• Title/Summary/Keyword: P-tuning

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A 2.4GHz Back-gate Tuned VCO with Digital/Analog Tuning Inputs (디지털/아날로그 입력을 통한 백게이트 튜닝 2.4 GHz VCO 설계)

  • Oh, Beom-Seok;Lee, Dae-Hee;Jung, Wung
    • Proceedings of the Korea Electromagnetic Engineering Society Conference
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    • 2003.11a
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    • pp.234-238
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    • 2003
  • In this work, we have designed a fully integrated 2.4GHz LC-tuned voltage-controlled oscillator (VCO) with multiple tuning inputs for a $0.25-{\mu}m$ standard CMOS Process. The design of voltage-controlled oscillator is based on an LC-resonator with a spiral inductor of octagonal type and pMOS-varactors. Only two metal layer have been used in the designed inductor. The frequency tuning is achieved by using parallel pMOS transistors as varactors and back-gate tuned pMOS transistors in an active region. Coarse tuning is achieved by using 3-bit pMOS-varactors and fine tuning is performed by using back-gate tuned pMOS transistors in the active region. When 3-bit digital and analog inputs are applied to the designed circuits, voltage-controlled oscillator shows the tuning feature of frequency range between 2.3 GHz and 2.64 GHz. At the power supply voltage of 2.5 V, phase noise is -128dBc/Hz at 3MHz offset from the carrier, Total power dissipation is 7.5 mW.

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PID Controller Tuning Rules Using an Inner P Controller (내부 P제어를 이용한 PID 제어기 튜닝규칙)

  • Kim, Dong-Il;Sung, Su-Whan;Lee, Jie-Tae
    • Journal of Institute of Control, Robotics and Systems
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    • v.12 no.12
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    • pp.1173-1177
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    • 2006
  • Using an inner P controller, a tuning rule useful for processes with wide ratios of time delay over time constant is proposed. Internal model control method and pole assignment method are utilized. It can be used for processes with wide range of the ratio of time delay to time constant without incovenience to choose different tuning rules.

Low-Power Wide-Tuning Range Differential LC-tuned VCO Design in Standard CMOS

  • Kim, Jong-Min;Woong Jung
    • Proceedings of the Korea Electromagnetic Engineering Society Conference
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    • 2002.11a
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    • pp.21-24
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    • 2002
  • This paper presents a fully integrated, wide tuning range differential CMOS voltage-controlled oscillator, tuned by pMOS-varactors. VCO utilizing a novel tuning scheme is reported. Both coarse digital tuning and fine analog tuning are achieved using pMOS-varactors. The VCO were implemented in a 0.18-fm standard CMOS process. The VCO tuned from 1.8㎓ to 2.55㎓ through 2-bit digital and analog input. At 1.8V power supply voltage and a total power dissipation of 8mW, the VCO features a phase noise of -126㏈c/㎐ at 3㎒ frequency offset.

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Query Normalization Using P-tuning of Large Pre-trained Language Model (Large Pre-trained Language Model의 P-tuning을 이용한 질의 정규화)

  • Suh, Soo-Bin;In, Soo-Kyo;Park, Jin-Seong;Nam, Kyeong-Min;Kim, Hyeon-Wook;Moon, Ki-Yoon;Hwang, Won-Yo;Kim, Kyung-Duk;Kang, In-Ho
    • Annual Conference on Human and Language Technology
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    • 2021.10a
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    • pp.396-401
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    • 2021
  • 초거대 언어모델를 활용한 퓨샷(few shot) 학습법은 여러 자연어 처리 문제에서 좋은 성능을 보였다. 하지만 데이터를 활용한 추가 학습으로 문제를 추론하는 것이 아니라, 이산적인 공간에서 퓨샷 구성을 통해 문제를 정의하는 방식은 성능 향상에 한계가 존재한다. 이를 해결하기 위해 초거대 언어모델의 모수 전체가 아닌 일부를 추가 학습하거나 다른 신경망을 덧붙여 연속적인 공간에서 추론하는 P-tuning과 같은 데이터 기반 추가 학습 방법들이 등장하였다. 본 논문에서는 문맥에 따른 질의 정규화 문제를 대화형 음성 검색 서비스에 맞게 직접 정의하였고, 초거대 언어모델을 P-tuning으로 추가 학습한 경우 퓨샷 학습법 대비 정확도가 상승함을 보였다.

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Self-Tuning PID Controller Based on PLC

  • Phonphithak, A.;Pannil, P.;Suesut, T.;Masuchun, R.;Julsereewong, P.
    • 제어로봇시스템학회:학술대회논문집
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    • 2004.08a
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    • pp.272-276
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    • 2004
  • The conventional PID (Proportional-Integral-Derivative) control technique is widely used for the process control in many industries since it is simple in structure and provides the good response. Nowadays, this control technique has been developed on the Programmable Logic Controller (PLC) to use for the process control loop. However, using this technique is difficult when tuning the PID parameters ($K_p$, $T_i$ and $T_d$) to achieve the best response. Moreover, trial-and-error procedure along with the operator experiences are required to obtain the best results when tuning the PID controller parameters. This paper proposes the self-tuning PID controller based on PLC for the process control in the industries. The proposed self-tuning PID controller uses the PLC-based PID structures to control the process production. The proposed PID tuning utilizes the PLC to synthesize and analyze controller parameter as well as to tune for appropriate parameters using Dahlin method and extrapolation. Experimental results using a self-tuning PID controller to control temperature of the oven show that the controller developed is capable of controlling the process very effectively and provides a good response.

