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1.发明授权公开(公告)号：US07786687B2
公开(公告)日：2010-08-31
申请号：US12109676
申请日：2008-04-25
申请人： Chandra S. Namuduri , Suresh Gopalakrishnan , Robert R. Bolio , Ross Feller , Balarama V. Murty
发明人： Chandra S. Namuduri , Suresh Gopalakrishnan , Robert R. Bolio , Ross Feller , Balarama V. Murty
CPC分类号： B62D5/046
摘要： A motor control strategy for a motor in a front steering system for a vehicle that reduces vibrations from the motor being transferred to a vehicle hand-wheel. The control strategy also includes operating the electric motor in a commutation freeze mode if a position error signal is less than a first predetermined threshold by sending signals to coils of the motor to prevent to the motor from rotating, operating the electric motor in a commutation normal mode if the position error signal is greater than a second predetermined threshold that is greater than the first predetermined threshold, and operating the electric motor in an angle step mode if the position error signal is between an intermediate threshold and the second threshold where the angle step mode provides a signal to the motor to move the motor forward or backward a predetermined number of motor steps, one step at a time.
摘要翻译： 一种用于车辆的前转向系统中的电动机的电动机控制策略，其减少被传递到车辆手轮的电动机的振动。 控制策略还包括如果位置误差信号小于第一预定阈值，则通过向马达的线圈发送信号以防止马达旋转，以换向正常方式操作电动机，以换相冻结模式操作电动机 模式，如果位置误差信号大于大于第一预定阈值的第二预定阈值，并且如果位置误差信号在中间阈值和第二阈值之间，角度步长模式下操作电动机，其中角度步 模式向马达提供信号以使电机向前或向后移动预定数量的马达步骤，一次一步。
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2.发明授权公开(公告)号：US07877179B2
公开(公告)日：2011-01-25
申请号：US11530976
申请日：2006-09-12
IPC分类号： A01B69/00
摘要： A system as described herein relates generally to automotive active front steering control systems having a main processor and a redundant sub-processor. The system provides a way of controlling the electrical and mechanical locking of an actuator motor in a variable gear ratio active front steering system. The method enables the sub-processor to electrically lock the active front steer actuator motor via the main processor to reduce mechanical wear or damage to the variable gear ratio system if the main processor is unable to electrically lock the actuator motor before it mechanically locks the actuator motor. The system also provides an error detecting technique that is robust to false failures and allows the active front steering system to safely transition into a fail safe mode if an error occurs.
摘要翻译： 本文所述的系统一般涉及具有主处理器和冗余子处理器的汽车主动前转向控制系统。 该系统提供了一种控制可变齿轮比主动前转向系统中的致动器电动机的电气和机械锁定的方式。 该方法使得副处理器能够经由主处理器电动锁定主动前转向执行器电动机以减少机械磨损或损坏可变变速比系统，如果主处理器在机械地锁定致动器之前不能电致锁定致动器电动机 发动机。 该系统还提供了对错误故障稳健的错误检测技术，并允许主动前导向系统在发生错误时安全地转换到故障安全模式。
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3.发明申请公开(公告)号：US20090269043A1
公开(公告)日：2009-10-29
申请号：US12109676
申请日：2008-04-25
申请人： Chandra S. Namuduri , Suresh Gopalakrishnan , Robert R. Bolio , Ross Feller , Balarama V. Murty
发明人： Chandra S. Namuduri , Suresh Gopalakrishnan , Robert R. Bolio , Ross Feller , Balarama V. Murty
IPC分类号： H02P7/29
CPC分类号： B62D5/046
摘要： A motor control strategy for a motor in a front steering system for a vehicle that reduces vibrations from the motor being transferred to a vehicle hand-wheel. The control strategy also includes operating the electric motor in a commutation freeze mode if a position error signal is less than a first predetermined threshold by sending signals to coils of the motor to prevent to the motor from rotating, operating the electric motor in a commutation normal mode if the position error signal is greater than a second predetermined threshold that is greater than the first predetermined threshold, and operating the electric motor in an angle step mode if the position error signal is between an intermediate threshold and the second threshold where the angle step mode provides a signal to the motor to move the motor forward or backward a predetermined number of motor steps, one step at a time.
