公开(公告)号：US5386472A

公开(公告)日：1995-01-31

申请号：US842880

申请日：1992-02-26

申请人： Donald P. Pfaff ,  Nick S. Kapsokavathis

发明人： Donald P. Pfaff ,  Nick S. Kapsokavathis

IPC分类号： F01N1/06 ,  F02B27/00 ,  F02M35/12 ,  G10K11/178 ,  H03H21/00 ,  A61F11/06 ,  H04R3/02 ,  H04B15/00

CPC分类号： G10K11/1788 ,  F01N1/065 ,  F02B27/001 ,  F02M35/125 ,  G10K11/1784 ,  H03H21/0012 ,  G10K2210/121 ,  G10K2210/12822 ,  G10K2210/3039 ,  G10K2210/3045 ,  Y02T10/146

摘要： A active noise control system having a digital signal processor programmed to function as adaptive digital filter with an output saturation control is described. The programmed adaptive filter has a specified maximum value for its output signal, above which the output signal becomes clipped and a condition commonly known as filter output saturation occurs. According to the described system, the filter output signal value is monitored to detect the occurrence of filter output saturation. When output saturation is detected, the normal adaptation of the filter is modified to reduce the value of the filter output signal to prevent the further occurrence of filter output saturation. Based upon the detection of filter output saturation, a power reference level is established to estimate the maximum average power that the output signal can contain without causing saturation. The adaptation of filter weighting coefficients is then scaled in accordance with the difference between the established power reference level and a computed average power associated with the filter output signal to prevent the occurrence of filter output saturation.

摘要翻译： 描述了具有被编程为用作具有输出饱和度控制的自适应数字滤波器的数字信号处理器的主动噪声控制系统。 编程的自适应滤波器对其输出信号具有指定的最大值，其上的输出信号被限幅，并且通常称为滤波器输出饱和的条件发生。 根据所描述的系统，监视滤波器输出信号值以检测滤波器输出饱和度的发生。 当检测到输出饱和时，修改滤波器的正常自适应以减少滤波器输出信号的值，以防止进一步发生滤波器输出饱和。 基于滤波器输出饱和度的检测，建立功率参考电平以估计输出信号可以包含的最大平均功率而不引起饱和。 然后根据所建立的功率参考电平和与滤波器输出信号相关联的计算的平均功率之间的差来缩放滤波器加权系数的适应，以防止滤波器输出饱和的发生。

公开(公告)号：US5146505A

公开(公告)日：1992-09-08

申请号：US594495

申请日：1990-10-04

申请人： Donald P. Pfaff ,  Nick S. Kapsokavathis ,  Natalie A. Parks

发明人： Donald P. Pfaff ,  Nick S. Kapsokavathis ,  Natalie A. Parks

IPC分类号： F01N1/06 ,  G10K11/178

CPC分类号： G10K11/1784 ,  F01N1/065 ,  G10K11/1788 ,  G10K2210/121 ,  G10K2210/3032 ,  G10K2210/3033 ,  G10K2210/3039 ,  G10K2210/3045 ,  G10K2210/3046 ,  G10K2210/3211

摘要： A method is described for attenuating the amplitudes of multiple harmonic noise components contained within noise generated by an internal combustion engine, based upon the rotation of the engine in its operating cycle. A signal representing selected multiple harmonic noise components is generated from a table of values, based upon the engine rotation. This signal is adaptively filtered to produce a canceling waveform, which is superimposed with the engine noise to attenuate the selected multiple noise harmonics. The method is useful for selecting and attenuating dominant noise harmonics produced at different engine speeds or by different types of engines, and the dominant harmonics of different forms of noise produced by the same engine.

公开(公告)号：US07278940B2

公开(公告)日：2007-10-09

申请号：US11010552

申请日：2004-12-13

申请人： Anthony P. Tata ,  Kyle K. Kinsey ,  Robert D. Burns ,  Brendan M. Conlon ,  Donald P. Pfaff ,  Mark A. Theobald ,  Mark A. Damico

发明人： Anthony P. Tata ,  Kyle K. Kinsey ,  Robert D. Burns ,  Brendan M. Conlon ,  Donald P. Pfaff ,  Mark A. Theobald ,  Mark A. Damico

IPC分类号： F16H3/72

CPC分类号： B60K6/365 ,  B60K1/02 ,  B60K6/445 ,  B60K6/48 ,  B60K6/543 ,  B60W10/105 ,  F16H3/728 ,  F16H2037/0866 ,  F16H2037/106 ,  F16H2200/201 ,  Y02T10/6221 ,  Y02T10/6239 ,  Y10S903/945 ,  Y10T477/24 ,  Y10T477/65 ,  Y10T477/675

摘要： A powertrain includes an engine with an engine output member and a transmission with two motor/generators and a transmission input member operatively connected to the engine output member. A control unit is configured to selectively cause a device to resist or prevent rotation of the input member in response to the existence of certain conditions, such as the engine not supplying torque to the transmission and the transmission being in reverse operating mode. Resisting or preventing rotation of the input member improves transmission performance when only the motor/generators are supplying torque to propel the vehicle. A corresponding method is also provided.

摘要翻译： 动力系包括具有发动机输出构件的发动机和具有两个电动机/发电机的变速器以及可操作地连接到发动机输出构件的变速器输入构件。 控制单元被配置为响应于某些条件的存在，例如发动机不向变速器提供扭矩并且变速器处于反向操作模式，选择性地使装置抵抗或防止输入构件的旋转。 当只有电机/发电机提供转矩来推动车辆时，抵抗或防止输入构件的旋转提高了传动性能。 还提供了相应的方法。