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차량의 전복 방지 및 조향 안정성 향상을 위한 VDC 시스템의 제어기 개발
유승진(Seungjin Yoo),조준상(Joon-Sang Jo),유승한(Seung-Han You),이교일(Kyo Il Lee) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This paper presents the design of modularized controller for the VDC(Vehicle Dynamics Control). With this design scheme, the controller can be decomposed in the following two parts : vehicle dynamics controller and brake pressure controller. For vehicle dynamics controller, sliding mode controllers are designed that are activated in the order of priority to prevent rollover, excessive body sideslip angle, as well as understeer/oversteer of the vehicle. While, the brake pressure controller is designed to make brake pressures in each wheel track the desired pressures calculated in the vehicle dynamics controller. A feedback controller as well as a brake pressure estimator is designed based on the developed mathematical model for VDC hydraulic system. The results of the HILS(Hardware In the Loop Simulation) show that the roll angle, body sideslip angle and yaw rate responses of the vehicle are improved in the several driving scenarios.
지강훈(Kanghoon Ji),정광영(Kwangyoung Jeong),노기한(Kihwan No),최형진(Hyungjin Choi),김성관(Sung-Gaun Kim) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This paper presents a engine based TCS(Traction Control System) using neural network control methods for wheel slip control. The proposed NNPI(Neural Network PI) controller operates at throttle angle to improve the performance of wheel slip. The NNPI controller consists of multi-hidden layer neural network structure and PI control strategy for self-learning of gain scheduling. Computer Simulation have been performed to verify the proposed NNPI control scheme for vehicle wheel slip control using 17 dof vehicle dynamic model which is implemented in MATLAB Simulink.
ABS/VDC 검증을 위한 RT 모델 기반 EILS 개발
윤영환(Y. H. Yoon),조재설(J. S. Cho),양기영(G. Y. Yang),이용범(Y. B. Lee) 유공압건설기계학회 2019 유공압건설기계학회 학술대회논문집 Vol.2019 No.6
The development of Safety control system [ABS / VDC] can be reduced development cost and time by Simulation Techniques which can pre-verify various requirements and design specifications at the initial development’s stage. Simulation techniques can be classified into MILs, SILs, and HILs. HILs is a technology designed to be developed at the same level as real systems by combining it with real hardware to improve the inaccuracies of pure simulation techniques such as MILs and SILs. However, in the case of commercial vehicles which are having many wheels and axes. So there are limitations in establishing HILs environment for verifying and developing commercial vehicle’s Safety control systems. In this study, we propose a development method to convert actual pneumatic brake system into RT [Real time] model through the Analytical Model. Also, we propose RT-based EILs [ECU In-the Loop Simulation] which provides equivalent environment to HILs by replacing actual hardware with RT model.
전동 통합 샤시를 이용한 2륜 독립구동 차량의 선회성능 향상에 관한 연구
박진현(Jinhyun Park),최정훈(Jeonghun Choi),송현우(Hyeonwoo Song),황성호(Sung-Ho Hwang) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11
In this paper, in an effort to secure based technology to solve performance degradation problem of vehicle’s ride & Handling in independence-driven electric chassis system. To solve this problem, MATLAB/Simulink and Carsim is used to modeling vehicle’s powertrain and complete Ride & Handling Performance evaluation environment each. Ride & Handling performance evaluation environment is completed by co-simulation of two simulation environment. From the simulation results, a torque vectoring control algorithm is verified to improve the vehicle’s ride & handling performance.
