• 제목/요약/키워드: high speed/accuracy motion

검색결과 101건 처리시간 0.034초

고속주축의 회전정밀도 성능평가에 관한 연구 (A Sudy on the Ealuation of Rtational Acuracy of Hgh Seed Sindle)

  • 김종관;이중기
    • 소음진동
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    • 제5권4호
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    • pp.483-492
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    • 1995
  • For evaluation of rotational accuracy performance of high speed machine tool spindle system, the characteristics of main spindle and tool motion behavior are presented by means of three point accuracy testing method. The results of experiments and analyses are as follows: (1) The high speed spindle rotational accuracy can be evaluated by the combination of the spindle and tool motion behavior. (2) The spindle motion behavior increases up to more that 4 times the tool motion behavior. (3) For the influence of oil viscosity on spindle and tool taper application, 32 cSt of oil viscosity showed the most satisfactory result for rotational accuracy. (4) In order to improve the rotational accuracy of high speed machine tool spindle system, it is needed to reduce the combination error. This can be achieved by improving the working accuracy and supplying the proper lubrication with contact area at the spindle and tool.

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Relationship between motion speed and working accuracy of industrial articulated robot arms

  • Goto, Satoru;Nakamura, Masatoshi;Kyura, Nobuhiro
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 1993년도 한국자동제어학술회의논문집(국제학술편); Seoul National University, Seoul; 20-22 Oct. 1993
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    • pp.230-233
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    • 1993
  • This paper described a relationship between motion speed and working accuracy of industrial articulated robot arms. Working accuracy of the robot arm deteriorates at high speed operation caused by a nonlinear transformation of the kinematics and the time delay of the robot arm dynamic. The deterioration of the following trajectory was expressed as a linear function of the squares of the robot arm motion speed, depending upon a posture of the robot arm and division interval of the objective trajectory.

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고속 주축에 있어서의 예압력 변화가 회전정도에 미치는 영향 (Effect of Preload on Running Accuracy of High Speed Spindle)

  • 송창규;신영재
    • 한국공작기계학회논문집
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    • 제11권2호
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    • pp.65-70
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    • 2002
  • The rotational performance off machine tool spindle has a direct influence upon the surface finish of the finished workpiece. This running accuracy of the spindle is improved by increasing preload on the bearings, while it results in higher temperature rise and larger thermal deformation. Therefore, finding the optimal preload condition for high speed spindle is very important factors in spindle motion. in spindle motion. In this study, the effect of the preload on the roundness accuracy has been examined at the different cutting conditions. Experiments were carried out to investigate the effects of the bearing preload on the running accuracy of high speed spindle which was supported by two angular contact bearings.

공기베어링주축의 고속밀링에서 최전오차의 영향 (Effects on the Rotational Error Motion of Air Bearing Spindle in High Speed Milling)

  • 안선일
    • 한국공작기계학회:학술대회논문집
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    • 한국공작기계학회 1999년도 추계학술대회 논문집 - 한국공작기계학회
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    • pp.227-230
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    • 1999
  • In this paper, the machining characteristics of high speed ball end milling affected by the rotational error of high speed spindle using air bearing are investigated. The error motions of a spindle have generally influenced on the surface roughness, the form accuracy, the tool life, etc. in end milling. Experiments are carried out over a wide range of rotational speeds(10,000-50,000rpm). The rotational errors of the spindle are measured by the gap sensor mounted on the spindle shaft at various cutting speeds. The relations between the surface roughness and the spindle error motion are presented. Results show that the rotational accuracy of the spindle directly affects the surface roughness of the machined surface.

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스트랩다운 관성항법시스템 고속 항법컴퓨터 설계와 구현 (Design St Implementation of a High-Speed Navigation Computer for Strapdown INS)

  • 김광진;최창수;이태규
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 2000년도 제15차 학술회의논문집
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    • pp.29-29
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    • 2000
  • This paper describes the design and implementation of a high-speed navigation computer to achieve precision navigation performance with Strapdown INS. The navigation computer inputs are velocity and angular increment data from the ISA at the signal of the 2404Hz interrupt and performs the removal of gyro block motion and the compensation of high dynamic errors at the 200Hz. For high-speed and high-accuracy, the computer consists of the 68040 micro-processor, 128k Memories, FPGAs, and so on. We show that the computer satisfies the required performance by In-Run navigation tests.

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주행시험을 통한 고속축중기의 융합형 중량환산 알고리즘 효과 분석 (An Analysis of Test Results Using the New Fusion Weight Conversion Algorithm for High-speed Weigh-In-Motion System)

  • 김종우;정영우
    • 한국ITS학회 논문지
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    • 제19권4호
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    • pp.67-80
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    • 2020
  • 고속축중기는 통행 흐름의 통제나 속도의 감속 없이 주행 중인 화물차량의 중량을 실시간 무인 검측하는 시스템으로, 국내에서는 축 조작 행위방지 및 주행 중 과적행위 적발을 위해 주로 고속국도 및 일반국도 본선에 설치하여 이동단속반 검차를 위한 사전선별용으로 활용된다. 본 연구에서는 고속축중기의 중량 측정정확도를 법정 기준까지 향상시키고자 기존 적분형 및 첨두형 중량환산 알고리즘에 대한 분석을 통해 개선사항을 제시하고, 매트타입형 고속축중기에 적용할 수 있는 새로운 융합형 알고리즘을 고안하였다. 이 알고리즘을 적용하여 현장 실차 주행시험을 통한 정확도 향상 효과를 분석한 결과, 최상급의 정확도 등급을 확인할 수 있었다.

