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Force Sensing Resistor를 이용한 인체압력중심 변화 분석
박철(Cheol Park),박신석(Shinsuk Park),김충현(Choong Hyun Kim) 대한전기학회 2014 전기학회논문지 Vol.63 No.12
An experimental investigation of COP(center of pressure) was performed using FSR(force sensing resistor) and force plate. The FSR sensor system is used as effective device to detect the movement of human body in activities of daily living. It has been shown that the FSR provides the trajectories of COP with repeatability and reliability.
이효근,이운순,오유진,박신석,Lee, Hyo Keun,Lee, Woon Soon,Oh, Yoo Jin,Park, ShinSuk 한국군사과학기술학회 2017 한국군사과학기술학회지 Vol.20 No.4
The defense industry has become a global industry, and military technology is actively being traded between countries to increase their military capabilities. The Republic of Korea has been ranked one of the top 10 countries for exports of military technology. To maintain competitive advantages in the global defense industry, it is essential to protect key technologies employed by exported weapon systems. Various techniques have been developed for protection of confidential technologies in weapon systems, and the U.S. DoD has been leading the development of the protection techniques. This paper reviews current anti-tampering techniques that prevent leakage of key technology from weapon exportation or pillage. Based on the protection techniques employed by the U.S. DoD Anti-Tamper Executive Agent, this paper suggests novel design methods for protection of confidential technologies. The proposed design methods were tested on an actual weapon system.
Evaluation of Driving Performance of Wheel Loader in the Framework of Fitts’ Law
박장우(Jang Woo Park),박신석(Shinsuk Park) Korean Society for Precision Engineering 2018 한국정밀공학회지 Vol.35 No.5
This paper proposes a novel method for evaluating the performance of control modalities related to driving a wheel loader, according to the framework of Fitts’ law and the steering law. Fitts’ law is an empirical model for the evaluation of human performance. This model is widely used in human factors studies. The steering law is an extension of Fitts’ law, and this law is used especially for evaluating driving performance. To evaluate a driver’s performance, we carried out driving simulations of V-Shaped driving tasks based on ISO 5010 steering requirements. The simulation model of the Doosan DL400 class wheel loader was developed using an Open Dynamics Engine (ODE), and the steering performance of the model was tested with a human subject by using a driving simulator. The steering performance was analyzed with three different parameters: the maximum velocity, the steering ratio, and the friction coefficient. The simulation results show that the steering performance was consistent with both Fitts’ law and the steering law. The completion time was corrected linearly with an index of difficulty, with r2 being between 0.95 and 0.99. These results suggest that the proposed method is feasible for providing a quantitative tool that can be used to design the control modalities of wheel loaders.
손영완(Youngwan Son),다케무라 겐지로(Kenjiro Takemura),박신석(Shinsuk Park) Korean Society for Precision Engineering 2010 한국정밀공학회지 Vol.27 No.4
This study introduces about development of multi-DOF ultrasonic motor that are composed of a bar-shaped stator and a spherical rotor. The ultrasonic motor is a motor which is operated by vibrations over frequency of 20kHz. The multi-DOF ultrasonic motor will be developed by expanding the basic theory of existing 1-DOF ultrasonic motor. It can generate 3-DOF rotation of the rotor around perpendicular axes using 3 vibration modes of stator. By using finite element methods, the optimal dimension of stator is decided and made the components of stator. When we apply the multi-DOF ultrasonic motor composed of rotor and stator to the driving test system, it will be checked whether the motor can be driven at the direction of 3-DOF or not. And it is proposed how the simulation of square bar shaped multi-DOF ultrasonic motor is accomplished.
고중량 파지용 소프트 그리퍼를 활용한 스마트 팜 토마토 수확
강경지(Gyeongji Kang),김성훈(Seonghun Kim),박신석(Shinsuk Park),송가혜(Kahye Song) 대한기계학회 2023 대한기계학회 춘추학술대회 Vol.2023 No.11
This paper introduces an innovative technique for the harvesting of tomatoes through the implementation of a soft robotic gripper. The functionality of this gripper is rooted in a woven structural configuration, resembling a spherical morphology. This design enables a gentle interaction with individual tomatoes, significantly reducing the risk of damage. This achievement is facilitated by the strategic integration of flexible materials, endowing the gripper with an exceptional adaptability to a wide spectrum of tomato sizes and shapes. The amalgamation of this soft gripping technology holds immense promise in revolutionizing harvesting efficiency, all while preserving the integrity of the tomato. Notably, this configuration shows a substantial payload capacity(>100㎏) advantage compared to conventional gripper designs, positioning it as a critical technology within the broader domain of harvesting. The assimilation of these advanced soft grippers not only pledges a discernible enhancement in operational efficiency, but also heralds the advent of a transformative framework for multifaceted fruit/vegetable harvesting.
장명수(Myoung-Soo Jang),오경균(Kyung-Geune Oh),김승종(Seung-Jong Kim),박신석(Shinsuk Park) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
In this paper, we introduce a facial robot, Buddy, which can interact with human by eye contact, gaze control, lip sync as well as various facial expressions. Since it was developed for commercialized mobile service robots' head, it should have a small, simple and light structure. And in addition, its product cost should be low enough. Using 14 motors and several sensors such as ultrasonic sensor, web camera, illuminometer and microphone, we built up the system and could show quite a natural human-robot interaction.