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    • 5. 发明授权
    • Estimation of surface lateral coefficient of friction
    • 表面侧向摩擦系数的估计
    • US08078351B2
    • 2011-12-13
    • US12277027
    • 2008-11-24
    • Flavio NardiJihan RyuNikolai K. MoshchukKevin A. O'Dea
    • Flavio NardiJihan RyuNikolai K. MoshchukKevin A. O'Dea
    • G06F7/00
    • B60T8/172B60T2210/12B60T2230/02
    • A system and method for estimating surface coefficient of friction in a vehicle system. The method includes providing a kinematics relationship between vehicle yaw-rate, vehicle speed, vehicle steering angle and vehicle front and rear axle side-slip angles that is accurate for all surface coefficient of frictions on which the vehicle may be traveling. The method defines a nonlinear function for the front and rear axle side-slip angles relating to front and rear lateral forces and coefficient of friction, and uses the nonlinear function in the kinematics relationship. The method also provides a linear relationship of the front and rear axle side-slip angles and the front and rear lateral forces using the kinematics relationship. The method determines that the vehicle dynamics have become nonlinear using the linear relationship and then estimates the surface coefficient of friction when the vehicle dynamics are nonlinear.
    • 一种用于估计车辆系统中的摩擦力表面系数的系统和方法。 该方法包括提供车辆偏航率,车辆速度,车辆转向角度以及车辆前后侧滑角之间的运动学关系,其对于车辆可能在其上行驶的摩擦的所有表面系数是准确的。 该方法定义了与前后侧向力和摩擦系数有关的前轴和后桥侧滑角的非线性函数,并在运动学关系中使用非线性函数。 该方法还使用运动学关系提供前后轴侧滑角与前后侧向力的线性关系。 该方法通过线性关系确定车辆动力学变为非线性,然后估计当车辆动力学是非线性时的摩擦表面系数。
    • 7. 发明申请
    • SYSTEM FOR ESTIMATING THE LATERAL VELOCITY OF A VEHICLE
    • 估计车辆侧向速度的系统
    • US20110125455A1
    • 2011-05-26
    • US13018671
    • 2011-02-01
    • Flavio NardiJihan RyuNikolai K. MoshchukKevin A. O'Dea
    • Flavio NardiJihan RyuNikolai K. MoshchukKevin A. O'Dea
    • G06F15/00G01P3/00
    • B60T8/172B60T2210/22B60T2230/02B60T2250/04
    • A system and method for estimating vehicle lateral velocity that defines a relationship between front and rear axle lateral forces and front and rear axle side-slip angles. The method includes providing measurements of vehicle yaw-rate, lateral acceleration, longitudinal speed, and steering angle. The method also includes using these measurements to provide a measurement of the front and rear axle forces. The method calculates a front axle lateral velocity and a rear axle lateral velocity, and calculates a front axle side-slip angle based on the rear axle lateral velocity and a rear axle side-slip angle based on the front axle lateral velocity. The method then estimates front and rear axle forces, and selects a virtual lateral velocity that minimizes an error between the estimated and measured lateral axle forces. The method then provides an estimated vehicle lateral velocity using the selected virtual lateral velocity.
