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조치훈(Chihoon Jo),황성호(Sungho Hwang),김현수(Hyunsoo Kim) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
In this paper, a clamping force control algorithm is presented along with a consideration of the frictional characteristics and the estimation of the clamping force for a planetary reduction gear type EMB. The frictional model is developed by including the frictional effect of the motor, planetary gear, and screw thread. Since the clamping-force estimation requires the distance of the contact gap between the pad and the disk, an initial gap-distance control algorithm is proposed that uses the gradient change of the motor torque. This paper is concluded with a discussion of the performance of the control algorithm by comparing the simulation results with experimental results.
EMB시스템을 위한 새로운 클램핑력 추정기 설계 및 구현
최진영(JinYeong Choe),기영훈(Young-Hun Ki),전재한(Jae-Han Jeon),이상목(Sang-Mok Lee),안현식(Hyun-Sik Ahn) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
In this paper, a new type of a clamping force estimation algorithm is proposed which utilizes a special polynomial series for the modeling of hysteresis loops during the clamping and the releasing in the Electromechanical Brake system. The proposed estimation algorithm is implemented on the wheel ECU which is designed based on the Infineon TC1797. A cascade type of control architecture is used for the EMB actuator controller and control gains of each controller are selected for the fast and accurate force response performance. It is illustrated by lab tests that the proposed clamping force estimation method yields better performance than existing estimation methods.
칼만 필터 기반의 전동식 브레이크 실시간 클램핑력 추정
현세라(Sera Hyeon),조성선(Sungsun Cho),박기서(Giseo Park) 한국자동차공학회 2023 한국자동차공학회 학술대회 및 전시회 Vol.2023 No.11
The electro-mechanical brake (EMB) is anticipated by research communities and car manufacturers to be the future adopted brake system due to its advantages. However, to be competitively priced, the high cost load cell of EMB, which measures the clamping force to a disk, should be replaced by a clamping force estimation algorithm. First, in order to determine the point of occurrence of the clamping force, an algorithm is developed to estimate the pad contact point, which represents the contact between the pad and the disk. Then, a new Kalman filter for clamping force estimation is proposed in this paper. In particular, the estimation accuracy is improved by considering both friction torque models in the dynamic state and the stationary state. The performance of the proposed estimation algorithm is validated by comparison with the actual clamping force measured by the load cell sensor on the EMB test bench. At this time, through some stage tests including both steady state and transient state, it can be confirmed whether the performance of the proposed estimation algorithm can be maintained for various clamping force references.
EMB의 클램핑력 추정을 위한 옵저버 정량적 평가에 관한 연구
정호영(Hoyoung Jeong),이강석(Kangseok Lee),이우택(Wootaik Lee) 한국자동차공학회 2015 한국자동차공학회 부문종합 학술대회 Vol.2015 No.5
The research of Electro-mechanical Brake(EMB) which is one of typical Brake-by-Wire system, has been progressed recently because of the of the advantage by regenerative braking and precise controllability. The EMB make the movement of the brake pad by rotation motor, and the clamping force is generated by contact between the brake pad and disk. Additional sensors are required for measuring of the clamping force of EMB, which causes the increase of cost and effort to install the sensors. In this paper, the Luenberger observer which is one of typical linear state estimator and the sliding mode observer are designed Designed state estimators are evaluated quantitatively by mutual comparison on the test bench. It can be possible to estimate the clamping force of EMB without additional sensors by designed Luenberger and sliding mode observer
마찰력과 강성을 고려한 사출성형기 5절 토글 링크에 관한 연구
최주용 한국기계기술학회 2014 한국기계기술학회지 Vol.16 No.5
In this paper, the 5 joint toggle link of a injection molding machine is analyzed. Considering toggle link kinematics and frictions at the pin joints, clamping forces for each cross head position are calculated. The maximum clamping force and the install position of a tail-stock are determined by the stiffness of links, plates and tie-bar. The kinematic results of a finite element analysis considering friction and stiffness are compared with measured results.