公开(公告)号：US5548653A

公开(公告)日：1996-08-20

申请号：US110176

申请日：1993-08-20

Applicant: Frederic C. Pla ,  Robert A. Hedeen ,  Imdad Imam

Inventor： Frederic C. Pla ,  Robert A. Hedeen ,  Imdad Imam

IPC: G10K11/178 ,  A61F11/06

CPC classification number: G10K11/1788 ,  G10K2210/116 ,  G10K2210/1161 ,  G10K2210/129 ,  G10K2210/3027 ,  G10K2210/3216 ,  G10K2210/509

Abstract: An active noise and vibration control system which minimizes noise output by creating a secondary, cancelling noise and/or vibration field using vibrational inputs. The system includes one or more piezoceramic actuators mounted to the inner surface of a magnetic resonance imaging device. The actuators can be either mounted directly to the device or to one or more noise cancelling members which are resiliently mounted to the device. Transducers are also provided for sensing the noise or vibrations generated by the device and producing an error signal corresponding to the level of noise or vibrations sensed. A controller sends a control signal to the actuators in response to the error signal, thereby causing the actuators to vibrate and generate a noise or vibration field which minimizes the total noise emanating from the device. Alternatively, the system can use noise and vibration feedback simultaneously.

Abstract translation: 一种主动噪声和振动控制系统，通过使用振动输入创建次级，消除噪声和/或振动场，使噪声输出最小化。 该系统包括安装到磁共振成像装置的内表面的一个或多个压电陶瓷致动器。 致动器可以直接安装到设备或者被安装到设备上的一个或多个噪声消除构件。 还提供传感器用于感测由装置产生的噪声或振动，并产生对应于所感测到的噪声或振动水平的误差信号。 控制器响应于误差信号向致动器发送控制信号，从而使致动器振动并产生最小化从设备发出的总噪声的噪声或振动场。 或者，系统可以同时使用噪声和振动反馈。

公开(公告)号：US5454904A

公开(公告)日：1995-10-03

申请号：US286722

申请日：1994-08-05

Applicant: Mario Ghezzo ,  Richard J. Saia ,  Bharat S. Bagepalli ,  Imdad Imam ,  Dennis L. Polla

Inventor： Mario Ghezzo ,  Richard J. Saia ,  Bharat S. Bagepalli ,  Imdad Imam ,  Dennis L. Polla

IPC: B29C35/08 ,  B29C59/16 ,  H01H1/06 ,  H01H9/40 ,  H01H50/00 ,  B44C1/22 ,  B29C37/00 ,  C23F1/00

CPC classification number: H01H50/005 ,  B29C59/16 ,  B29C2035/0838 ,  H01H1/06 ,  H01H2001/0057 ,  H01H9/40 ,  Y10S438/94 ,  Y10T307/74

Abstract: Micromachining methods for fabricating micromechanical structures which include plunger elements free to reciprocate within cavities are fabricated using processing steps in common with those employed in high density interconnect (HDI) technology for multi-chip module packaging. A polymer, such as a polyimide, is utilized as a micromachinable material. In one embodiment, cavities are formed in the polymer material by laser ablation, employing a sacrificial layer as a mask. Electroplated copper may be employed as a sacrificial release layer. One particular structure is a micromechanical electric switch including an array of individual switch contacts actuatable in common.

Abstract translation: 用于制造微机械结构的微加工方法，其包括在空腔内自由往复运动的柱塞元件的微机械结构使用与用于多芯片模块封装的高密度互连（HDI）技术中采用的步骤相同的处理步骤来制造。 聚合物如聚酰亚胺被用作可微加工材料。 在一个实施例中，通过激光烧蚀在聚合物材料中形成空腔，采用牺牲层作为掩模。 电镀铜可以用作牺牲剥离层。 一个特定结构是微机电式电开关，其包括可共同致动的单独开关触点的阵列。

公开(公告)号：US5726617A

公开(公告)日：1998-03-10

申请号：US507131

申请日：1995-07-31

Applicant: Frederic Ghislain Pla ,  Imdad Imam ,  Frank Albert Pitman, Jr. ,  Stephen Linwood Smith

Inventor： Frederic Ghislain Pla ,  Imdad Imam ,  Frank Albert Pitman, Jr. ,  Stephen Linwood Smith

IPC: H01F27/33 ,  H01F15/00

CPC classification number: H01F27/33

Abstract: An electrical transformer includes a tank containing transformer fluid and a transformer core and winding subassembly located in the transformer fluid within the tank. The electrical transformer also includes a mechanism for varying the dynamic pressure of the transformer fluid within the tank during electromagnetic operation of the transformer core and winding subassembly to cancel out (or reduce) noise-causing vibrations in the transformer fluid which come from the operating transformer core and winding subassembly. Preferably, the electrical transformer further includes an active mount subassembly.

