The invention provides a steering angle detection device which can obtain an absolute steering angle even if one of two detection parts which are arranged on a steering angle sensor and detect a relative steering angle fails. When it is determined that the absolute steering angle [theta]f is not output from the absolute steering angle calculation unit (11c), the self-diagnosis unit (21) checks whether the main detection unit (11a) or the sub-detection unit (11b) has failed. The relative steering angle ([theta]p or [theta]s) output from the normal detection unit side and the latest absolute steering angle ([theta]f(n-1)) are added to obtain the current absolute steering angle ([theta]f([theta]f<-[theta]f(n-1)+([theta]p or [theta]s)), and the latest absolute steering angle ([theta]f(n-1)) is updated ([theta]f(n-1)<-[theta]f) by means of the absolute steering angle ([theta]f).
本发明提供一种转向角检测装置,以使得即使在设置于转向角传感器的检测相对转向角的2个检测部中的一个失效的情况下,也能够求出绝对转向角。自我诊断部(21)在判定为未从绝对转向角运算部(11c)输出绝对转向角θf的情况下,检查主检测部(11a)和副检测部(11b)中的哪一个失效,并将从正常的检测部侧输出的相对转向角(θp或θs)与最新的绝对转向角θf(n‑1)相加来求出本次的绝对转向角θf(θf←θf(n‑1)+(θp或θs)),利用该绝对转向角θf对最新的绝对转向角θf(n‑1)进行更新(θf(n‑1)←θf)。
Steering angle detection device
转向角检测装置
2021-11-12
Patent
Elektronische Ressource
Chinesisch
STEERING ANGLE DETECTION DEVICE AND STEERING ANGLE DETECTION METHOD
Europäisches Patentamt | 2017
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