公开(公告)号：US08392069B2

公开(公告)日：2013-03-05

申请号：US13362483

申请日：2012-01-31

Applicant: Balarama V. Murty ,  Suresh Gopalakrishnan ,  Kenneth J. Shoemaker ,  Chandra S. Namuduri ,  Bradley Bezzina ,  Ebrahim Handy

Inventor： Balarama V. Murty ,  Suresh Gopalakrishnan ,  Kenneth J. Shoemaker ,  Chandra S. Namuduri ,  Bradley Bezzina ,  Ebrahim Handy

IPC: B62D5/30 ,  B62D5/04

CPC classification number: B62D5/063 ,  B62D5/065 ,  F04C14/08

Abstract: A system and method for managing faults occurring in a power steering system in a vehicle is disclosed that has particular application for an MRHPS system to provide reliable functioning of the power steering system. The method includes detecting a fault condition in the MRHPS system and selecting a safe mode from a plurality of predetermined safe modes based on the fault condition. The plurality of predetermined safe modes include a normal operation mode, an engine speed follow mode, a manual mode, a fixed duty cycle mode and a voltage control mode. If a fault condition is detected, the method applies the safe mode to manage the fault condition.

Abstract translation: 公开了一种用于管理在车辆中的动力转向系统中发生的故障的系统和方法，其具有用于提供动力转向系统的可靠功能的MRHPS系统的特定应用。 该方法包括检测MRHPS系统中的故障状况，并根据故障状况从多个预定的安全模式中选择安全模式。 多个预定的安全模式包括正常操作模式，发动机速度跟随模式，手动模式，固定占空比模式和电压控制模式。 如果检测到故障条件，则采用安全模式管理故障状态。

公开(公告)号：US20120181854A1

公开(公告)日：2012-07-19

申请号：US13006542

申请日：2011-01-14

Applicant: Suresh Gopalakrishnan ,  Chandra S. Namuduri ,  Mark C. Hoinka ,  Sanjeev M. Naik ,  Lei Hao

Inventor： Suresh Gopalakrishnan ,  Chandra S. Namuduri ,  Mark C. Hoinka ,  Sanjeev M. Naik ,  Lei Hao

IPC: B60L1/00

CPC classification number: B60L11/1861 ,  B60L11/1868 ,  B60L2210/10 ,  B60L2240/12 ,  B60L2240/545 ,  Y02T10/7016 ,  Y02T10/7044 ,  Y02T10/7066 ,  Y02T10/7216

Abstract: An on-vehicle DC/DC converter transforms high-voltage electric power originating from an on-vehicle high-voltage source to low-voltage electric power at a regulated voltage level. The low-voltage electric power is distributed by a low-voltage bus. A method for operating the DC/DC converter includes monitoring a state of charge and a temperature of a low-voltage battery connected to the low-voltage bus, setting a DC/DC converter command to a nominal voltage level as a function of the state of charge and temperature of the low-voltage battery, monitoring a total low-voltage electric load, and adjusting the DC/DC converter command to a minimum low-voltage reference voltage when the vehicle is operating below a predetermined speed and the total low-voltage electric load is greater than a predetermined load.

Abstract translation: 车载DC / DC转换器将来自车载高压源的高压电力以稳定的电压水平转换为低压电力。 低压电力由低压母线分配。 用于操作DC / DC转换器的方法包括监视与低压总线连接的低电压电池的充电状态和温度，将DC / DC转换器命令设置为作为状态的函数的标称电压电平 的低压电池的充电和温度，监测总的低压电负载，并且当车辆运行低于预定速度时，将DC / DC转换器命令调整到最小的低电压参考电压， 电压电负载大于预定负载。

公开(公告)号：US20100146083A1

公开(公告)日：2010-06-10

申请号：US12703295

申请日：2010-02-10

Applicant: Hrishikesh A. Vidwans ,  Suresh Gopalakrishnan ,  Shirish H. Phatak ,  Murali Rangarajan

