Electric assist steering system having an improved motor current
controller with notch filter
    1.
    发明授权
    Electric assist steering system having an improved motor current controller with notch filter 失效
    电动助力转向系统具有改进的电机电流控制器和陷波滤波器

    公开(公告)号:US6107767A

    公开(公告)日:2000-08-22

    申请号:US44979

    申请日:1998-03-20

    IPC分类号: B62D5/04 H02P29/00 G05B13/00

    摘要: A motor controller includes a summing circuit (186) for summing a motor current command signal (i.sub.rcmd) with a motor current feedback signal (i.sub.s) and for providing an error current command signal (.DELTA.i.sub.cmd) having a value functionally related to the difference between the motor current command signal and the motor current feedback signal. A notch filter (200) filters the error current command signal and provides a filtered current command signal. The notch filter (200) is adapted to notch out frequencies from the error current command signal about the resonant frequency of a motor (28). A drive circuit (120, 204) energizes the motor (28) in response to the filtered current command signal. A motor current sensor (97) is used for sensing motor current and providing the motor current feedback signal (i.sub.s).

    摘要翻译: 电动机控制器包括用于将电动机电流指令信号(ircmd)与电动机电流反馈信号(α)相加的求和电路(186),并且用于提供具有与功率相关的值的误差电流指令信号(DELTA icmd) 电机电流指令信号和电机电流反馈信号。 陷波滤波器(200)对误差电流指令信号进行滤波并提供滤波电流指令信号。 陷波滤波器(200)适于从误差电流指令信号中消除关于电动机(28)的谐振频率的频率。 驱动电路(120,204)响应于滤波的电流指令信号使电动机(28)通电。 电动机电流传感器(97)用于感测电动机电流并提供电动机电流反馈信号(is)。

    Apparatus and method for controlling an electric motor
    3.
    发明授权
    Apparatus and method for controlling an electric motor 有权
    用于控制电动机的装置和方法

    公开(公告)号:US06448731B1

    公开(公告)日:2002-09-10

    申请号:US09601172

    申请日:2000-07-28

    IPC分类号: G05B400

    摘要: An electric assist steering system (10) includes a torque sensor (16) that provides an applied torque signal (24) indicative of applied steering torque. A motor position sensor (36) provides a motor position signal (40) indicative of the relative position between the rotor and the stator of an AC permanent magnet electric assist motor (22). A first controller (26) controls energization of the electric assist motor and a second controller (54) calculates a DQ vector value in response to applied steering torque and motor position. The second controller (54) also transforms the monitored motor current and position into DQ values. The second controller (54) compares the DQ values responsive to applied steering torque with the DQ value from monitored motor current and position. The electric assist motor (22) is disabled if the comparison indicates inconsistent results.

    摘要翻译: 电动助力转向系统(10)包括转矩传感器(16),其提供指示施加的转向扭矩的施加的扭矩信号(24)。 电动机位置传感器(36)提供表示交流永磁电动辅助电动机(22)的转子和定子之间的相对位置的电动机位置信号(40)。 第一控制器(26)控制电动辅助电动机的通电,第二控制器(54)响应于所施加的转向转矩和电动机位置来计算DQ矢量值。 第二控制器(54)还将监视的电动机电流和位置转换为DQ值。 第二控制器(54)将响应于所提供的转向转矩的DQ值与来自监测的电机电流和位置的DQ值进行比较。 如果比较表明不一致的结果,则电动辅助马达(22)被禁用。

    Method and apparatus for controlling an electric assist steering system
using an adaptive blending torque filter
    4.
    发明授权
    Method and apparatus for controlling an electric assist steering system using an adaptive blending torque filter 失效
    使用自适应混合扭矩滤波器控制电动辅助转向系统的方法和装置

