• Title/Summary/Keyword: Compliant control

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Kinestatic Control using Six-axis Parallel-type Compliant Device (6축 병렬형 순응기구를 이용한 위치/힘 동시제어)

  • Kim, Han Sung
    • Journal of the Korean Society of Manufacturing Technology Engineers
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    • v.23 no.5
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    • pp.421-427
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    • 2014
  • In this paper, the kinestatic control algorithm using a six-axis compliant device is presented. Unlike the traditional control methods using a force/torque sensor with very limited compliance, this method employs a compliant device to provide sufficient compliance between an industrial robot and a rigid environment. This kinestatic control method is used to simply control the position of an industrial robot with twists of compensation, which can be decomposed into twists of compliance and twists of freedom. A simple design method of a six-axis parallel-type compliant device with a diagonal stiffness matrix is presented. A compliant device prototype and kinestatic control hardware system and programming were developed. The effectiveness of the kinestatic control algorithm was verified through two kinds of kinestatic control experiments.

Energy Efficient Locomotion Control of Compliant Legged Robot (유연 다리 구조를 가진 로봇의 에너지 효율적 주행 제어)

  • Kwon, Oh-Seok;Choi, Rock-Hyun;Lee, Dong-Ha
    • The Journal of Korea Robotics Society
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    • v.7 no.2
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    • pp.76-82
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    • 2012
  • In this study, we aim to develop energy efficient walking and running robot with compliant leg. So, we propose the energy efficient locomotion control method. And, we experiment the proposed control method applying to the experimental robot with compliant leg. From the experiment, we look at whether the proposed control method can the robot walk and run energy efficiently.

Adaptive compliant control for scara manipulator

  • Yee, Yanghyi;Ka, Minho;Kim, Sungwoo;Park, Mignon;Lee, Sangbae
    • 제어로봇시스템학회:학술대회논문집
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    • 1990.10b
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    • pp.1322-1326
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    • 1990
  • In this paper, compliant motion control of a manipualator in manipulator is proposed by using the self-tuning adaptive controller. Compliant motion is needed in order to applicated to complicated and accurate fields such as assembly operation in which several parts are matched. For a control method of compliant motion hybrid control is used so forces and position control are proposed selectively through a closed feedback loop. By contacting with environment, the uncertainties higher. Self-tuning controller which adapts to variable dynamic response is applied to compliant motion control in order to satisfy the desired operation. The applicability of the suggested algorithm was confirmed by simulation of the contour tracking task of four joint manipulator.

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Kinestatic Control using a Compliant Device by Fuzzy Logic (퍼지 논리에 의한 순응기구의 위치/힘 동시제어)

  • Seo, Jeong-Wook;Choi, Yong-Je
    • Proceedings of the KSME Conference
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    • 2004.04a
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    • pp.917-922
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    • 2004
  • As the tasks of robots become more diverse, some complicated tasks have come to require force and position hybrid control. A compliant device can be used to control force and position simultaneously by separating the twist of the robot's end effector from the twist of compliance and freedom by using stiffness mapping of the compliant device. The development of a fuzzy gain scheduling scheme of control for a robot with a compliant device is described in this paper. Fuzzy rules and reasoning are performed on-line to determine the gain of twists based on wrench error and twist error and twist of compliance and twist of freedom ratio. Simulation results demonstrate that better control performance can be achieved in comparison with constant gain control.

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A STUDY ON THE PREVENTIVE HEALTH BEHAVIOR OF COLLEGE STUDENTS (우리나라 일부 대학생의 건강행위에 있어 건강신념과 건강 통제위 성향에 관한 연구)