Inventor： Hrishikesh A. Vidwans ,  Suresh Gopalakrishnan ,  Shirish H. Phatak ,  Murali Rangarajan

IPC: G06F15/16

CPC classification number: H04L67/06 ,  H04L67/1095 ,  H04L67/2861

Abstract: The present invention, in particular embodiments, provides methods, apparatuses and systems directed to providing a Wide Area File System that is robust against network connectivity issues. In particular implementations, the present invention provides a WAFS disconnected-mode read-write access that provides for a more seamless user experience against WAN or other network connectivity failures. Specific embodiments provide for management, at a network device such as an EFG node, of file objects previously opened during a connected state with a remote file server appliance, creation of new file objects during a disconnected state and re-synchronization of those file objects (data and meta-data) when a connection becomes available.

Abstract translation: 本发明在特定实施例中提供了针对网络连接问题提供鲁棒的广域文件系统的方法，装置和系统。 在特定实施方式中，本发明提供了一种WAFS断开模式读写访问，为WAN或其他网络连接故障提供更无缝的用户体验。 具体实施例提供了在诸如EFG节点的网络设备处管理在与远程文件服务器设备的连接状态期间先前打开的文件对象，在断开状态期间创建新文件对象以及重新同步这些文件对象 数据和元数据）。

公开(公告)号：US20120130594A1

公开(公告)日：2012-05-24

申请号：US13362483

申请日：2012-01-31

Applicant: Balarama V. Murty ,  Suresh Gopalakrishnan ,  Kenneth J. Shoemaker ,  Chandra S. Namuduri ,  Bradley Bezzina ,  Ebrahim Handy

Inventor： Balarama V. Murty ,  Suresh Gopalakrishnan ,  Kenneth J. Shoemaker ,  Chandra S. Namuduri ,  Bradley Bezzina ,  Ebrahim Handy

IPC: B62D5/30 ,  B62D6/00

CPC classification number: B62D5/063 ,  B62D5/065 ,  F04C14/08

Abstract: A system and method for managing faults occurring in a power steering system in a vehicle is disclosed that has particular application for an MRHPS system to provide reliable functioning of the power steering system. The method includes detecting a fault condition in the MRHPS system and selecting a safe mode from a plurality of predetermined safe modes based on the fault condition. The plurality of predetermined safe modes include a normal operation mode, an engine speed follow mode, a manual mode, a fixed duty cycle mode and a voltage control mode. If a fault condition is detected, the method applies the safe mode to manage the fault condition.

Abstract translation: 公开了一种用于管理在车辆中的动力转向系统中发生的故障的系统和方法，其具有用于提供动力转向系统的可靠功能的MRHPS系统的特定应用。 该方法包括检测MRHPS系统中的故障状况，并根据故障状况从多个预定的安全模式中选择安全模式。 多个预定的安全模式包括正常操作模式，发动机速度跟随模式，手动模式，固定占空比模式和电压控制模式。 如果检测到故障条件，则采用安全模式管理故障状态。

公开(公告)号：US08150579B2

公开(公告)日：2012-04-03

申请号：US12412705

申请日：2009-03-27

Applicant: Balarama V. Murty ,  Suresh Gopalakrishnan ,  Kenneth J. Shoemaker ,  Chandra S. Namuduri ,  Bradley Bezzina ,  Ebrahim Handy

Inventor： Balarama V. Murty ,  Suresh Gopalakrishnan ,  Kenneth J. Shoemaker ,  Chandra S. Namuduri ,  Bradley Bezzina ,  Ebrahim Handy

IPC: B62D5/06

CPC classification number: B62D5/063 ,  B62D5/065 ,  F04C14/08

Abstract: A method for determining a speed of a power steering pump used in a power steering assembly of a vehicle that has particular application in a vehicle using a magneto-rheological hydraulic power steering (MRHPS) system for improving the fuel efficiency and ride comfort of the vehicle, and for reliable functioning of the power steering system. The method includes determining an angle of rotation of the steering wheel and a rate of change of the angle of rotation of the steering wheel based on the angle of rotation of the steering wheel of the vehicle. The method further includes determining the speed of the vehicle and the speed of the power steering pump based on the angle of rotation of the steering wheel, the rate of change of the angle of rotation of the steering wheel and the speed of the vehicle.

