KR102643495B1 - 차량의 액티브 서스펜션 제어방법 - Google Patents
차량의 액티브 서스펜션 제어방법 Download PDFInfo
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- KR102643495B1 KR102643495B1 KR1020190052785A KR20190052785A KR102643495B1 KR 102643495 B1 KR102643495 B1 KR 102643495B1 KR 1020190052785 A KR1020190052785 A KR 1020190052785A KR 20190052785 A KR20190052785 A KR 20190052785A KR 102643495 B1 KR102643495 B1 KR 102643495B1
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- 239000000725 suspension Substances 0.000 title claims description 18
- 238000000034 method Methods 0.000 title claims description 17
- 238000005457 optimization Methods 0.000 claims abstract description 19
- 230000005484 gravity Effects 0.000 claims description 12
- 230000001133 acceleration Effects 0.000 claims description 6
- 238000013016 damping Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
- B60G17/018—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the use of a specific signal treatment or control method
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
- B60G17/0152—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the action on a particular type of suspension unit
- B60G17/0157—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the action on a particular type of suspension unit non-fluid unit, e.g. electric motor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
- B60G2400/05—Attitude
- B60G2400/051—Angle
- B60G2400/0511—Roll angle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
- B60G2400/05—Attitude
- B60G2400/051—Angle
- B60G2400/0512—Pitch angle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
- B60G2400/25—Stroke; Height; Displacement
- B60G2400/252—Stroke; Height; Displacement vertical
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
- B60G2400/60—Load
- B60G2400/63—Location of the center of gravity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2600/00—Indexing codes relating to particular elements, systems or processes used on suspension systems or suspension control systems
- B60G2600/09—Feedback signal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2600/00—Indexing codes relating to particular elements, systems or processes used on suspension systems or suspension control systems
- B60G2600/11—Feedforward signal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2600/00—Indexing codes relating to particular elements, systems or processes used on suspension systems or suspension control systems
- B60G2600/18—Automatic control means
- B60G2600/182—Active control means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
- B60G2800/01—Attitude or posture control
- B60G2800/012—Rolling condition
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
- B60G2800/01—Attitude or posture control
- B60G2800/014—Pitch; Nose dive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
- B60G2800/01—Attitude or posture control
- B60G2800/016—Yawing condition
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
- B60G2800/87—System configuration based on vehicle type or model
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
- Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
Abstract
Description
도 2는 본 발명의 개념을 설명한 블록도,
도 3은 목표롤모멘트를 구하기 위한 1자유도 차량모델을 설명한 도면,