  • 홍두루미
    • Korean Journal of Health Education and Promotion
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    • v.5 no.2
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    • pp.90-109
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    • 1988
  • This study was carried out to find the influencing factors on the acceptance of vaccination of viral hepatitis type B. Two groups of students, 362 undergraduates of Korea University were surveyed for research. The compliant group was 156 students who were inoculated with viral hepatitis type B shot more than one time. The non-compliant group was 206 students who were not inoculated. The measures used for this study were Multidimensional Health Locus of Control Scales and the one developed by the researcher on the basis of literature review about Health Belief Model. The results of this stuby were as follows. The awareness on health of the compliant group was higher than that of the non-compliant group(t=0.39, P<0.05), And perceived barrier of the compliant group was lower than that of the non-compliant group(t=0.35, P<0.05). But the knowledge about the viral hepatitis type B of the compliant group was lower than that of the non-compliant group(t=2.49, P<0.05). There were no differences between two groups in the perceived susceptibility of the hepatitis and the perceived benifit of the hepatitis vaccination. There was no difference between two groups in terms of the Inner Health Locus of Control (HLOC) and Chance HLOC. On the other hand Powerful-Others HLOC of the compliant group was higher than that of the non-compliant group(t=3.67, P<0.05). 'Parent's advice' was found to be the major answer to the motive of being vaccinated in the compliant group. This explains that the most influencial factor in determining one's health behavior is the parent's opinion. Answers to the question of the reason of not being vaccinated were, 'did not want to bother' and 'did not care yet' in order. As a whole, except for the awareness on health and the perceived barrier of the hepatitis vaccination, this study result shows disagreement with the past investigations on the inter-relationship between one's health belief or Health Locus of Control and the health behavior. The author of this study believes this was due to the limitation in the survey group's particular homogenity.

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A Shared Compliant Control Scheme based on Internal Model Control

  • Ahn, Sung-Ho;Jin, Jae-Hyun;Park, Byung-Suk;Yoon, Ji-Sup
    • 제어로봇시스템학회:학술대회논문집
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    • 2003.10a
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    • pp.1571-1574
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    • 2003
  • A shared compliant control scheme based on IMC is proposed for the position-force force reflecting control system. The controller of the slave manipulator is designed by IMC method for the open loop unstable plant. The compliant control is implemented by first order low pass filter. In the proposed scheme, the slave manipulator well tracks the position of the master manipulator in free space and the compliance of the slave manipulator is autonomously controlled in contact condition. The simulation results show that the excellence of the proposed controller.

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A Study on Compliance Control of a SCARA Robot (스카라 로보르에 대한 순응성 제어에 관한 연구)

  • Yee, Yang-Hee;Do, Mi-Sun;Kim, Sung-Woo;Park, Mig-Non;Lee, Sang-Bae
    • Proceedings of the KIEE Conference
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    • 1990.07a
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    • pp.514-517
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    • 1990
  • In this paper, compliant motion control of a manipualator in manipulator is proposed by using the self-tuning adaptive controller. Compliant motion is needed in order to applicated to complicated and accurate fields such as assembly operation in which several parts are matched. For a control method of compliant motion hybrid control is used so forces and position control are proposed selectively through a closed feedback loop. By contacting with environment, the uncertainties higher. Self-tuning controller which adapts to variable dynamic response is applied to compliant motion control in order to satisfy the desired operation. The applicability of the suggested algorithm was confined by simulation of the contour tracking task of four joint manipulator.

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A Piezo-driven Fine Manipulation System Based on Flexure Hinges for Manipulating Micro Parts (미세 부품 조작을 위한 탄성힌지 기반 압전소자 구동형 초정밀 머니플레이션 시스템)

  • Choi, Kee-Bong;Lee, Jae-Jong;Kim, Gee-Hong;Ko, Kuk-Won
    • Journal of Institute of Control, Robotics and Systems
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    • v.15 no.9
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    • pp.881-886
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    • 2009
  • This paper presents a manipulation system consisting of a coarse/fine XY positioning system and an out-of-plane manipulator. The object of the system is to conduct tine positioning and manipulation of micro parts. The fine stage and the out-of-plane manipulator have compliant mechanisms with flexure hinges, which are driven by stack-type piezoelectric elements. In the fine stage, the compliant mechanism plays the roles of motion guide and displacement amplification. The out-of-plane manipulator contains three piezo-driven compliant mechanisms for large working range and fine resolution. For large displacement, the compliant mechanism is implemented by a two-step displacement amplification mechanism. The compliant mechanisms are manufactured by wire electro-discharge machining for flexure hinges. Experiments demonstrate that the developed system is applicable to a fine positioning and fine manipulation of micro parts.

Force Reflecting and Compliant Control for Heavy-Duty Power Manipulators (고하증 원격조작기의 힘반영 유연성 제어)

  • Ahn, Sung-Ho;Yoon, Ji-Sup;Lee, Sang-Jeong
    • Proceedings of the KIEE Conference
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    • 2000.07d
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    • pp.2907-2909
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    • 2000
  • This paper proposes a force reflecting and compliant control scheme for the heavy-duty power manipulators with high ratio gear reducers at its joints. From the experimental results. it can be seen that the proposed scheme has an excellent compliant force control performance.

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