    公开(公告)号:US5504403A

    公开(公告)日:1996-04-02

    申请号:US246947

    申请日:1994-05-20

    CPC分类号: B62D5/0463 B62D6/10

    摘要: A steering assist system (10) providing assist in response to a steering control signal includes a vehicle speed sensor (56) for sensing vehicle speed and for providing a speed signal having a value indicative of the sensed vehicle speed and a torque sensor (44) operatively connected to a vehicle hand wheel (12) for providing a torque signal indicative of applied steering torque. A blending filter (70, 71) is connected to the torque sensor and provides a blended filtered torque signal having a non-linear characteristic at torque frequencies less than a blending frequency and a linear characteristic at torque frequencies greater than the blending frequency. The blending filter establishing the blending frequency at a value functionally related to vehicle speed. Steering assist motor (28) provides steering assist in response to a control signal. The control signal is provided in response to the blended filtered torque signal. The blending filters filtering the torque signal so as to maintain a selectable system bandwidth during system operation.

    摘要翻译: 提供响应于转向控制信号的帮助的转向辅助系统(10)包括:用于感测车辆速度并提供具有指示感测车速的值的速度信号的车速传感器(56)和扭矩传感器(44) 可操作地连接到车辆手轮(12),用于提供指示施加的转向扭矩的扭矩信号。 混合过滤器(70,71)连接到转矩传感器,并且在扭矩频率小于混合频率的扭矩频率和扭矩频率大于混合频率的线性特性下,提供具有非线性特性的混合滤波转矩信号。 混合滤波器将混合频率建立在与车辆速度功能相关的值上。 转向辅助马达(28)响应于控制信号提供转向辅助。 响应于混合滤波的扭矩信号提供控制信号。 混合滤波器过滤扭矩信号,以便在系统操作期间保持可选择的系统带宽。

    Method and apparatus for controlling an electric assist steering system
using two-dimensional interpolation for current commands
    5.
    发明授权
    Method and apparatus for controlling an electric assist steering system using two-dimensional interpolation for current commands 失效
    用于使用二维内插控制电动辅助转向系统的方法和装置,用于当前命令

    公开(公告)号:US5475289A

    公开(公告)日:1995-12-12

    申请号:US334243

    申请日:1994-11-04

    CPC分类号: B62D5/046 H02P6/28 Y10S388/93

    摘要: A control arrangement for an electric assist steering system having a variable reluctance motor (26) includes sensing (54) motor position and sensing (110) applied steering torque. A controller determines a desired motor torque assist value in response to the applied steering torque. A plurality of look-up tables are provided having a plurality of motor current values versus motor position values stored therein. The stored motor current values are functionally related to motor position values. The controller selects a first (T1) and second (T2) torque look-up table from the plurality of look-up tables. The first look-up table corresponds to a torque value less than the desired motor torque assist value. The second look-up table corresponds to a torque value greater than the desired motor torque assist value. A first motor current value (I1) is determined by interpolating between two current values corresponding to two motor positions stored in the first look-up table closest to the sensed motor position. A second motor current value (I2) is determined by interpolating between two current values corresponding to two motor positions stored in the second look-up table closest to the sensed motor position. A final motor current value (ICMD) is determined by interpolating between the first and second determined motor current values. A motor control signal is provided in response to the determined final motor current value.

    摘要翻译: 具有可变磁阻电动机(26)的电动辅助转向系统的控制装置包括感测(54)电动机位置和感测(110)施加的转向转矩。 控制器响应于所施加的转向转矩来确定期望的电动机转矩辅助值。 提供了多个查找表,其具有与存储在其中的电动机位置值相对应的多个电动机电流值。 存储的电机电流值在功能上与电机位置值有关。 控制器从多个查找表中选择第一(T1)和第二(T2)扭矩查找表。 第一查找表对应于小于期望的电动机转矩辅助值的转矩值。 第二查找表对应于大于期望的电动机转矩辅助值的转矩值。 第一电动机电流值(I1)通过内插在与感测到的电动机位置最接近的第一查找表中存储的两个电动机位置的两个电流值之间来确定。 第二电动机电流值(I2)通过内插在与感测到的电动机位置最接近的第二查找表中存储的两个电动机位置的两个电流值之间来确定。 通过在第一和第二确定的电动机电流值之间进行插值来确定最终的电动机电流值(ICMD)。 响应于确定的最终电动机电流值提供电动机控制信号。