摘要翻译： 一种用于车辆的前转向系统中的电动机的电动机控制策略，其减少被传递到车辆手轮的电动机的振动。 控制策略还包括如果位置误差信号小于第一预定阈值，则通过向马达的线圈发送信号以防止马达旋转，以换向正常方式操作电动机，以换相冻结模式操作电动机 模式，如果位置误差信号大于大于第一预定阈值的第二预定阈值，并且如果位置误差信号在中间阈值和第二阈值之间，角度步长模式下操作电动机，其中角度步 模式向马达提供信号以使电机向前或向后移动预定数量的马达步骤，一次一步。
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公开(公告)号：US07493201B2
公开(公告)日：2009-02-17
申请号：US10978982
申请日：2004-11-01
IPC分类号： G06F19/00
CPC分类号： B62D6/003
摘要： An active front wheel steering control system for a vehicle that includes a first control sub-system that provides AFS oversteer control to control the angle of the front wheels during an oversteer condition, and a second control sub-system that provides AFS understeer control to control the angle of the front wheels during an understeer condition. A controller monitors a first parameter as an oversteer flag associated with the first control sub-system and a second parameter as an understeer flag associated with the second control sub-system.
摘要翻译： 一种用于车辆的主动前轮转向控制系统，其包括提供AFS过度转向控制以在过度转向状态期间控制前轮的角度的第一控制子系统以及提供AFS转向不足控制以控制的第二控制子系统 在转向不足的情况下前轮的角度。 控制器将第一参数监视为与第一控制子系统相关联的过度转向标志，第二参数作为与第二控制子系统相关联的不足转向标志。
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公开(公告)号：US20080306654A1
公开(公告)日：2008-12-11
申请号：US11759395
申请日：2007-06-07
摘要： A vehicle parametric active front steering (AFS) system remedial action is described herein. AFS system modules inter-communicate via messages containing parameters. The AFS system detects a message error, determines an invalid parameter, and takes appropriate remedial action. An error is detected if an error condition is satisfied or if occurrence of incorrect messages reaches or exceeds a certain predetermined frequency. The AFS system takes the remedial action by setting default values of valid parameters corresponding to the invalid parameter.
摘要翻译： 本文描述了车辆参数主动前转向（AFS）系统补救动作。 AFS系统模块通过包含参数的消息进行通信。 AFS系统检测到消息错误，确定无效参数，并采取适当的补救措施。 如果满足错误条件或者错误消息的发生达到或超过某个预定频率，则检测到错误。 AFS系统通过设置与无效参数对应的有效参数的默认值来采取补救措施。
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公开(公告)号：US20080065292A1
公开(公告)日：2008-03-13
申请号：US11530600
申请日：2006-09-11
IPC分类号： B62D6/00
摘要： A vehicle active front steering (AFS) control system is described herein. The AFS system utilizes variable gear ratio and lead steer control methodologies. The AFS system utilizes independent and supervisory control systems to control the AFS system parameters in accordance with designated security metrics, to lower the time to lock the AFS system angle actuator in the event the security metrics are not met, and to lower likelihood of fault detection errors by checking a difference between a target road wheel angle and an actual road wheel angle obtained from a first control path and, for added security, by checking a difference between the target road wheel angle and the actual road wheel angle from a second control path, as a function of the vehicle velocity. The techniques described herein may check a value of an AFS control parameter from the first control path to the value of the same AFS control parameter from the second control path.
摘要翻译： 本文描述了车辆主动前转向（AFS）控制系统。 AFS系统采用可变齿轮比和牵引转向控制方法。 AFS系统利用独立和监督控制系统根据指定的安全性度量来控制AFS系统参数，以便在不满足安全性度量的情况下降低锁定AFS系统角度执行器的时间，并降低故障检测的可能性 通过检查从第一控制路径获得的目标车轮角度与实际车轮角度之间的差异，并且为了增加的安全性，通过从第二控制路径检查目标车轮角度与实际车轮角度之间的差异， ，作为车辆速度的函数。 本文描述的技术可以从第一控制路径检查AFS控制参数的值到来自第二控制路径的相同AFS控制参数的值。
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公开(公告)号：US08234042B2
公开(公告)日：2012-07-31
申请号：US12042426
申请日：2008-03-05
IPC分类号： B62D6/08
摘要： A method for controlling a limited by-wire active front steering system includes measuring an input steering angle, determining a tire saturation limit, and comparing the saturation limit to the input angle. A target actuator angle from a steering actuator is limited when the input angle is greater than the saturation limit. A constant value provides a fixed steering gear ratio when the input angle is less than the saturation limit. A limited by-wire steering system for a vehicle includes a steering device, a sensor for measuring an input steering angle, a controller for calculating a first target actuator angle when the input angle is less than a threshold, and a second target actuator angle when the input angle is greater than the threshold. The threshold is a calibrated saturation limit of a road wheel of the vehicle.
