센터 콘솔 스위치의 제스처 기능을 위한 보정 방법 개발

조경일(Kyeoungil Cho),조현성(Hyunseong Cho) 한국자동차공학회 2016 한국자동차공학회 학술대회 및 전시회 Vol.2016 No.11

We suggest calibration algorithm for gesture function that multimedia system uses control function via input control device. Many global OEMs trying to apply gesture because it’s more convenient and safer while a driver is concentrate with driving. But there are a few problems about high costs, mass-product, and malfunction. Generally the methods of gesture technology are image processing using camera, infrared rays, etc. Above all, we are developing cost-efficient IR method that malfunction is come from IR rank and optical lens differences. Best solution is using just same part of semiconductor and mechanical size but it’s not simple. To resolve and minimalize this problem, we tried to apply linear interpolation then IR input data is enhanced and more accurate. Here are our suggestions and test results.

압력센서 및 보이스 코일 모터를 이용한 햅틱 조작계 개발

조경일(Kyeoungil Cho),이준환(Joonhwan Lee) 한국자동차공학회 2018 한국자동차공학회 부문종합 학술대회 Vol.2018 No.6

Consumer trends in the automobile market are shifting from rationality between price and performance to emotional consumption centered on individuality and differentiation. In an operating system used to use various convenience devices in a car, operation force, operation noise, repulsive force, etc. have an influence on the emotion of the consumer. Therefore, the automobile company manages it by quality. However, since the existing operating system is designed mainly for the mechanism parts for each function, We have found improvements such as the fact that the sensitivity specifications are fixed as one, and it is difficult to reflect the changed contents immediately. Therefore, in order to overcome the limitations described above, we designed the new type of controller which consist of the pressure sensor, and voice coil motor. Then, by applying the haptic technique to the controller above, A feeling of quality such as operation force and operation noise, and a feeling of operating the switch can be changed.

스티어링 휠 열선 기능을 위한 PI 제어 알고리즘 개발

조경일(Kyeoungil Cho),조현성(Hyunseong Cho) 한국자동차공학회 2016 한국자동차공학회 부문종합 학술대회 Vol.2016 No.5

We are developing a automotive ECU using PI algorithm for Heated Steering Wheel. It may be varied and complicated in the control method of Heated Steering Wheel function in the future. At start, the control of temperature is simple ON/OFF logic but temperature is hunting. It affects quality of human feeling and function of multi-step temperature control product. In order to prevent from hunting temperature, we decided to apply PI control keeping current temperature after reaching target temperature. We tested continually because PI control needs finding constant value using in software algorithm. Here are our PI control design and tested results for Heated Steering Wheel.

모터 과전류 감지 오차에 대한 개선 방법 연구

조경일(Kyeoungil Cho),안유현(Yuhyeon Ahn) 한국자동차공학회 2018 한국자동차공학회 부문종합 학술대회 Vol.2018 No.6

As the automotive electronics progresses, the number of DC motors that make up parts of automobiles and their role are increasing. Typical applications for DC motors include power windows, power seats, ABS braking systems, electronic power steering, power antennas and power curtains. In order to stably control the DC motor used in these products, it is necessary to check whether the motor is overloaded or faulty. Generally, a specific reference level detection circuit using a comparator is used to check whether the motor is overloaded. However, since the reference level detection circuit is composed of the comparator and the resistors, it is impossible to accurately determine whether the motor is overcurrent due to the resistance error. Therefore, this problem is improved by changing the MCU to determine whether or not the motor is overloaded, rather than a specific reference level detection circuit.

자율주행레벨 발전에 따른 차량내부 인터페이스 발전방향에 관한 고찰

조경일(Kyeoungil Cho),이준환(Joonhwan Lee) 한국자동차공학회 2020 한국자동차공학회 부문종합 학술대회 Vol.2020 No.7