    Method and apparatus for determining faults in an electric assist steering system
    6.
    发明授权
    Method and apparatus for determining faults in an electric assist steering system 有权
    用于确定电动辅助转向系统中的故障的方法和装置

    公开(公告)号:US07483796B2

    公开(公告)日:2009-01-27

    申请号:US11007520

    申请日:2004-12-08

    IPC分类号: G01R31/00

    摘要: A method and apparatus for determining a fault in an electric motor (50) determines a calculated star voltage (Vstar—calc) of the electric motor. The calculated star voltage (Vstar—calc) is compared to a measured star voltage (Vstar—meas) of the electric motor (50) to determine a star voltage error (Vstar—err). The fault in the electric motor (50) is determined when the star voltage error (Vstar—err) exceeds a predetermined maximum star voltage error (Vstar—err—max).

    摘要翻译: 用于确定电动机(50)中的故障的方法和装置确定电动机的计算的星形电压(Vstar calc)。 将计算的星形电压(Vstar calc)与电动机(50)的测量的星形电压(Vstar meas)进行比较,以确定星形电压误差(Vstar - err)。 当星形电压误差(Vstar err)超过预定的最大星形电压误差(Vstar err -err)时,确定电动机(50)中的故障, max)。

    Method and apparatus for controlling an electric assist motor using a modified blending filter

    公开(公告)号:US06789641B2

    公开(公告)日:2004-09-14

    申请号:US10219560

    申请日:2002-08-14

    IPC分类号: B62D509

    CPC分类号: B62D5/0463

    摘要: A method for controlling an electric assist motor (50) for providing steering assist in response to a sensed torque signal (&tgr;s) includes the step of filtering the sensed torque signal to provide a low frequency torque signal (&tgr;sL) and a high frequency torque signal (&tgr;sH). A low frequency assist torque signal (&tgr;assistLF) is determined as a function of the low frequency torque signal (&tgr;sL). A high frequency assist gain signal (Kmax) is determined as a function of the sensed torque signal (&tgr;s) and a sensed vehicle speed (&ngr;). The high frequency assist gain signal (Kmax) is applied to the high frequency torque signal (&tgr;sH) to determine a high frequency assist torque signal (&tgr;assistHF) A torque command signal (&tgr;cmd) is determined as a function of the low frequency assist torque signal (&tgr;assistLF) and the high frequency assist torque signal (&tgr;assistHF) The electric assist motor (50) is commanded to provide steering assist in accordance with the torque command signal (&tgr;cmd).

    Electric assist steering system having an improved motor current
controller with gain scheduler
    8.
    发明授权
    Electric assist steering system having an improved motor current controller with gain scheduler 失效
    电动助力转向系统具有改进的带增益调节器的电机电流控制器

    公开(公告)号:US6046560A

    公开(公告)日:2000-04-04

    申请号:US45555

    申请日:1998-03-20

    摘要: A motor controller controls the operation of an electric motor (28). The motor controller includes sensors (30, 97, 102) for sensing at least one dynamic operating characteristic of the motor and for providing a signal indicative of the at least one sensed dynamic motor operating characteristic. A variable gain regulator (190) receives a current command request signal having a value and provides a motor current control signal having a value functionally related to the value of the received current command request signal and a gain control value. A gain scheduler (196) is operatively coupled to the variable gain regulator (190) and to the sensor (30, 97, 102) for providing the gain control value to the variable gain regulator (196) in response to the sensed at least one dynamic motor operating characteristic to thereby control the amount of gain of the variable gain regulator (190). The motor controller further includes a drive circuit (204, 120) operatively connected to the variable gain regulator (190) and the motor (28) for energizing the motor in response to the motor current control signal.

