CPLD를 이용한 3채널 PWM 신호발생기의 설계

정규홍 대진대학교 생산기술연구소 2000 생산기술연구소 논문집 Vol.3 No.-

In this research, Pulse-Width-Modulation signal generator of which carrier frequency and resolution is superior to the that of conventional peripheral functions of micro-controllers was designed with the combination of digital logic gate and 3-channels of PWM signal generators were implemented with the single Altera's EPM7128S CPLD. We established the model of digital logic circuit and verified its overall function with MAX+PLUS II software which is offered by Altera for digital logic design engineers. From the experiment of PWM signal test on the integrated hydraulic system control board, we can conclude that it works fairly good as we expected and since the speed of PLD is quite fast, there is no parallel-interfacing problem with the host micro-controller. 주요기술용어: Pulse-Width-Modulation(펄스폭 변조), CPLD(고집적 프로그래머블 논리소자)

건설중장비용 카운터샤프트 자동변속기 기어열 레이아웃 설계

정규홍 사단법인 유공압건설기계학회 2009 드라이브·컨트롤 Vol.6 No.3

Counter shaft transmission is a popular automatic transmission power train in construction vehicles such as wheel loader and forklift. The gear train layout of counter shaft transmission is a very basic and important development stage because it affects the most of components design including hydraulic system and shift control algorithm, etc. This paper presents a design methodology for the gear train layout from the analysis of power flow path and clutch hook-up of the existing counter shaft transmission that is adopted in commercialized construction vehicles. Also, independent constraints for the meshed gear ratios are derived in order to realize forward 4-speed and reverse 3-speed gear ratio. The layout design principle proposed here was applied to the new original counter shaft transmission that is underdevelopment.

자동변속기용 압력조절밸브의 성능에 관한 연구

정규홍 대진대학교 1995 大眞論叢 Vol.3 No.-

In recent years, a great deal of research efforts have been made in order to improve shift quality of automatic transmission. Hydraulic control system and TCU (Transmission Control Unit) are recognized as two major parts which have an influence upon transmission performance including shift quality, efficiency, acceleration and so on. Therefore, stability and robustness of the hydraulic control system against flow disturbance are prerequisite to accomplish a high level shift quality. This paper deals with the control performance of the pressure regulator valve in automatic transmission. The effect of variations in operating points and design parameters is investigated in terms of computer simulation for the nonlinear dynamic system.

휠로더 자동변속기용 속도센서 신호처리회로의 설계 및 분석

정규홍 대진대학교 생산기술연구소 1999 생산기술연구소 논문집 Vol.2 No.-

In this work, an appropriate seed signal conditioning circuit is designed on the basis of the characteristics of wheel loader speed sensor output voltage and the each electronic component which are obtained from experiment. We investigant the problems of the previous version of signal conditioning circuit for hall-effect sensors of passenger-car. From the experimental result, we could conclude that the newly designed signal conditioning circuit that is consists of high-pass filter and operational amplifier comparator is adequate for interfacing the wheel loader speed sensors to TCU.

석회석 광산 갱도내 오염물질 난류확산계수에 관한 연구

정규홍,김두영,이승호,안혜림,이창우 한국암반공학회 2013 한국암반공학회 학술대회 및 세미나 자료집 Vol.2013 No.3

IMV 비례 유량제어밸브 정특성 선형해석

정규홍 사단법인 유공압건설기계학회 2019 드라이브·컨트롤 Vol.16 No.4

Recently, as the environmental regulation for earth moving equipment has been tightened, advanced systems using electronic control have been introduced for energy savings. An IMV(Independent Metering Valve), which consists of four 2-way valves, is one of the electro-hydraulic control systems that provides more flexible controllability and potential for energy savings in excavators, when compared to the conventional 4-way spool valve system. To fully realize an IMV, a two-stage bi-directional flow control valve which can regulate the large amount of flow in both directions, should be developed in advance. A simple design that allows proportional flow control to apply the pilot pressure from the current-controlled solenoid to the spring loaded flow control spool and thus valve displacement, is proportional to the solenoid current. However, this open-loop type valve is vulnerable to flow force which directly affects the valve displacement. Force feedback servo of which the position loop is closed by the feedback spring which interconnects the solenoid valve and flow control spool, could compensate for the flow force. In this study, linearity for the solenoid current input and robustness against load pressure disturbance is investigated by linear analysis of the static nonlinear equations for the IMV proportional flow control valve with feedback spring. Gains of the linear system confirm the performance improvement with the feedback spring design.

Siemens 16 비트 마이크로 컨트롤러를 이용한 직류모터 속도제어시스템의 설계

정규홍 대진대학교 생산기술연구소 1998 생산기술연구소 논문집 Vol.1 No.-

In this paper, DC motor speed control system is designed and its control performance is tested with the Siemens C167CR-LM microcontroller which was developed recently. In that speed control system could be realized without much efforts and we can show the effectiveness and validity of the various kinds of control theory from the experiment of that system, it would be one of the good plant to investigate the characteristics of the selected controller and to get acquainted with the specific peripheral functions of the microcontroller. Hence, we explored the major functions of the C167CR microcontroller which are relevant to motor speed control system and implemented the speed detection and PI-control algorithm with the assembly language. From the experiment of the motor speed control system, we could show that many functions of the C167CR microcontroller are very useful, especially PEC in speed detection, and the overall speed control performance is acceptable.

자동변속기의 변속품질 향상을 위한 각가속도 피이드 백 제어 알고리즘

정규홍 대진대학교 1995 大眞論叢 Vol.3 No.-

In this work, the control algorithm in automatic transmission is proposed to improve the shift quality through the feedback of turbine angular acceleration. To design the control system, dynamic behavior of the RAVIGNEAUX type planetary gear system is analyzed both in torque and in inertia phase during gear change, and the relations between output torque and turbine angular acceleration are investigated.

스튜어트 플랫폼 순기구학 해의 실시간 추정기법

정규홍,이교일 대한기계학회 1994 대한기계학회논문집 Vol.18 No.7

The Stewart Platform is a six-degree-of-freedom in-parallel-actuated manipiulator mechanism. The kinematic behavior of parallel mechanisms shows inverse characteristics as compared that of serial mechanisms; i.e, the inverse kinematic problem of Stewart Platform is straightforward, but no closed form solution of the forward kinematic problem has been previously presented. Thus it is difficult to calculate the 6 DOF displacement of the platform from the measured lengths of the six actuators in real time. Here, a real-time estimation algorithm which solves the Stewart Platform kinematic problem is proposed and tested through computer simulations and experiments. The proposed algorithm shows stable convergence characteristics, no estimation errors in steady state and good estimation performance with higher sampling rate. In experiments it is shown that the estimation result is the same as that of simulation even in the presence of measurement noise.

휠로더 자동변속기 시뮬레이터 개발

정규홍,신상호,이승일 사단법인 유공압건설기계학회 2007 드라이브·컨트롤 Vol.4 No.2

TCU is a shift controller for automatic transmission of which major functions are to determine the shift point and manage the shifting process based on the various input signals. As the recent digital control technologies advance, it plays a key-role to improve a transmission performance and its algorithm becomes more complicated. This paper describes the development of transmission simulator for wheel loader that enables a TCU for normal stand-alone operation by the real-time emulation of TCU interface signals. It can be utilized for the analysis of shift control algorithm implemented in a commercial TCU as well as for the development of brand new TCU.