• Title/Summary/Keyword: Nano control system

Search Result 283, Processing Time 0.032 seconds

Technology Trend on Innovation of Control System by IT-fusion and Implementation of Nano-level Accuracy for Nano Control Systems (제어 시스템의 IT 융합을 통한 성능 향상과 나노 정밀도 구현 기술 동향)

  • Kim C.B.;Kim K.D.
    • Proceedings of the Korean Society of Precision Engineering Conference
    • /
    • 2005.06a
    • /
    • pp.240-245
    • /
    • 2005
  • In order to implement nano-level accuracy of precision equipments, a nano control system is one of the key components. The control system consists of a controller, actuators and sensors having nano-level resolution. In this paper, application area and technical trend on the nano control system are introduced. Some required techniques for realizing nano-level resolution of a controller or actuator are presented. Technical innovation of a control system by IT-fusion and its effect are also described. Finally, domestic research activities for development of the IT-based nano control system are introduced.

  • PDF

3D Bioprinted GelMA/PEGDA Hybrid Scaffold for Establishing an In Vitro Model of Melanoma

  • Duan, Jiahui;Cao, Yanyan;Shen, Zhizhong;Cheng, Yongqiang;Ma, Zhuwei;Wang, Lijing;Zhang, Yating;An, Yuchuan;Sang, Shengbo
    • Journal of Microbiology and Biotechnology
    • /
    • v.32 no.4
    • /
    • pp.531-540
    • /
    • 2022
  • Due to the high incidence of malignant melanoma, the establishment of in vitro models that recapitulate the tumor microenvironment is of great biological and clinical importance for tumor treatment and drug research. In this study, 3D printing technology was used to prepare GelMA/PEGDA composite scaffolds that mimic the microenvironment of human malignant melanoma cell (A375) growth and construct in vitro melanoma micro-models. The GelMA/PEGDA hybrid scaffold was tested by the mechanical property, cell live/dead assay, cell proliferation assay, cytoskeleton staining and drug loading assay. The growth of tumor cells in two- and three-dimensional culture systems and the anti-cancer effect of luteolin were evaluated using the live/dead staining method and the Cell Counting Kit-8 (CCK-8) method. The results showed a high aggregation of tumor cells on the 3D scaffold, which was suitable for long-term culture. Cytoskeleton staining and immunofluorescent protein staining were used to evaluate the degree of differentiation of tumor cells under 2D and 3D culture systems. The results indicated that 3D bioprinted scaffolds were more suitable for tumor cell expansion and differentiation, and the tumor cells were more aggressive. In addition, luteolin was time- and dose-dependent on tumor cells, and tumor cells in the 3D culture system were more resistant to the drug.

Position Sensing for an Electrostatic XY-Stage Using Time-Division Multiplexing (시분할 다중화 기법을 이용한 정전 구동형 XY 스테이지의 위치 검출)

  • Min, Dong-Ki;Jeong, Hee-Moon;Kim, Cheol-Soon;Jeon, Jong-Up
    • Proceedings of the KIEE Conference
    • /
    • 2000.07c
    • /
    • pp.2242-2244
    • /
    • 2000
  • 시분할 다중화 방식을 이용한 정전 구동형 XY 스테이지의 새로운 위치 검출 방법을 제안한다. 각축의 고정자에 90도의 위상차를 가지는 여기(excitation) 신호를 주입하여 스테이지와 연결된 1개의 charge amplifier와 S/H를 이용하여 x축과 y축 방향의 위치를 검출한다. charge amplifier의 파라미터는 DC 이득이 크고 또한 신호간 간섭이 발생하지 않도록 설정한다. 제안된 방법은 XY 스테이지의 디지털 서보 제어기의 구성요소인 S/H를 사용하기 때문에 기존의 방식과는 달리 위치 신호의 검출이 안정적이고 반송 신호에 의한 고조파 왜곡과 복조 과정에서 발생되는 지연을 현저히 줄일 수 있으며 간단하게 구현할 수 있다.