Abstract translation: 一个电力变压器包括一个容纳变压器流体的容器，以及一个变压器铁心和位于水箱内的变压器流体中的绕组组件。 电变压器还包括用于在变压器铁芯和绕组组件的电磁操作期间改变容器内的变压器流体的动态压力的机构，以抵消（或减少）来自操作变压器的变压器流体中的噪声引起的振动 铁芯和绕组组件。 优选地，电变压器还包括主动安装子组件。

公开(公告)号：US5633800A

公开(公告)日：1997-05-27

申请号：US964168

申请日：1992-10-21

Applicant: Raymond J. Bankert ,  Imdad Imam ,  Harindra Rajiyah

Inventor： Raymond J. Bankert ,  Imdad Imam ,  Harindra Rajiyah

IPC: G07C3/00 ,  G07C3/14

CPC classification number: G07C3/00 ,  Y10S706/92

Abstract: A diagnostic system and method for rotating machinery having mechanical problems combine AI-based interpretive reasoning with rotordynamic-based modeling and numerical optimization. A vibration response in the machinery to be diagnosed is first measured by machine sensors, and this measured response is used in a rule-based expert system to determine a probable cause of the machinery's mechanical problem. An appropriate finite element analytical model of the machinery is generated based on the probable cause. An optimizer computes the predicted response from the analytical model and compares it with the measured response. The model is automatically refined, guided by the expert system and numerical optimization, to match the predicted response with the measured response. The modifications to the model necessary to duplicate the measured response of the defective machinery are then indicative of the defects.

Abstract translation: 具有机械问题的旋转机械的诊断系统和方法将基于AI的解释推理与基于旋转动力学的建模和数值优化相结合。 要诊断的机械中的振动响应首先由机器传感器测量，并且该测量响应在基于规则的专家系统中用于确定机械机械问题的可能原因。 基于可能的原因生成机械的适当的有限元分析模型。 优化器计算来自分析模型的预测响应并将其与测量响应进行比较。 该模型在专家系统和数值优化指导下自动细化，将预测响应与测量响应相匹配。 复制有缺陷机械的测量响应所需的模型的修改然后表示缺陷。

公开(公告)号：US4975031A

公开(公告)日：1990-12-04

申请号：US294722

申请日：1989-01-09

Applicant: Sampathkumaran Bagepalli ,  Imdad Imam

Inventor： Sampathkumaran Bagepalli ,  Imdad Imam

IPC: F04C29/06

CPC classification number: F04C29/068

Abstract: Objectionable noise in a rotary compressor is reduced by placing cavities in the sliding vane and/or the rolling piston. The cavities are used to change the local compliance of surfaces which impact one another to generate the objectionable noise. The change in the compliance of impacting surfaces is used to change the frequency of the noise generated by the impacting surfaces.

Abstract translation: 通过将空腔放置在滑动叶片和/或滚动活塞中来减少旋转式压缩机中的不良噪声。 空腔用于改变彼此影响的表面的局部顺应性，以产生令人不快的噪音。 使用冲击表面顺从性的变化来改变冲击表面产生的噪音的频率。

公开(公告)号：US4384182A

公开(公告)日：1983-05-17

申请号：US154236

申请日：1980-05-29

Applicant: Imdad Imam

Inventor： Imdad Imam

IPC: H01H33/34 ,  H01H35/38

CPC classification number: H01H33/34 ,  H01H2033/308

Abstract: This actuator comprises a fluid motor having a piston, a breaker-opening space at one side of the piston, and a breaker-closing space at its opposite side. An accumulator freely communicates with the breaker-opening space for supplying pressurized fluid thereto during a circuit breaker opening operation. The breaker-opening space and the breaker-closing space are connected by an impeded flow passage. A pilot valve opens to allow the pressurized liquid in the breaker-closing space to flow to a back chamber of a normally closed main valve to cause the main valve to be opened during a circuit breaker opening operation to release the pressurized liquid from the breaker-closing space. An impeded passage affords communication between the back chamber and a sump located on the opposite side of the main valve from the back chamber. The pilot valve and impeded passage allow rapid opening of the main valve with pressurized liquid from the breaker closing side of the piston.