Abstract translation: 一种用于确定在车辆的动力转向组件中使用的动力转向泵的速度的方法，其特别应用于使用磁流变液压动力转向（MRHPS）系统的车辆中，以改善车辆的燃料效率和乘坐舒适性 ，并且用于动力转向系统的可靠功能。 该方法包括基于车辆的方向盘的旋转角度确定方向盘的旋转角度和方向盘的旋转角度的变化率。 该方法还包括基于方向盘的旋转角度，方向盘的旋转角度和车辆速度的变化率来确定车辆的速度和动力转向泵的速度。

公开(公告)号：US20100326070A1

公开(公告)日：2010-12-30

申请号：US12784541

申请日：2010-05-21

Applicant: Lei Hao ,  Chandra S. Namuduri ,  Kenneth J. Shoemaker ,  Suresh Gopalakrishnan ,  Sanjeev M. Naik ,  Xiujie Gao ,  Paul W. Alexander ,  Richard J. Skurkis ,  Tony J. Deschutter

Inventor： Lei Hao ,  Chandra S. Namuduri ,  Kenneth J. Shoemaker ,  Suresh Gopalakrishnan ,  Sanjeev M. Naik ,  Xiujie Gao ,  Paul W. Alexander ,  Richard J. Skurkis ,  Tony J. Deschutter

IPC: F03G7/06

CPC classification number: H01H61/0107

Abstract: A linear actuator associated with an actuator system for a device includes a wire cable fabricated from an active material. The linear actuator couples to the device and to the moveable element. The active material induces strain in the linear actuator in response to an activation signal. The linear actuator translates the moveable element relative to the device in response to the induced strain. An activation controller electrically connects to the linear actuator and generates the activation signal. A position feedback sensor monitors a position of the moveable element.

Abstract translation: 与用于装置的致动器系统相关联的线性致动器包括由活性材料制成的线缆。 线性致动器耦合到装置和可移动元件。 响应于激活信号，活性材料在线性致动器中引起应变。 线性执行器响应于感应应变而相对于装置平移可移动元件。 激活控制器电连接到线性致动器并产生激活信号。 位置反馈传感器监测可移动元件的位置。

公开(公告)号：US07734733B1

公开(公告)日：2010-06-08

申请号：US11763755

申请日：2007-06-15

Applicant: Hrishikesh A. Vidwans ,  Suresh Gopalakrishnan ,  Shirish H. Phatak ,  Murali Rangarajan

Inventor： Hrishikesh A. Vidwans ,  Suresh Gopalakrishnan ,  Shirish H. Phatak ,  Murali Rangarajan

IPC: G06F15/16

CPC classification number: H04L67/06 ,  H04L67/1095 ,  H04L67/2861

Abstract: The present invention, in particular embodiments, provides methods, apparatuses and systems directed to providing a Wide Area File System that is robust against network connectivity issues. In particular implementations, the present invention provides a WAFS disconnected-mode read-write access that provides for a more seamless user experience against WAN or other network connectivity failures. Specific embodiments provide for management, at a network device such as an EFG node, of file objects previously opened during a connected state with a remote file server appliance, creation of new file objects during a disconnected state and re-synchronization of those file objects (data and meta-data) when a connection becomes available.