  • PDF

Development and Evaluation of 3-Axis Gyro Sensor based Servo motion control (3-Axis Gyro Sensor based on Servo Motion Control 장치의 성능평가기준 및 시험규격개발)

  • Lee, WonBu;Chang, Chulsoon;Kim, JeongKuk;Park, Soohong
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
    • /
    • 2009.05a
    • /
    • pp.627-630
    • /
    • 2009
  • The combination of the marine use various multi sensor surveillance system technology with the development of servo motion control algorithm and gyro sensor in six freedom motion is implemented to analyze the movement response. The stabilization of the motion control is developed and Nano driving Precision Pan-Tilt/Gimbal system is obtained from the security positioning cameras with ultra high speed device is used to carry out the exact behavior of the device. The exact behavior will be used to make a essential equipment. Finally the development of the Nano Driving Multi Sensor, Nano of Surveillance System Driving Precision Pan-Tilt/Gimbal optimal design and production, 3-aix Gyro Sensor based with Servo Motion Control algorithm development, Image trace video software and hardware tracking the development is organized and discuss in details. The development of the equipment and the system integration are fully experimented and verified.

  • PDF

Manipulation of Single Cell for Separation and Investigation

  • Arai, Fumihito;Ichikawa, Akihiko;Maruyama, Hisataka;Motoo, Kouhei;Fukuda, Toshio
    • International Journal of Control, Automation, and Systems
    • /
    • v.2 no.2
    • /
    • pp.135-143
    • /
    • 2004
  • Recently, high throughput screening for microorganisms with desired characteristics from a large heterogeneous population has become possible. Single cell separation has taken on increasing significance in recent years, and several different methods have been proposed so far. In this paper, we introduce several cell manipulation methods aiming at single cell separation and investigation. At first, methods for the separation of microorganisms are classified. Then, we introduce two different approaches, that is, (1) indirect manipulation using laser trapped microtools and (2) thermal gelation.

Replication of High Density Patterned Media (고밀도 패턴드 미디어 성형에 관한 연구)

  • Lee, Nam-Seok;Choi, Yong;Kang, Shin-Ill
    • Transactions of the Society of Information Storage Systems
    • /
    • v.1 no.2
    • /
    • pp.192-196
    • /
    • 2005
  • In this paper, we investigated the possibility of replicating patterned media by nano-injection molding process with a metallic nano-stamper. The original nano-master was fabricated by E-beam lithography and ICP etching process. The metallic nano-stamper was fabricated using a nanoimprint lithography and nano-electroforming process. The nano-patterned substrate was replicated using a nano-injection molding process without additional etching process. In nano-injection molding process, since the solidified layer, generated during the polymer filling, deteriorates transcribability of nano patterns by preventing the polymer melt from filling the nano cavities, an injection-mold system was constructed to actively control the stamper surface temperature using MEMS heater and sensors. The replicated polymeric patterns using nano-injection molding process were as small as 50 nm in diameter, 150 nm in pitch, and 50 nm in depth. The replicated polymeric patterns can be applied to high density patterned media.

  • PDF

The Measurement of Nano-grating by Scanning Probe Microscopy Using Digital PID Control (Digital PID Control을 적용한 Scanning Probe Microscopy의 Nano-grating 측정)

  • Park, Gyeong-Deok;Ji, Won-Su;Kim, Dae-Chan;Jang, Dong-Hun;O, Beom-Hwan;Park, Se-Geun;Lee, Il-Hang;Lee, Seung-Geol
    • Proceedings of the Optical Society of Korea Conference
    • /
    • 2008.07a
    • /
    • pp.185-186
    • /
    • 2008
  • In this paper, the nano-grating was measured by Scanning Probe Microscopy (SPM) system using digital Proportion, Integration and Derivative (PID) control. Through this measurement, we could confirm the improvement of the vertical resolution compared with analog Proportion and Integration (PI) control method.

  • PDF

Design of Robust Optimal Controller for Nano Stage using Sliding-mode Control (나노 스테이지에 대한 슬라이딩-모드 제어 기반의 강인 최적 제어기 설계)

  • Choi, In-Sung;Choi, Seung-Ok;You, Kwan-Ho
    • Proceedings of the KIEE Conference
    • /
    • 2007.04a
    • /
    • pp.101-103
    • /
    • 2007
  • In this paper. we design a robust optimal controller for ultra-precision positioning system. Generally, it is hard to control the nanometric scale positioning system because of the parameter uncertainties and external disturbances. To solve this problem. we suggest a control algorithm based on the modified sliding-mode control and the LQ control in an augmented system. The augmented system is composed of additional state variables: state estimates and control input in the nominal system. Through comparison with LQ optimal control, it is verified that the proposed control algorithm is more robust to the unexpected parameter variations and external noises.

  • PDF