design and implementation of a digital controller for a multi-phase synchronous buck converter (SBC) using a digital signal processor (DSP). The multi-phase SBC has generally been used for a voltage regulation module (VRM) of a microprocessor because of its high current handling capability at a low output voltage. The VRM requires high control performance of tight output regulation, high slew rate, and load sharing capability of multiple converters. In order to achieve these requirements, the design and implementation of a digital control system for a multi-phase SBC are presented in this paper. The digital PWM generation, current sensing, and voltage and current controller using a DSP TMS320F2812 are considered. The experimental results are provided to show the validity of the implemented digital control system.

마이크로 프로세서를 이용한 최적위치제어에 관한 연구 (A study on optimal position control using a microprocessor)

  • 양주호;하주식
    • Journal of Advanced Marine Engineering and Technology
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    • 제10권1호
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    • pp.51-64
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    • 1986
  • Recently, being due to development of a small microprocessor, microprocessor have found increasing application as a digital controller in the control system. In this paper, authors analyze theoretically the continuous PID controller of a position control system with servomotor, and program the microprocessor as digital PID controller by an assembly language, and search the optimal parameters of the digital PID controller which make the smallest integral square error criterion for a performance criterion, and take experiment the indicial responses with optimal parameter. The results are following. 1) PD- behavior controller was better than P-behavior controller. 2) The smaller the smapling times of P-behavior controller and PD-behavior controller were, the better the indicial responses of the discrete system were. 3) Using a small microprocessor could replace the traditional continuous PID controller for good control.

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Robust Control of DC-DC Converter by Approximate 2DOF Digital Controller Realizing First-Order Model

  • Higuch, Kohji;Takegami, Eiji;Nakano, Kazushi;Tomioka, Satoshi;Watanabe, Kazushi
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 2005년도 ICCAS
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    • pp.794-799
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    • 2005
  • Robust DC-DC converter which can cover extensive load changes and also input voltage changes with one controller is needed. In this paper, we propose a method for determining the parameters of 2DOF digital controller which makes the control bandwidth wider, and at the same time makes a variation of the output voltage very small at sudden changes of resistive load and the input voltage. The 2DOF digital controller whose parameters are determined by the proposed method is actually implemented on a DSP and is connected to a DC-DC converter. Experimental studies demonstrate that this type of digital controller can satisfy given specifications.

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디지털 제어 방식의 고속 PWM 전류 증폭기의 구현에 관한 연구 (Study on the Implementation of the Digital Controller of High-Speed PWM Current Amplifier)

  • 고덕화;백광렬
    • 제어로봇시스템학회논문지
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    • 제8권2호
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    • pp.97-103
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    • 2002
  • This paper deals with a PWM(Pulse Width Modulation) current amplifier using digital controller in order to generate a gradient magnetic field far the MRI(Magnetic Resonance Image) system. Because of tolerance of discrete devices, it is difficult to set accurate values of the control parameters and to make an analog-controlling circuit. However, using digital controller, it is possible to set exact control parameters and to adopt a modern control techniques. It is shown that the digital controller will highly enhance the output current response and it will improve the quality of the MRI.