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    • 1. 发明授权
    • Steering control system for wheeled vehicle
    • 轮式车辆转向控制系统
    • US4666013A
    • 1987-05-19
    • US695478
    • 1985-01-28
    • Yasuji ShibahataYukio FukunagaKenji NakamuraYasumasa TsubotaNamio IrieJunsuke Kuroki
    • Yasuji ShibahataYukio FukunagaKenji NakamuraYasumasa TsubotaNamio IrieJunsuke Kuroki
    • B62D6/02B62D6/04B62D7/14B62D7/15B62D5/00
    • B62D7/159B62D7/146B60G2202/32B60G2202/322B60G2206/1116
    • A wheeled vehicle is equipped with a feedforward steering control system which steers the vehicle through front or rear road wheels in accordance with a driver's steering input such as an angular displacement of a steering wheel, and a negative feedback system which senses a turning behavior of the vehicle such as a yaw rate or a lateral acceleration, and steers the vehicle through the front or rear wheels in such a negative direction as to reduce the turning behavior. The feedforward system may control the angular direction of the front or rear wheels in accordance with a linear combination of the steering input and the time derivative of the steering input, or may control the angular directions of both of the front and rear wheels in accordance with different transfer functions between the steering input and the front and rear wheel angles. The negative feedback system is combined with the feedforward system in various ways to provide desired characteristics of the turning behavior. The negative feedback quantity determined by the negative feedback system may be proportional to the sensed turning behavior, or may be determined in accordance with the difference between the sensed turning behavior, and the reference turning behavior calculated from the vehicle speed and steering input.
    • 轮式车辆配备有前馈转向控制系统,其根据驾驶员的转向输入(例如方向盘的角位移)和负反馈系统,通过前车轮或后车轮转向车辆,以及负反馈系统,其感测车轮的转向行为 车辆,例如偏航率或横向加速度,并且以如此减小转弯行为的方向使车辆通过前轮或后轮。 前馈系统可以根据转向输入和转向输入的时间导数的线性组合来控制前轮或后轮的角度方向,或者可以根据转向输入的时间导数来控制前轮和后轮的角度方向 转向输入与前轮和后轮之间的转换功能不同。 负反馈系统与前馈系统以各种方式结合,以提供所需的转向特性。 由负反馈系统确定的负反馈量可以与感测到的转向行为成比例,或者可以根据感测到的转向行为与根据车速和转向输入计算的参考转弯行为之间的差来确定。
    • 8. 发明授权
    • Auxiliary steering system for wheeled vehicle
    • 轮式车辅助转向系统
    • US4878557A
    • 1989-11-07
    • US318470
    • 1989-02-28
    • Yasuji ShibahataYukio FukunagaYasumasa TsubotaTakaaki UnoYuji Okuyama
    • Yasuji ShibahataYukio FukunagaYasumasa TsubotaTakaaki UnoYuji Okuyama
    • B62D6/02B62D6/00B62D6/04B62D7/14B62D7/15B62D101/00B62D111/00B62D113/00G05D1/08
    • G05D1/0891B62D7/159
    • In addition to a conventional steering system for steering a vehicle through the front wheels in accordance with an angular displacement of the steering wheel, the vehicle is equipped with a negative feedback steering control system which steers the vehicle through the front or rear wheels in accordance with an instantaneous yaw rate of the vehicle. The feedback system has a vehicle behavior sensor for sensing the yaw rate, and an control circuit which determines an actual quantity which is equal to the yaw rate or a linear combination of the yaw rate and the time derivative of the yaw rate and a reference quantity which is a function of the angular displacement and the vehicle speed, so designed as to be approximately equal to the yaw rate if there is no disturbance. The control circuit produces a feedback signal proportional to a difference between the actual quantity multiplied by a first coefficient and the reference quantity multipled by a second coefficient. In response to the feedback signal, an actuator corrects the direction of the front or rear wheels in such a direction as to reduce the yaw rate. A lateral acceleration of the vehicle may be used in place of the yaw rate.
    • 除了根据方向盘的角位移通过前轮转向车辆的常规转向系统之外,车辆配备有负反馈转向控制系统,其通过前轮或后轮转向车辆,根据 车辆的瞬时偏航率。 反馈系统具有用于感测偏航率的车辆行为传感器,以及控制电路,其确定等于偏航率的偏航率或偏航率与横摆率的时间导数的线性组合的实际量,以及参考量 其是角位移和车速的函数,如果没有干扰,则被设计为近似等于横摆率。 控制电路产生与实际量乘以第一系数和乘以第二系数的参考量之间的差成比例的反馈信号。 响应于反馈信号,致动器沿着减小横摆率的方向校正前轮或后轮的方向。 可以使用车辆的横向加速度来代替偏航率。