KR102371236B1 - 친환경 차량의 타행 주행 제어 방법 - Google Patents
친환경 차량의 타행 주행 제어 방법 Download PDFInfo
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Abstract
Description
도 1은 친환경 차량의 내리막길 타행주행 상황을 설명하는 도면이다.
도 2는 관련 기술에 따른 내리막길에서 타행 주행 제어 토크를 출력하는 장치를 설명하는 도면이다.
도 3은 본 발명의 실시예에 따른 친환경 차량의 타행 주행 제어 방법을 설명하는 도면이다.
도 4는 본 발명의 실시예에 따른 목표타행거리를 계산하는 거리 계산부를 설명하는 도면(블락 다이어그램(block diagram))이다.
도 5는 본 발명의 실시예에 따른 감속 목표지점의 타행속도 예측 방법을 설명하는 도면이다.
도 6은 본 발명의 실시예에 따른 타행 주행을 위한 제어 토크를 출력하는 토크 출력부를 설명하는 도면이다.
도 7은 본 발명의 다른 실시예에 따른 타행 주행 제어 토크를 출력하는 제어기를 설명하는 도면이다.
도 8은 본 발명의 실시예에 따른 최종 제어 토크를 출력하는 토크 출력 장치를 설명하는 도면이다.
도 9는 도 8에 도시된 조정 인자 출력부를 설명하는 도면(그래프(graph))이다.
도 10은 도 5에 도시된 경사도를 계산(결정)하는 방법의 실시예를 설명하는 도면이다.
도 11은 도 10에 도시된 구간별 경사도 활용을 통한 구간별 타행속도를 예측하는 방법을 설명하는 도면이다.
도 12는 본 발명의 실시예에 따른 친환경 차량의 타행 주행 제어 방법을 설명하는 흐름도(flowchart)이다.
205: 거리 계산부
210: 토크 출력부
212: 조정 인자 출력부
220: 제어기
245: 파워트레인
Claims (9)
- 친환경 차량의 타행 주행 제어 방법에 있어서,
제어기가 감속 이벤트까지의 목표 타행거리 및 상기 감속 이벤트 지점의 경사도에 근거하여 감속 이벤트 지점에서의 상기 친환경 차량의 타행속도를 계산하는 단계;
상기 제어기가 상기 감속 이벤트 지점에서의 상기 친환경 차량의 목표 속도와 상기 계산된 타행속도에 근거하여 상기 친환경 차량의 제어 목표 속도를 계산하는 단계; 및
상기 제어기가 상기 계산된 제어 목표 속도에 근거하여 상기 친환경 차량의 속도를 상기 목표 속도로 조정하는 제어 토크를 상기 친환경 차량의 파워트레인에 출력하도록 제어하는 단계;
를 포함하는 친환경 차량의 타행 주행 제어 방법.
- 제1항에 있어서, 상기 친환경 차량의 타행 주행 제어 방법은,
상기 제어기는 상기 감속 이벤트까지의 잔여거리가 상기 목표 타행거리 이하인 지 여부를 판단하는 단계를 더 포함하며,
상기 잔여거리가 상기 목표 타행거리 이하일 때 상기 친환경 차량의 타행속도를 계산하는 단계가 진행되는 것을 특징으로 하는 친환경 차량의 타행 주행 제어 방법.
- 제1항에 있어서, 상기 친환경 차량의 타행 주행 제어 방법은,
상기 제어기가 상기 거리 계산부가 내비게이션 장치로부터 전송되는 감속 이벤트의 종류 정보, 상기 목표 속도, 및 상기 경사도에 근거하여 상기 목표 타행거리를 계산하도록 제어하는 단계를 더 포함하는 것을 특징으로 하는 친환경 차량의 타행 주행 제어 방법.
- 제1항에 있어서, 상기 제어 토크를 차량의 파워트레인에 출력하도록 제어하는 단계는,
상기 제어기가 토크 출력부가 상기 제어 목표 속도 및 상기 친환경 차량의 현재 속도에 대응하는 제어 토크인 맵 테이블(map table)에 저장된 피드포워드 토크를 출력하도록 제어하는 단계를 포함하는 것을 특징으로 하는 친환경 차량의 타행 주행 제어 방법.
- 제1항에 있어서, 상기 제어 토크를 차량의 파워트레인에 출력하도록 제어하는 단계는,
상기 제어기가 상기 친환경 차량의 현재 속도와 상기 제어 목표 속도 사이의 차이인 차속 차이에 근거하여 상기 제어 토크에 대응하는 피드백 토크를 출력하는 단계를 포함하는 것을 특징으로 하는 친환경 차량의 타행 주행 제어 방법.
- 제1항에 있어서, 상기 제어 토크를 차량의 파워트레인에 출력하도록 제어하는 단계는,
상기 제어기가 토크 출력부가 상기 친환경 차량의 현재 속도와 상기 제어 목표 속도에 대응하는 맵 테이블(map table)에 저장된 피드포워드 토크를 출력하도록 제어하는 단계;
상기 제어기가 상기 현재 속도와 상기 제어 목표 속도 사이의 차이인 차속 차이에 근거하여 상기 제어 목표 속도에 대응하는 피드백 토크를 출력하는 단계;
상기 제어기가 조정 인자 출력부가 상기 차속 차이와 상기 감속 이벤트까지의 잔여거리에 대응하는 맵 테이블에 저장된 피드포워드 토크의 적용 비율을 조정하도록 제어하는 단계; 및
상기 제어기가 최종 제어토크 출력부가 상기 출력된 피드포워드 토크 및 피드백 토크와, 상기 조정된 적용 비율에 근거하여 상기 제어 토크에 대응하는 최종 제어토크를 계산하도록 제어하고 상기 계산된 최종 제어토크를 상기 파워트레인에 출력하도록 제어하는 단계;
를 포함하는 것을 특징으로 하는 친환경 차량의 타행 주행 제어 방법.
- 제6항에 있어서,
상기 조정 인자 출력부에 의해 출력되고 상기 적용비율을 조정하는 조정 인자는 상기 잔여 거리가 커질수록 그리고 상기 차속 차이가 커질수록 상기 피드포워드 토크의 적용 비율을 증가시키는 것을 특징으로 하는 친환경 차량의 타행 주행 제어 방법.
- 제6항에 있어서,
상기 제어기는 상기 조정 인자 출력부에 의해 출력되고 상기 적용비율을 조정하는 조정 인자에 근거하여 상기 피드백 토크를 출력하기 전에 상기 피드포워드 토크를 출력하도록 제어한 후 상기 피드포워드 토크 및 상기 피드백 토크를 혼합하여 사용하도록 제어한 뒤 상기 감속 이벤트에 대응하는 위치에 상기 차량이 접근할 때 상기 피드백 토크를 출력하도록 제어하는 것을 특징으로 하는 친환경 차량의 타행 주행 제어 방법.
- 제6항에 있어서,
상기 최종 제어토크는 수학식인 α*FF tq. + (1-α)*FB tq.에 의해 계산되고 상기 α는 상기 조정 인자 출력부에 의해 출력되고 상기 적용비율을 조정하는 조정 인자이고 상기 FF tq.는 상기 피드포워드 토크이고 상기 FB tq.는 상기 피드백 토크인 것을 특징으로 하는 친환경 차량의 타행 주행 제어 방법.
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