Abstract translation: 本发明在特定实施例中提供了针对网络连接问题提供鲁棒的广域文件系统的方法，装置和系统。 在特定实施方式中，本发明提供了一种WAFS断开模式读写访问，为WAN或其他网络连接故障提供更无缝的用户体验。 具体实施例提供了在诸如EFG节点的网络设备处管理在与远程文件服务器设备的连接状态期间先前打开的文件对象，在断开状态期间创建新文件对象以及重新同步这些文件对象 数据和元数据）。

公开(公告)号：US20090269043A1

公开(公告)日：2009-10-29

申请号：US12109676

申请日：2008-04-25

Applicant: Chandra S. Namuduri ,  Suresh Gopalakrishnan ,  Robert R. Bolio ,  Ross Feller ,  Balarama V. Murty

Inventor： Chandra S. Namuduri ,  Suresh Gopalakrishnan ,  Robert R. Bolio ,  Ross Feller ,  Balarama V. Murty

IPC: H02P7/29

CPC classification number: B62D5/046

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US07095205B2

公开(公告)日：2006-08-22

申请号：US10240622

申请日：2001-03-29

Applicant: Mehrdad Ehsani ,  Suresh Gopalakrishnan

Inventor： Mehrdad Ehsani ,  Suresh Gopalakrishnan

IPC: H02P1/46 ,  H02P3/18 ,  H02P6/00 ,  H02P23/00 ,  H02P25/00

CPC classification number: H02P6/18 ,  H02P25/089

Abstract: A controller (72) for a switched reluctance machine (20) implements a model of at least one active phase representing dynamic magnetic machine characteristics. The controller (72) determines machine control signals based on rotational position obtained by numerically solving the model with measured machine operating parameters. The model may be implemented as the sum of orthogonal functions relating active phase voltage and current with constants derived from phase inductance to obtain the rotor angle.

Abstract translation: 用于开关磁阻电机（20）的控制器（72）实现表示动态磁力机特性的至少一个有效相位的模型。 控制器（72）基于通过用测量的机器操作参数数字求解模型获得的旋转位置来确定机器控制信号。 该模型可以实现为将有源相电压和电流与从相电感得出的常数相关联的正交函数的和，以获得转子角度。

公开(公告)号：US07009406B2

公开(公告)日：2006-03-07

申请号：US10831733

申请日：2004-04-23

Applicant: Malakondaiah Naidu ,  Thomas J. Schoepf ,  Suresh Gopalakrishnan

Inventor： Malakondaiah Naidu ,  Thomas J. Schoepf ,  Suresh Gopalakrishnan

IPC: G01R31/12

CPC classification number: H02H1/0015 ,  G01R31/025 ,  H02H3/44

Abstract: The present invention discloses an arc fault detector including a shunt resistor deployed in a circuit being protected, an arc discriminator sensing voltages across the shunt resistor and outputting an arc detection signal when it detects current variations caused by parallel and series arc faults, a signal transformer buffering the arc detection signal and outputting a pulse, a switch transient detector detecting a voltage differential across load switches and outputting a pulsed switch transient detection signal when the voltage differential across load switches exceeds a reference value, a line interrupter such as a static relay, a switch controller including logic gates generating a trip signal based on predetermined criteria, and a manual switch for resetting the line interrupter. A second embodiment of the present invention senses voltage induced in a coil wrapped around a toroidal core to detect current variations in conductors which pass through the center of the toroidal core.

Abstract translation: 本发明公开了一种电弧故障检测器，包括部分在被保护电路中的分流电阻器，电弧鉴别器检测分流电阻器两端的电压，并在检测到由并联和串联电弧故障引起的电流变化时输出电弧检测信号;信号变压器 缓冲电弧检测信号并输出​​脉冲，开关瞬态检测器检测负载开关两端的电压差，并且当负载开关两端的电压差超过参考值时输出脉冲开关瞬态检测信号;线路中断器如静态继电器; 开关控制器，包括基于预定标准产生跳闸信号的逻辑门，以及用于复位线路断路器的手动开关。 本发明的第二实施例感测缠绕在环形磁芯上的线圈中感应的电压，以检测通过环形磁芯中心的导体中的电流变化。