[특허]Method for controlling active suspension system on the basis of rotational motion model

Method for controlling active suspension system on the basis of rotational motion model 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B60G-021/00 B60G-017/00
출원번호	US-0563348 (1990-08-07)
우선권정보	JP-0208759 (1989-08-11)
발명자 / 주소	Adachi Masao (Sagamihara JPX) Ozaki Naoyuki (Katsuta JPX) Shioya Makoto (Tokyo JPX)
출원인 / 주소	Hitachi, Ltd. (Tokyo JPX 03)
인용정보	피인용 횟수 : 71 인용 특허 : 0

초록 ▼

In order to cope appropriately with transient changes in the rotational angle of a vehicle body in various traveling states of the vehicle body, the rotational angle of the vehicle body is presumed on the basis of a beforehand stored equation of motion on the vehicle body and a sensed value of an acceleration of the vehicle body and supply of a fluid to suspension cylinders is controlled in accordance with the presumed rotational angle.

대표청구항 ▼

An active suspension control method for controlling a vehicle active suspension system which includes a main tank for storing fluid, and suspension cylinders provided at wheels of the vehicle and connected to said main tank for being supplied with said fluid to control the attitude of the vehicle body, said method comprising the steps of: sensing an acceleration acting on the body of the vehicle which is in a running state; predicting a rotational angle of said vehicle body using a controller by solving a dynamic model equation of rotational motion of the vehicle mathematically according to a value of sensed acceleration and predetermined parameter coefficients of said model equation, said predicted rotational angle being provided as a control signal, wherein the dynamic model equation includes an equation for roll motion of: Inf2+Cnf1+(Kr-MsㆍHrㆍg)f0=MsㆍAyㆍHr . . . where Ir is the roll moment of inertia; f0 is the roll angle; f1 is the roll angular velocity; f2 is the roll angular acceleration; Cr is the roll-equivalent damping coefficient; Kr is the roll stiffness; Ms is the on-sprung weight; Hr is the distance between roll axis centroids; g is the gravitational acceleration; and Ay is the lateral acceleration signal; and further includes the equation for pitch motion of: Ipl2+Cpl1+(Kp-MsㆍHpㆍg)l0=MsㆍAxㆍHp . . . where Ip is the pitch moment of inertia; l0 is the pitch angle; l1 is the pitch angular velocity; l2 is the pitch angular acceleration; Cp is the pitch-equivalent damping coefficient; Kp is the pitch stiffness; Hp is the distance between pitch axis centroids; and Ms is the sprung weight; and controlling the supply of fluid from said main tank to said suspension cylinders according to said control signal representing the predicted rotational angle of the vehicle body, wherein said predicting step includes the steps of detecting at least one roll angle and pitch angle of the vehicle body, and correcting a predicted rotational angle with a signal indicative of the detected angle, and correcting said parameter coefficients IR of the roll motion equation with the actual roll angle and the predicted roll angle, and/or correcting said parameter coefficient Ip of the pitch motion equation with the actual pitch angle and the predicted pitch angle.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

Method for controlling active suspension system on the basis of rotational motion model 원문보기

초록 ▼

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연합인증

Method for controlling active suspension system on the basis of rotational motion model 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

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이 특허를 인용한 특허 (71)

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