In the future, it will be a confirmed future that everyone is expecting that a higher level of autonomous driving technology will be applied to vehicles that are easily accessible by the general public. However, as autonomous driving technology is spread to general vehicles, opinions remain divided and uncertainty is difficult to predict as to how devices installed in existing vehicles will develop. Obviously, the application of a higher level of autonomous driving technology to a general vehicle is not simply a concept of adding new functions that were not found in existing vehicles. Some functions were present in existing vehicle systems but may be deleted, repurposed, repositioned, or integrated into other modules. In this paper, as the level of autonomous driving technology applied to a vehicle gradually develops, the contents of the vehicles internal interface will be discussed. In more detail, this issue will be analyzed from two viewpoints, interface change according to driving intervention level of the autonomous driving system and expected issues and solutions in the application of the autonomous driving system. And in the conclusion section, we will propose the virtual vehicle interior interface by reflecting the insights obtained through the analysis. In order to unambiguously study this study and to study it more densely, I would like to conclude by defining the limited research scope as follows. First of all, the main subject interested in this study is the driver. Therefore, the vehicle interface to be studied is limited to devices in a region of interest to the driver. Next, autonomous driving technology of level 4 or higher that does not require driver intervention was not considered. Accordingly, the driver must intervene in the driving of the vehicle frequently or intermittently. Lastly, factors such as the drivers recognition ability, driving ability, and operational proficiency of the driver were limited to those skilled in the degree of being able to use the vehicles infotainment system intermittently while driving.

Time Trigger방식의 소프트웨어 아키텍처

조경일(Kyeoungil Cho) 한국자동차공학회 2015 한국자동차공학회 학술대회 및 전시회 Vol.2015 No.11

This is a description time triggered software architecture basically most programmers use structure like this. Most of the written code with the ANSI C was considered to be portable (portability) of the other microprocessor, independent of the processor was written in assembly language. I defined a task as single function unit, a function is composed of a single function or multiple functions.

시간 지연 제어 알고리즘을 이용한 차량용 냉·난방장치의 온도제어기 개발 방법론 제안

조경일(Kyeoungil Cho),이준환(Joonhwan Lee) 한국자동차공학회 2017 한국자동차공학회 학술대회 및 전시회 Vol.2017 No.11

In this paper, the development-method to design the temperature-controller using Time-delay control (TDC) for heat-cooling system mounted on vehicle is proposed. The heat-cooling system mentioned before is one of the convenience device, which is mounted on vehicle to enhance the emotional quality by providing passengers with high-quality temperature condition. But, because of hunting problem in many temperature model, it is challenge to control the temperature-level maintaining the level constant without the closed-loop controller. So, to defeat this problem, Sliding-mode control (SMC) method and conventional Proportional-Integral (PI) control method have been studied until now. This control methods mentioned right before show that temperature model can be controlled without hunting problem. But, in case of SMC, modeling error of control-model is reflected in control error and in case of PI control, there is no mathematical system model. To deal with above problem, we did propose that the TDC method. TDC is one of robust controllers, which is known for precise tracking performance with exceptional robustness without precise mathematical model. Using TDC, we did design the controller to control the heat-cooling system in this paper. To validate the performance, we performed simulation with developed the simulator coded in MATLAB and Simulink. The obtained results from simulation show that the controller using TDC can is enough to yield precise transient performance even if that modeling structure is simple.

본드 선도를 이용한 차량용 햅틱 다이얼 장치의 모델링 방법론에 관한 연구

조경일(Kyeoungil Cho),이준환(Joonhwan Lee) 한국자동차공학회 2017 한국자동차공학회 학술대회 및 전시회 Vol.2017 No.11

In this study, the modeling of a haptic device that carries information tactually to a human being is performed. we propose a simple and intuitive methodology, called Bond-Graph for modeling a haptic device using various methods such as mechanical, electrical, and magnetic fields. Through this work, we can produce the following result; 1. By modeling using bond diagrams, systems with various physical domains can be modeled concisely in a consistent language. 2. Bond diagram can be used to intuitively grasp the flow of the system. 3. Bond diagrams can be used to easily reflect newly added environmental factors or structural changes due to design changes. 4. From the bond-line diagram, a state equation governing the behavior of the system can be derived.

HMI가 주는 자동차의 편안함

조경일(Kyeoungil Cho) 한국자동차공학회 2016 오토저널 Vol.38 No.12

스티어링 휠 진동 경고 기능 개발 방법론 연구

조현성(Hyunseong Cho),조경일(Kyeoungil Cho) 한국자동차공학회 2016 한국자동차공학회 부문종합 학술대회 Vol.2016 No.5

We suggest a design method of Haptic Steering Warning System which is used to smart car or ADAS technology. Until now, this function has simple ON/OFF output logic then a driver is difficult to know what dangerous situation is occur during the driving. At this document, steering wheel outputs various vibration feeling using PC program and reduces system cost since it uses integrated 1 ECU while there were 2 ECUs separately. Also if developers use PC program, they can manage a number of feeling channels conveniently including save or load work. So we introduce the study about these results.