    • 一种用于估计车辆横向速度的系统和方法,其限定前后轴向力和前后轴侧滑角之间的关系。 该方法包括提供车辆偏航率,横向加速度,纵向速度和转向角的测量。 该方法还包括使用这些测量来提供前后轴力的测量。 该方法计算前桥横向速度和后桥横向速度,并根据前桥横向速度和基于前桥横向速度的后桥侧滑角计算前轴侧滑角。 然后,该方法估计前轴和后轴力,并且选择使估计和测量的横向轴力之间的误差最小化的虚拟横向速度。 该方法然后使用所选择的虚拟横向速度提供估计的车辆横向速度。
    • 9. 发明申请
    • KINEMATIC ESTIMATOR FOR VEHICLE LATERAL VELOCITY USING FORCE TABLES
    • 使用力表的车辆侧向速度的动力学估计器
    • US20100131144A1
    • 2010-05-27
    • US12276978
    • 2008-11-24
    • Jihan RyuFlavio NardiNikolai K. MoshchukKevin A. O'dea
    • Jihan RyuFlavio NardiNikolai K. MoshchukKevin A. O'dea
    • G06F7/00
    • B60W40/103B60W2520/125B60W2520/14
    • A system and method for estimating vehicle lateral velocity. The method uses a kinematic estimator constructed as a closed-loop Leunberger observer. The kinematic estimator is based on a kinematic relationship between lateral acceleration measurement and rate of change of lateral velocity. The method provides measurement updates based on virtual lateral velocity measurements from front and rear axle lateral force versus axle side-slip angle tables using the lateral acceleration, yaw-rate, longitudinal speed, and steering angle measurements. The method calculates front and rear axle lateral forces from the lateral acceleration and yaw-rate measurements. The method estimates front and rear axle side-slip angles from the calculated front and rear axle lateral forces using the tables. The method calculates multiple virtual lateral velocities from the front and rear side-slip angles and selects one of the virtual lateral velocities that minimizes an error between a measured force and an estimated force as the lateral velocity.
    • 一种用于估计车辆横向速度的系统和方法。 该方法使用构造为闭环Leunberger观测器的运动估计器。 运动学估计器是基于侧向加速度测量与横向速度变化率之间的运动学关系。 该方法使用横向加速度,偏航速率,纵向速度和转向角度测量,基于来自前轴和后桥侧向力与车轴侧滑角表的虚拟侧向速度测量提供测量更新。 该方法从横向加速度和偏航率测量值计算前后轴向力。 该方法从所计算的前轴和后桥侧向力使用表来估计前后轴侧滑角。 该方法从前后侧滑角计算多个虚拟侧向速度,并且选择将被测量的力和估计力之间的误差最小化的虚拟横向速度中的一个作为横向速度。
    • 10. 发明申请
    • DYNAMIC OBSERVER FOR THE ESTIMATION OF VEHICLE LATERAL VELOCITY
    • 用于车辆侧向速度估计的动态观测
    • US20100131229A1
    • 2010-05-27
    • US12276965
    • 2008-11-24
    • Flavio NardiJihan RyuNikolai K. MoshchukKevin A. O'Dea
    • Flavio NardiJihan RyuNikolai K. MoshchukKevin A. O'Dea
    • G01P3/00G06F15/00
    • B60T8/172B60T2210/22B60T2230/02B60T2250/04
    • A system and method for estimating vehicle lateral velocity that defines a relationship between front and rear axle lateral forces and front and rear axle side-slip angles. The method includes providing measurements of vehicle yaw-rate, lateral acceleration, longitudinal speed, and steering angle. The method also includes using these measurements to provide a measurement of the front and rear axle forces. The method calculates a front axle lateral velocity and a rear axle lateral velocity, and calculates a front axle side-slip angle based on the rear axle lateral velocity and a rear axle side-slip angle based on the front axle lateral velocity. The method then estimates front and rear axle forces, and selects a virtual lateral velocity that minimizes an error between the estimated and measured lateral axle forces. The method then provides an estimated vehicle lateral velocity using the selected virtual lateral velocity.
    • 一种用于估计车辆横向速度的系统和方法,其限定前后轴向力和前后轴侧滑角之间的关系。 该方法包括提供车辆偏航率,横向加速度,纵向速度和转向角的测量。 该方法还包括使用这些测量来提供前后轴力的测量。 该方法计算前桥横向速度和后桥横向速度,并根据前桥横向速度和基于前桥横向速度的后桥侧滑角计算前轴侧滑角。 然后,该方法估计前轴和后轴力,并且选择使估计和测量的横向轴力之间的误差最小化的虚拟横向速度。 该方法然后使用所选择的虚拟横向速度提供估计的车辆横向速度。