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A 2.4 ㎓ Back-gate Tuned VCO with Digital/Analog Tuning Inputs (디지털/아날로그 입력을 통해 백게이트 튜닝을 이용한 2.4 ㎓ 전압 제어 발진기의 설계)

  • Oh, Beom-Seok;Hwang, Young-Seung;Chae, Yong-Doo;Lee, Dae-Hee;Jung, Wung
    • Proceedings of the IEEK Conference
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    • 2003.11c
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    • pp.32-36
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    • 2003
  • In this work, we have designed a fully integrated 2.4GHz LC-tuned voltage-controlled oscillator (VCO) with multiple tuning inputs for a 0.25-$\mu\textrm{m}$ standard CMOS process. The design of voltage-controlled oscillator is based on an LC-resonator with a spiral inductor of octagonal type and pMOS-varactors. Only two metal layer have been used in the designed inductor. The frequency tuning is achieved by using parallel pMOS transistors as varactors and back-gate tuned pMOS transistors in an active region. Coarse tuning is achieved by using 3-bit pMOS-varactors and fine tuning is performed by using back-gate tuned pMOS transistors in the active region. When 3-bit digital and analog inputs are applied to the designed circuits, voltage-controlled oscillator shows the tuning feature of frequency range between 2.3 GHz and 2.64 GHz. At the power supply voltage of 2.5 V, phase noise is -128dBc/Hz at 3MHz offset from the carrier. Total power dissipation is 7.5 mW.

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Load Following Control of Pressurized Water Reactor (P.W.R. 원자로의 부하추종제어)

  • Lee, Buhm;Park, Young-Hwan
    • Journal of Institute of Control, Robotics and Systems
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    • v.14 no.3
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    • pp.221-225
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    • 2008
  • This paper presents a self-tuning controller for pressurized water reactor (P.W.R.). This self-tuning controller includes two substantial steps, such as parameter identification and control-law building in each cycle. Extended least square algorithm is used for parameter identification, Kalman filter is used for state estimation, and discrete Riccati equation is used for optimal control. Effectiveness of this algorithm is shown through computer simulation and sensitivity analysis.

Modelling of a pH titration process and design of a self-tuning pH controller (pH 적정공정의 모델링 및 자기동조 제어기 설계)

  • 김우태;이혁희;최태호;이지태
    • 제어로봇시스템학회:학술대회논문집
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    • 1988.10a
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    • pp.476-481
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    • 1988
  • In this paper a pH process of a weak acid with a strong base is modeled into a bilinear form, and a self-tuning pH control algorithm which is robust against initial values of solution and disturbances is presented. The control algorithm employs the recursive least square method for the parameter estimation and the generalised minimum variance criterion as the objective function. The computer simulation shows that the tracking of desired pH values is obtained in satisfactory manner regardless of the initial values chosen for the process.

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Simple Two-Degree of Freedom PID Controllers Tuning Table Based on CDM

  • Benjanarasuth, Taworn;Ngamwiwit, Jongkol;Komine, Noriyuki
    • 제어로봇시스템학회:학술대회논문집
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    • 2004.08a
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    • pp.256-261
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    • 2004
  • This paper presents a simple two-degree of freedom PID tuning table based on the CDM design method. The structure of the control system will be composed of plant, P or PI or PID controller and a pre-filter. The finalized formula can be used based on the experimental test of the plant in the same manner as the Ziegler-Nichols' second method. That is; users just need to find the critical gain and critical period experimentally and the parameters of the P, PI or PID controller with the pre-filter can be obtained by substituting the values of critical gain and critical period in the tuning table. The simulation results of the control systems utilizing the proposed controllers compared with those using the Ziegler-Nichols' second method will also be demonstrated.

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Hybrid Self-Tuning Control of a Single rod Hydraulic Cylinder with Varying Payload (가변 하중을 갖는 편로드 유압 실린더의 합성 자기동조 제어)

  • Kim, M.S.;Kim, J.T.;Han, K.B.
    • Journal of the Korean Society for Precision Engineering
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    • v.14 no.12
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    • pp.174-181
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    • 1997
  • A proposed hybrid self-tuning control scheme for single rod hydraulic cylinder which has varying loads is presented here. An adaptive controller is developed for the system that use feedforward and P feedback control for simultaneous parameter identification and tracking control. Through experimental results, the performance comparison of the hybrid self-tuning controller with a constant gain P contro- ller clearly shows its superior ability in handling load changes in quiescent states.

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