가상 차량 튜닝 환경(Car-Vatar)을 위한 차량 제어 시스템이 적용 된 다물체 동역학 기반의 차량 모델 개발
송경훈(Kyunghoon Song),이창욱(Changwook Lee),김웅기(Woonggi Kim),주동철(Dongzhe Zhu),김완구(Wangoo Kim),조희제(Huije Cho) 한국자동차공학회 2016 한국자동차공학회 학술대회 및 전시회 Vol.2016 No.11
Traditional vehicle dynamics model for R&H has not been considering control system. It just designed for analyzing chassis structure"s characteristic. But in these day, a vehicle has lots of special control unit to stabilize its motion. And also design engineers has been trying to apply these control system on the model to get more accurate result compare with experimental one. In order to satisfy the field request, traditional vehicle model choose interfacing method with other software which has control algorithm. But these method requires not only different type software but also engineer"s skill to get more stable result. Purpose of this research is development these control algorithm inside of model not interfacing with others. Four major types of control algorithm such as VDC, ABS, EBD and TCS were introduced inside of Virtual vehicle tuning environment(Car-Vatar) model which provides R&H performance data based on multi-body dynamics analysis. We figure out that our new proposed model makes more reliable result.
차량 자세제어 장치를 위한 ECU in the Loop System 개발
백승환(Seunghwan Baek),박용섭(Yongsub Park),조봉근(Bonggun Cho),전재환(Jaehwan Jeon),정인용(Inyong Jung),김흥섭(Heungsub Kim),송정훈(Jeonghoon Song),부광석(Kwangsuck Boo) 한국자동차공학회 2007 한국자동차공학회 지부 학술대회 논문집 Vol.- No.-
In this research, we have developed a system for ECU in the loop simulation to evaluate the performance of a vehicle dynamics controller which is a kind of active stability control units to control wheel slip and to improve steering stability of a vehicle on the road under rainy and snow conditions by controlling brake pressure and engine torque. To operate the VDC module, wheel speeds, a steering angle, master cylinder pressures, a yaw rate and a lateral acceleration of the vehicle and engine operation conditions are necessary as input information, then the brake pressures of each wheels could be calculated for keeping the vehicle stability in the module. The performance test of the developed system has been done according to JASO rules. We can get satisfied results of the developed ECU HILS through a series of experiments.
오토사 이식을 위한 친환경 제동 시스템의 프로토 소프트웨어 개발
김도군(DoKun Kim),신현성(HyunSung Shin),설용철(Yong Chul Seol),정완교(Wan Kyo Jung) 한국자동차공학회 2019 한국자동차공학회 학술대회 및 전시회 Vol.2019 No.11
The automobile industries is forecasted to struggle for researching and developing green vehicles such as EV(Electric Vehicle),HEV(Hybrid Electric Vehicle), PHEV(Plug-in HEV) and FCEV(Fuel Cell Vehicle). One of advantages with ECOfriendly vehicles is able to use regenerative braking force. It means that it increases energy efficiency with cooperative controls of regenerative braking to reduce the heat loss due to the friction brake. Therefore, Fuel cell brake system needs basically not only conventional brake function but support function for regenerative braking. In addition to, the safety system like a brake system be required more accurate and complicated software for its stability. As a result, the software of ECO-friendly brake system gets heavy and complex. This paper proposed the optimized proto software(SW) for fuel cell brake system. The proto SW’s architecture and compensation designs are proposed to preempt verified application SW and to reduce development duration without AUTOSAR platform. The proposed proto SW based on firmware is verified enough on the rig. Before migration with AUTOSAR platform SW, Application SW is able to be verified and confirmed under the proto SW. As a result, it makes to reduce SW development period because Application SW can be developed in parallel with AUTOSAR platform.
독립구동형 전동 샤시 시스템 주행안전성 평가 시뮬레이터 개발
박진현(Jinhyun Park),최정훈(Jeonghun Choi),왕빈,송현우,황성호(Sung-Ho Hwang) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
In this paper, in an effort to secure based technology to solve performance degradation problem of vehicles ride & Handling in independence-driven electric chassis system. To solve our problem, MATLAB/Simulink and Carsim is used to modeling vehicles powertrain and complete Ride & Handling Performance evaluation environment each. Ride & Handling performance evaluation environment is completed by co-simulation of two simulation environment. Simple control principle of electric chassis system is proposed to develop of vehicle driving control algorithm using developed environment. Also, in an effort to secure based technology to solve performance degradation problem of vehicles ride & Handling by proposing demand yaw rate calculation algorithm of vehicle when turning that can be used in the development of control logic development in the future.