갠트리 로봇의 고속/고정밀 이송을 위한 모션분석 및 앞섬필터 설계 (A Study on the Motion Analysis and Lead-Filter Design for High Speed/Accuracy Movement of Gantry Robot)

  • 김진대;조지승;이혁진;신찬배;박철휴
    • 제어로봇시스템학회논문지
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    • 제17권1호
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    • pp.31-37
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    • 2011
  • Recently gantry-type robot with 3 axes rectangular coordinates have been studied in the many industrial production equipment and machinery fields. To acquire a good handling and motion performance of this robot, reducing the settling-time and securing the accurate-transfer positioning under high-speed conditions should be required. However when robot is moved in high-speed, the large inertia of robot can lead to serious vibration of robot's head. The time-delayed control characteristics of this robot can also lead to tracking error. In this research, the analysis of the effects of higher order positional-profile is carried out to assure high-speed performance and stiffness specifications. To remove the residual vibration caused by kinematic coupling effect of dual-servo gantry, we develop a dual-servo gantry of rotary type that moving frame of x-axis rotates about z-axis. In order to decrease the tracking error, the 3 type lead-filter through system identification was applied respectively. From the experimental results, it was shown that zero-order series leader-filter has the best performance about tracking error and settling time.

로봇의 관절외란해석을 이용한 직선궤적 위치결정 (Joint disturbance torque analysis for robots and its application in straight line path placement)

  • 최명환
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 1997년도 한국자동제어학술회의논문집; 한국전력공사 서울연수원; 17-18 Oct. 1997
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    • pp.1824-1827
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    • 1997
  • Majority of industrial robots are controlled by a simple joint servo control of joint actuators. In this type of control, the performance of control is influenced greatly by the joint interaction torques including Coriolis and centrifugal forces, which act as disturbance torques to the control system. As the speed of the robot increases, the effect of this disturbance torque increases, and makes the high speed-high precision control more difficult to achieve. In this paper, the joint disturbance torque of robots is analyzed. The joint disturbance torque is defined using the coefficients of dynamic equation of motion, and for the case of a 2DOF planar robot, the conditions for the maximum joint disturbance torques are identified, and the effect of link parameters and joint variables on the joint disturbance torque are examined. Then, a solutioin to the optimal path placement problem is proposed that minimizes the joint disturbance torque are examined. then, a solution to the optimal path placement problem is proposed that minimizes the joint disturbance torque during a straight line motion. the proposed method is illustrated using computer simulation. the proposed solution method cna be applied to the class of robots that are controlled by independent joint sevo control, which includes the vast majority of industrial robots. By minimizing the joint disturbacne torque during the motion, the simple joint servo controlled robot can move with improved path tracking accuracy at high speed.

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고속 전철 급전기의 접촉 분리를 고려한 동역학적 해석 (Dynamic Analysis of the Pantograph of a High-speed Electrical Train Considering Contact and Separation)

  • 이기수
    • 한국소음진동공학회논문집
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    • 제16권6호
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    • pp.634-642
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    • 2006
  • For the analysis of dynamic contact between a catenary and a pantograph of high-speed electrical train, the numerical solution of the equations of motion of the vehicle pantograph and the catenary system subjected to the contact condition is obtained. The whole equations of motion of the catenary and the pantograph are simultaneously time integrated with the strict application of the contact condition. For the stability of the numerical solution, with the cubic spline interpolation of the catenary displacement, the velocity and acceleration constraints as well as the displacement constraint are imposed on the contact point. Especially it is shown that the Coriolis and centripetal accelerations are critical for the accuracy and stability of the computation.

Linear모터의 위치 제어 성능 시험을 위한 Dynamometer 개발 (Development of a Linear Motor Dynamometer for Positioning Control Performance Test)

  • 노창렬;노명환;김주경;박종진;이응석
    • 대한기계학회논문집A
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    • 제30권5호
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    • pp.609-614
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    • 2006
  • Recently linear motor has been used mainly for high speed feeding performance of machine tools. The advantages of linear motor are not only high speed but high accuracy, because it is not required the coupling and ballscrew for converting rotary to liner motion. Before applying in different moving system, the dynamometer is necessary to test the performance. In Korea, the linear motor is producing in a couple of company However, the liner motor dynamometer is not commercialized yet, like as rotary motor dynamometer. In this paper, a linear motor dynamometer is designed and manufactured using a MR damper. The dynamometer system developed in this study could be used for testing the positioning accuracy fur different loading conditions, traction forces, dynamic performance and so on.