도 4는 목표피치모멘트를 구하기 위한 1자유도 차량모델을 설명한 도면,
도 5는 목표요모멘트를 구하기 위한 1자유도 차량모델을 설명한 도면,
도 6은 차체와 휠 사이에 작용할 4개의 수직력을 3개의 상기 수직매개변수로 치환하는 원리를 설명한 도면,
도 7은 본 발명에 따라 제1감소계수에 의해 목표수직력이 제한되는 것을 설명한 도면,
도 8은 본 발명에 따라 제2감소계수를 적용할 상황을 설명한 도면,
도 9는 본 발명에 따라 제2감소계수를 적용한 상황을 설명한 도면이다.
S20; 최적화단계
S30; 스케일링단계
S40; 구동단계
Claims (9)
- 컨트롤러가 차량의 목표거동을 구현하기 위한 차량의 목표모멘트를 산출하는 모멘트산출단계와;
상기 컨트롤러가 상기 목표모멘트를 구현하기 위하여, 상기 목표모멘트의 추종 에러, 상기 목표모멘트를 구현하기 위한 4개의 수직력의 크기 및 변화율을 최소화하는 4개의 목표수직력을 구하는 최적화단계와;
상기 컨트롤러가 상기 수직력들을 구현하는 액츄에이터의 한계 및 차량 안정성 확보를 위해, 상기 최적화단계에서 구해진 목표수직력들을 제한하는 스케일링단계;
를 포함하여 구성되고,
상기 목표모멘트는 차량의 무게중심에 대한, 목표롤모멘트와 목표피치모멘트 및 목표요모멘트로 구성되고,
상기 모멘트산출단계에서는, 상기 목표롤모멘트와 목표피치모멘트 및 목표요모멘트에 각각에 대한 차량모델로부터 도출된 운동방정식으로부터 모델전달함수를 산출하고, 상기 모델전달함수와 제어목표인 이상적인 피드포워드 제어기 전달함수로부터 피드백 제어기 전달함수를 산출한 후, 상기 피드백 제어기 전달함수에 에러를 곱하여, 상기 목표롤모멘트와 목표피치모멘트 및 목표요모멘트를 구하는 것
을 특징으로 하는 차량의 액티브 서스펜션 제어방법. - 삭제
- 청구항 1에 있어서,
상기 목표롤모멘트에 대한 차량모델로부터 도출된 운동방정식은,
이고, 모델전달함수는,
이며, 이상적인 피드포워드 제어기 전달함수를,
라고 할 때, 상기 피드백 제어기 전달함수는
로 정해지며, 여기서,
: 롤회전관성모멘트
: 롤각
: 등가 댐핑 상수
: 등가 스프링 상수
m: 차량질량
: 횡가속도
: 차량 무게중심 높이
: 목표롤모멘트
: 롤 거동 제어 시상수(튜닝변수)
인 것을 특징으로 하는 차량의 액티브 서스펜션 제어방법. - 청구항 1에 있어서,
상기 목표피치모멘트에 대한 차량모델로부터 도출된 운동방정식은,
이고, 모델전달함수는,
이며, 이상적인 피드포워드 제어기 전달함수를,
라고 할 때, 상기 피드백 제어기 전달함수는,
로 정해지며, 여기서,
: 피치회전관성모멘트
: 피치각
: 등가 댐핑 상수
: 등가 스프링 상수
m: 차량질량
: 차량 종가속도
: 차량 무게중심 높이
: 목표피치모멘트
: 피치 거동 제어 시상수(튜닝변수)
인 것을 특징으로 하는 차량의 액티브 서스펜션 제어방법. - 청구항 1에 있어서,
상기 목표요모멘트에 대한 차량모델로부터 도출된 운동방정식은,
이고, 여기서,
,
,
로 정하면, 모델전달함수는
이며, 이상적인 피드포워드 제어기 전달함수를,
라고 할 때, 피드백 제어기 전달함수는,
로 정해지며, 여기서,
: 횡슬립각
: 요레이트
: 전륜/후륜 타이어 횡강성
: 차속
: 차량질량
: 요회전관성모멘트
: 차량 무게중심에서 전륜/후륜 거리
: 목표요모멘트
: 요 거동 제어 시상수(튜닝변수)
인 것을 특징으로 하는 차량의 액티브 서스펜션 제어방법. - 청구항 1에 있어서,
상기 최적화단계에서는 상기 4개의 수직력을 3개의 수직매개변수로 치환하여, 상기 목표모멘트를 표현한 것을 이용하여 코스트함수를 정의하고;
상기 코스트함수에 대하여 최적화를 수행하여 상기 3개의 수직매개변수에 대한 최적해를 구하며;
상기 3개의 수직매개변수에 대한 최적해를 4개의 수직력으로 변환하여 4개의 목표수직력을 산출하는 것
을 특징으로 하는 차량의 액티브 서스펜션 제어방법. - 청구항 1에 있어서,
상기 스케일링단계에서는 상기 목표수직력이 액츄에이터의 한계를 넘는 것으로 판단되면, 상기 목표수직력에 소정의 제1감소계수를 곱하여 상기 목표수직력을 감소시키는 것
을 특징으로 하는 차량의 액티브 서스펜션 제어방법. - 청구항 7에 있어서,
상기 스케일링단계에서는 상기 목표수직력이 추가되면 차량의 휠에 작용하는 수직력이 차량의 안정성 확보를 위해 설정된 수준 이상이 될 것으로 판단되면, 상기 목표수직력에 소정의 제2감소계수를 곱하여 상기 목표수직력을 감소시키는 것
을 특징으로 하는 차량의 액티브 서스펜션 제어방법. - 청구항 1에 있어서,
상기 스케일링단계 이후, 상기 컨트롤러는 상기 목표수직력을 발휘하도록 상기 액츄에이터들을 구동하는 구동단계;
를 더 수행하는 것을 특징으로 하는 차량의 액티브 서스펜션 제어방법.
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Citations (3)
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JP2009006798A (ja) * | 2007-06-27 | 2009-01-15 | Toyota Motor Corp | 車両用サスペンションシステム |
JP2011005906A (ja) | 2009-06-24 | 2011-01-13 | Toyota Motor Corp | 車両用制御装置 |
JP2013126821A (ja) * | 2011-12-19 | 2013-06-27 | Toyota Motor Corp | 車両挙動制御装置 |
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JPH09254624A (ja) * | 1996-03-22 | 1997-09-30 | Toyota Motor Corp | 車輌のショックアブソーバ制御装置 |
DE102008011367A1 (de) | 2007-10-24 | 2009-04-30 | Audi Ag | Radaufhängung für Kraftfahrzeuge |
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JP2009006798A (ja) * | 2007-06-27 | 2009-01-15 | Toyota Motor Corp | 車両用サスペンションシステム |
JP2011005906A (ja) | 2009-06-24 | 2011-01-13 | Toyota Motor Corp | 車両用制御装置 |
JP2013126821A (ja) * | 2011-12-19 | 2013-06-27 | Toyota Motor Corp | 車両挙動制御装置 |
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