    摘要翻译: 电动机控制器控制电动机(28)的操作。 电动机控制器包括用于感测电动机的至少一个动态工作特性的传感器(30,97,102),并用于提供指示至少一个所感测的动态电动机工作特性的信号。 可变增益调节器(190)接收具有值的电流指令请求信号,并提供具有与所接收的电流指令请求信号的值和增益控制值功能相关的值的电动机电流控制信号。 增益调节器(196)可操作地耦合到可变增益调节器(190)和传感器(30,97,102),用于响应于感测到的至少一个来向可变增益调节器(196)提供增益控制值 动态电机操作特性,从而控制可变增益调节器(190)的增益量。 电动机控制器还包括可操作地连接到可变增益调节器(190)的驱动电路(204,120)和用于响应于电动机电流控制信号使电动机通电的电动机(28)。

    Method and apparatus for controlling an electric assist steering system
    9.
    发明授权
    Method and apparatus for controlling an electric assist steering system 失效
    用于控制电动助力转向系统的方法和装置

    公开(公告)号:US5568389A

    公开(公告)日:1996-10-22

    申请号:US212112

    申请日:1994-03-11

    CPC分类号: B62D5/0463

    摘要: A steering assist system (10) providing assist in response to a steering control signal includes a vehicle speed sensor (150) for sensing vehicle speed and for providing a speed signal having a value indicative of the sensed vehicle speed and a torque sensor (110) operatively connected to a vehicle hand wheel (12) for providing a torque signal indicative of applied steering torque. A controller (120) is connected to the vehicle speed sensor (150) and to the torque sensor (110). The controller (120) includes a first set of torque-in vs. torque-out assist values (132) associated with a first vehicle speed and a second set of torque-in vs. torque-out assist values (130) associated with a second vehicle speed. The controller (120) provides the steering control signal in response to applied steering torque and having a value functionally related to (i) the vehicle speed signal and (ii) both the first set and second set of torque-in vs. torque-out assist values.

    摘要翻译: 提供响应于转向控制信号的帮助的转向辅助系统(10)包括用于感测车辆速度并提供具有指示感测车速的值的速度信号的车速传感器(150)和扭矩传感器(110) 可操作地连接到车辆手轮(12),用于提供指示施加的转向扭矩的扭矩信号。 控制器(120)连接到车速传感器(150)和扭矩传感器(110)。 控制器(120)包括与第一车辆速度相关联的第一组转矩输入与转矩输出辅助值(132)以及与第一车速相关联的第二组转矩输入与转矩输出辅助值(130) 第二车速。 控制器(120)响应于所施加的转向扭矩提供转向控制信号,并具有与(i)车速信号功能相关的值,以及(ii)第一组和第二组转矩输出与转矩输出 辅助价值。

    Method and apparatus for controlling an electric assist steering system
using an adaptive torque filter
    10.
    发明授权
    Method and apparatus for controlling an electric assist steering system using an adaptive torque filter 失效
    使用自适应扭矩滤波器控制电动辅助转向系统的方法和装置

    公开(公告)号:US5473231A

    公开(公告)日:1995-12-05

    申请号:US241053

    申请日:1994-05-11

    CPC分类号: B62D5/0463 B62D6/10

    摘要: A steering assist system (10) providing assist in response to a steering control signal includes a vehicle speed sensor (56) for sensing vehicle speed and for providing a speed signal having a value indicative of the sensed vehicle speed and a torque sensor (44) operatively connected to a vehicle hand wheel (12) for providing a torque signal indicative of applied steering torque. A controller is connected to the vehicle speed sensor (56) and to the torque sensor (44). The controller includes an adaptive torque filter (80) that maintains a selectable system bandwidth independent of gain changes and vehicle speed changes. The adaptive filter (80) recovers any gain reduction by increasing the frequency of a filter pole.

    摘要翻译: 提供响应于转向控制信号的帮助的转向辅助系统(10)包括:用于感测车辆速度并提供具有指示感测车速的值的速度信号的车速传感器(56)和扭矩传感器(44) 可操作地连接到车辆手轮(12),用于提供指示施加的转向扭矩的扭矩信号。 控制器连接到车速传感器(56)和扭矩传感器(44)。 控制器包括自适应扭矩滤波器(80),其保持独立于增益变化和车辆速度变化的可选择的系统带宽。 自适应滤波器(80)通过增加滤波器极的频率来恢复任何增益减小。