Abstract translation: 该致动器包括具有活塞的流体马达，在活塞的一侧的断路器开口空间和在其相对侧的断路器闭合空间。 在断路器打开操作期间，蓄能器与断路器开口空间自由地连通以供应加压流体。 断路器开口空间和断路器闭合空间通过阻流通道连接。 先导阀打开以允许断路器关闭空间中的加压液体流动到常闭主阀的后室，以在断路器打开操作期间使主阀打开，以将压力液体从断路器 - 关闭空间。 妨碍的通道提供后室和位于主阀的与后室相反的一侧的贮槽之间的连通。 先导阀和阻碍通道允许主阀从活塞的断路器关闭侧用加压液体快速打开。

公开(公告)号：US4380172A

公开(公告)日：1983-04-19

申请号：US236007

申请日：1981-02-19

Applicant: Imdad Imam ,  Leslie H. Bernd

Inventor： Imdad Imam ,  Leslie H. Bernd

IPC: G01H1/00 ,  G01N29/00

CPC classification number: G01H1/003

Abstract: A method is disclosed by which incipient cracks are detected in the rotor of a fluid powered turbine while the turbine is on-line and running under substantially normal load. In a preferred form of the invention, vibrations are monitored in the rotor and signature analysis of the normal background vibration pattern is obtained to establish the spectral content of the normal vibration signal. The turbine rotor is then transitorily perturbed, preferably by changing the temperature of the motive fluid (steam temperature is changed for example in a steam driven turbine), and the signature analysis is again performed to determine changes in the vibration pattern. An increase in the amplitude of the fundamental frequency and the appearance and increase in amplitude of higher harmonics following rotor perturbation is indicative of the presence and size of a crack in the rotor.

Abstract translation: 公开了一种在涡轮机在线并且在基本正常负载下运行的情况下，在流体动力涡轮机的转子中检测到初始裂纹的方法。 在本发明的优选形式中，在转子中监测振动，并获得正常背景振动模式的签名分析以建立正常振动信号的频谱含量。 然后，涡轮转子优选通过改变运动流体的温度（蒸汽温度例如在蒸汽驱动的涡轮机中改变）来进行静态扰动，并且再次执行签名分析以确定振动模式的变化。 基波频率的增加以及转子扰动之后的高次谐波的出现和振幅的增加表明转子中裂纹的存在和尺寸。

公开(公告)号：US4192981A

公开(公告)日：1980-03-11

申请号：US848512

申请日：1977-11-04

Applicant: Philip Barkan ,  Imdad Imam

Inventor： Philip Barkan ,  Imdad Imam

IPC: H01H33/664 ,  H01H33/66

CPC classification number: H01H33/6646

Abstract: A high current interrupter is enclosed in a sealed enclosure having a pair of axially disposed contacts therein, one stationary and one movable relative thereto. An array of rods or electrodes is mounted near each end of the enclosure, the rods extending toward the opposite end of the enclosure and terminating at a free end short of the opposite end. The arrays are similar in pattern and thus each rod lies between and is spaced from rods extending from the opposite enclosure end. Each array of rods is mounted in a pair of thin spaced mounting plates, which are connected together near the centers thereof. The plates engage the rods near the end opposite the free end, both plates being electrically conductive and being connected electrically to one of the two electrical contacts within the enclosure.

