• 제목/요약/키워드: adaptive algorithm

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LMS ALGORITHM을 이용한 HYBRID CODING (HYBRID CODING USING THE LMS ALGORITHM)

  • 김승윈;이근영
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1987년도 전기.전자공학 학술대회 논문집(II)
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    • pp.1379-1382
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    • 1987
  • IN ADAPTIVE LINEAR PREDICTION, AN ADAPTIVE CAPABILITY IS BUILT INTO THE PROCESSOR SUCH THAT AS THE IMAGE STATISTICS CHANGE, THE PREDICTION FILTER COEFFICIENTS THEMSELVES CHANGE, PRODUCING A NEW FILTER MORE CLOSELY OPTIMIZED TO THE NEW SET OF IMAGES STATISTICS. THE LMS ALGORITHM MAY BE USED TO ADAPT THE COEFFICIENT OF AN ADAPTIVE PREDICTION FILTER FOR IMAGE SOURCE ENCODING. IN THIS PAPER, TWO CODING SYSTEMS USING DPCM AND LMS ALGORITHMS RESPECTIVELY FOR OBTAINING THE FIRST TRANSFORMED COEFFICIENT IN HYBRID CODING ARE COMPARED.

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2축 직접 구동 SCARA 로봇에 대한 적응 견실제어 (Adaptive Robust Control for 2 Aaxis Direct Drive SCARA Robots)

  • 이지형;강철구
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 1993년도 한국자동제어학술회의논문집(국내학술편); Seoul National University, Seoul; 20-22 Oct. 1993
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    • pp.642-647
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    • 1993
  • In general, systems contain uncertain elements in the real world; these may be parameters, constant or varying, that are unknown or imperfectly known. When the uncertainty is assumed to satisfy the matching condition and to be cone-bounded, Y.H. Chen[81 proposed an adaptive robust control algorithm which introduced adaptive scheme for a design parameter into robust deterministic controls. In this paper, the above control algorithm is applied to the position tracking control of 2 DOF direct drive SCARA robots, and simulation and experimental studies are conducted to verify the control algorithm and to evaluate control performance.

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극배치 기법을 이용한 적응제어기에 관한 연구 (Adaptive Controller Based on Pole/zero Assignment)

  • 노대종;서진헌
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1989년도 추계학술대회 논문집 학회본부
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    • pp.383-387
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    • 1989
  • In this paper, an adaptive algorithm for processes with unmeasured deterministic disturbances is presented. This algorithm is simple to synthesize an adaptive controller with desired pole/zero assignment. The internal stability requirement is achieved so that this algorithm can easily handle any minimum or non-minimum phase system. Some simulations are given to show the applicability of this approach.

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Biased PNG for Approximate Target Adaptive Guidance

  • Song chanho;Kim, philsung;Jun byungeul
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 2001년도 ICCAS
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    • pp.141.2-141
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    • 2001
  • An approximate target adaptive guidance algorithm(TAG) is proposed on the basis of the assumption that angular acceleration of missile to target line-of-sight and start time for TAG can be obtained by IR seeker. The algorithm does not use any target state estimator. Instead, it avoids the problem of determining target attitude by using the observation that the missile using LOS rate guidance is nearly on the collision course in the later point of engagement. Computer simulation results show that the proposed algorithm can effectively perform target adaptive guidance.

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적응 제어 방식을 이용한 혈압자동 조절기에 관한 연구 (A Study on the Automatic Pressure Controller Using Adaptive Control Algorithma)

  • 이상훈;김영철;민병구
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 1986년도 한국자동제어학술회의논문집; 한국과학기술대학, 충남; 17-18 Oct. 1986
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    • pp.648-651
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    • 1986
  • Sometimes, there are conditions when rapid control of the hypertension needed such as malignant hypertension, and the preoperative pereparation of the hypertensive patient requiring emergency operation, etc. Using the adaptive control algorithm, the mean arterial pressure reduction is achived rapidly and safely in hypertensive rabbit. Among the adaptive control algorithms the pole assignment self tuning control algorithm is superial to the one step ahead minium variance control algorithm. The convergence time is less than 600 sec, and the standard deviation of experimental data are less than 4 mmHg.

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ALT기법을 이용한 ITO 코팅유리의 결함 검출 기법 개발 (Development of Scratch Detecting Algorithm for ITO Coated Glass using Adaptive Logical Thresholding Method)

  • 김면희;이상룡
    • 한국정밀공학회지
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    • 제20권8호
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    • pp.108-114
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    • 2003
  • This research describes a image-processing technique for the scratch detecting algorithm for ITO coated glass. We use the modified logical thresholding method (called adaptive logical thresholding method) for binarization of gray-scale glass image. This method is useful to the algorithm for detecting the scratch of ITO coated glass automatically without need of any prior information of manual fine-tuning of parameters.

Adaptive Background Subtraction Algorithm with Auto Brightness Control for Consumer-type Cameras

  • Thongkamwitoon T.;Aramvith S.;Chalidabhongse T. H.
    • 방송공학회논문지
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    • 제10권2호
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    • pp.156-165
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    • 2005
  • This paper presents a new auto brighoess control algorithm fur adaptive background subtraction. The algorithm is designed to cope with the problem of auto-brightness adjustment feature of consumer-type cameras. The experimental results show the proposed method improves performance of the classification. This will be beneficial to many computer vision applications in term of reducing the cost of implementation and making them more available to the mass consumer market.

Pipelined Adaptive Adaptive filters Based on Affine Projection Algorithms with Order 2

  • Muneyasu, Mitsuji;Harada, Takeshi;Hinamoto, Takao
    • 대한전자공학회:학술대회논문집
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    • 대한전자공학회 2000년도 ITC-CSCC -1
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    • pp.171-174
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    • 2000
  • This paper proposes a pipelined adaptive filter based on affine projection algorithm with order 2. This filter gives a better convergence performance than that of LMS or NLMS pipeline algorithm and has same latency with the pipeline algorithm based on equivalent transformation. Compared to the critical path of the pipeline NLMS implementation, only 2 additions are increased in that of the proposed implementation.

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적응 수렴인자를 갖는 이차원 RLMS에 관한 연구 (A STUDY OF 2-D RECURSIVE LMS WITH ADAPTIVE CONVERGENCE FACTOR)

  • 정영식
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1995년도 하계학술대회 논문집 B
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    • pp.941-943
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    • 1995
  • The convergence of adaptive algorithm depends mainly on the proper choice of the design factor called the covergence factor. In the paper, an optimal convergence factor involved in TRLMS algorithm, which is used to predict the coefficients of the ARMA predictor in ADPCM is presented. It is shown that such an optimal value can be generated by system signals such that the adaptive filter becomes self optimizing in terms of the convergence factor. This algorithm is applied to real image.

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AN ADAPTIVE DISPATCHING ALGORITHM FOR AUTOMATED GUIDED VEHICLES BASED ON AN EVOLUTIONARY PROCESS

  • Hark Hwnag;Kim, Sang-Hwi;Park, Tae-Eun
    • 한국시뮬레이션학회:학술대회논문집
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    • 한국시뮬레이션학회 1997년도 춘계 학술대회 발표집
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    • pp.124-127
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    • 1997
  • A key element in the control of Automated Guided Vehicle Systems (AGVS) is dispatching policy. This paper proposes a new dispatching algorithm for an efficient operation of AGVS. Based on an evolutionary operation, it has an adaptive control capability responding to changes of the system environment. The performance of the algorithm is compared with some well-known dispatching rules in terms of the system throughput through simulation. Sensitivity analysis is carried out varying the buffer capacity and the number of AGVS.

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