摘要翻译： 用于控制有限的有线的有源前转向系统的方法包括测量输入转向角，确定轮胎饱和极限，并将饱和极限与输入角进行比较。 当输入角度大于饱和极限时，来自转向致动器的目标致动器角度受到限制。 当输入角小于饱和极限时，恒定值提供固定的转向齿轮比。 一种用于车辆的有限线性转向系统包括转向装置，用于测量输入转向角的传感器，用于当输入角小于阈值时计算第一目标致动器角度的控制器，以及当输入角小于阈值时的第二目标致动器角度 输入角度大于阈值。 阈值是车辆的车轮的校准饱和极限。
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8.发明授权公开(公告)号：US07634340B2
公开(公告)日：2009-12-15
申请号：US11679202
申请日：2007-02-27
IPC分类号： G06F7/00
CPC分类号： B62D5/008 , B62D5/0457 , B62D5/046 , B62D6/002
摘要： A system and method for secure and restricted transitions between steering control modes for a vehicle with active front steering is disclosed. Possible operating control modes include precision, electric phase locking, and proportional integral derivative (PID) modes. Each operating control mode is monitored and the operational status of the modes are checked before transitioning. For security, the system can prevent transitions from PID to precision control mode and restrict electric phase locking mode to transition only to a mechanical locking mode.
摘要翻译： 公开了一种用于具有主动前转向的车辆的转向控制模式之间的安全和有限转换的系统和方法。 可能的操作控制模式包括精度，电相锁定和比例积分微分（PID）模式。 监控每个操作控制模式，并在转换之前检查模式的运行状态。 为了安全起见，系统可以防止从PID转换到精密控制模式，并限制电相锁定模式仅转换到机械锁定模式。
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公开(公告)号：US07546191B2
公开(公告)日：2009-06-09
申请号：US11017420
申请日：2004-12-20
申请人： William C. Lin , Shih-Ken Chen , Robert R. Bolio
发明人： William C. Lin , Shih-Ken Chen , Robert R. Bolio
摘要： An active front steering (AFS) system that provides hand-wheel damping. The AFS system includes a damping control sub-system that determines a hand-wheel angular velocity based on the rate of change of a hand-wheel angle signal. The damping control sub-system determines the damping control signal by multiplying the angular velocity of the hand-wheel angle signal with a control gain. The damping control signal is added to a steering signal from a variable gear ratio control sub-system to generate a steering command signal. The damping control sub-system sets to the damping control signal to zero if a signal from a vehicle stability enhancement sub-system is activated.
摘要翻译： 提供手轮阻尼的主动前转向（AFS）系统。 AFS系统包括基于手轮角度信号的变化速率确定手轮角速度的阻尼控制子系统。 阻尼控制子系统通过将手轮角度信号的角速度与控制增益相乘来确定阻尼控制信号。 阻尼控制信号被添加到来自可变齿轮比控制子系统的转向信号，以产生转向指令信号。 如果来自车辆稳定性增强子系统的信号被激活，则阻尼控制子系统将阻尼控制信号设置为零。
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10.发明申请公开(公告)号：US20080208410A1
公开(公告)日：2008-08-28
申请号：US11679202
申请日：2007-02-27
IPC分类号： B62D5/04
CPC分类号： B62D5/008 , B62D5/0457 , B62D5/046 , B62D6/002
摘要： A system and method for secure and restricted transitions between steering control modes for a vehicle with active front steering is disclosed. Possible operating control modes include precision, electric phase locking, and proportional integral derivative (PID) modes. Each operating control mode is monitored and the operational status of the modes are checked before transitioning. For security, the system can prevent transitions from PID to precision control mode and restrict electric phase locking mode to transition only to a mechanical locking mode.
摘要翻译： 公开了一种用于具有主动前转向的车辆的转向控制模式之间的安全和有限转换的系统和方法。 可能的操作控制模式包括精度，电相锁定和比例积分微分（PID）模式。 监控每个操作控制模式，并在转换之前检查模式的运行状态。 为了安全起见，系统可以防止从PID转换到精密控制模式，并限制电相锁定模式仅转换到机械锁定模式。
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