Abstract translation: 高电流断流器被封闭在密封的壳体中，其中具有一对轴向设置的触点，一个固定的并且一个相对于其可移动。 杆或电极的阵列安装在外壳的每个端部附近，杆朝向外壳的相对端延伸并且终止于相对端短的自由端。 阵列的图案类似，因此每个杆位于从相对的封闭端延伸的杆之间并与其间隔开。 每个棒阵列安装在一对薄的间隔开的安装板中，它们在其中心附近连接在一起。 板接近与自由端相对的端部附近的杆，两个板是导电的并且与壳体内的两个电触头中的一个电连接。

公开(公告)号：US4166937A

公开(公告)日：1979-09-04

申请号：US907220

申请日：1978-05-18

Applicant: Imdad Imam ,  Philip Barkan

Inventor： Imdad Imam ,  Philip Barkan

IPC: H01H33/34 ,  H01H35/38

CPC classification number: H01H33/34

Abstract: This operating system comprises a fluid motor having a piston, a breaker-opening space at one side of the piston, and a breaker-closing space at its opposite side. An accumulator freely communicates with the breaker-opening space for supplying pressurized fluid thereto during a circuit-breaker opening operation. A normally-closed valve located on the breaker-closing-side of the piston is openable to release liquid from the breaker-closing space so that pressurized liquid in the breaker-opening space can drive the piston in an opening direction. Means is provided for restoring the valve to its closed position following the circuit-breaker opening operation. An impeded passage affords communication between the accumulator and the breaker-closing space to allow pressurized liquid to flow from the accumulator to the breaker-closing space and develop a pressure therein substantially equal to accumulator pressure when the valve is restored to closed position following breaker-opening. This passage is so impeded that the flow therethrough from the accumulator into the breaker-closing space is sufficiently low during initial opening motion of the piston through a substantial portion of its opening stroke as to avoid interference with said initial opening motion of the piston.

Abstract translation: 该操作系统包括具有活塞的流体马达，活塞一侧的断路器开口空间以及在其相对侧的断路器闭合空间。 在断路器打开操作期间，蓄能器与断路器开口空间自由地连通以供应加压流体。 位于活塞的断路器关闭侧的常闭阀是可开启的，以从断路器关闭空间释放液体，使得断路器开口空间中的加压液体能够沿打开方向驱动活塞。 提供了用于在断路器打开操作之后将阀恢复到其关闭位置的装置。 妨碍的通道提供蓄能器和断路器关闭空间之间的连通，以允许加压液体从蓄能器流动到断路器闭合空间，并且当阀在断路器 - 闭合空间之后恢复到关闭位置时，其中的压力基本上等于蓄能器压力， 开放 该通道被阻止，使得在活塞通过其打开行程的大部分的初始打开运动期间从蓄能器进入断路器关闭空间的流量足够低，以避免与活塞的所述初始打开运动的干涉。

公开(公告)号：US4118613A

公开(公告)日：1978-10-03

申请号：US810663

申请日：1977-06-27

Applicant: Philip Barkan ,  Imdad Imam

Inventor： Philip Barkan ,  Imdad Imam

IPC: H01H33/34 ,  H01H35/38

CPC classification number: H01H33/34 ,  H01H2033/308

Abstract: This hydraulically-actuated operating system comprises a cylinder, a piston movable therein in an opening direction to open a circuit breaker, and an accumulator for supplying pressurized liquid to a piston-actuating space within the cylinder. A normally-closed valve between the accumulator and the actuating space is openable to allow pressurized liquid from the accumulator to flow through the valve into the actuating space to drive the piston in an opening direction. A vent is located hydraulically between the actuating space and the valve for affording communication between said actuating space and a low pressure region.Flow control means is provided for restricting leakage through said vent to a rate that prevents said leakage from substantially detracting from the development of pressure within said actuatng space during the period from initial opening of the valve to the time when said piston has moved through most of its opening stroke. Following such period and while the valve is still open, said flow control means allows effective leakage through said vent. The accumulator has a limited capacity that results in the pressure within said actuating space decaying promptly to a low value as a result of effective leakage through said vent after the piston has moved through a circuit-breaker opening stroke and while the valve is in its open state. Means is provided for resetting the valve to its closed state in response to said pressure decay in the actuating space.

Abstract translation: 这种液压致动操作系统包括一个气缸，一个在开启方向上可以打开断路器的活塞，以及用于将加压液体供应到气缸内的活塞致动空间的蓄能器。 蓄能器和致动空间之间的常闭阀可打开以允许来自蓄能器的加压液体流过阀进入致动空间以沿打开方向驱动活塞。 排气口液压地位于致动空间和阀之间，以提供所述致动空间和低压区域之间的连通。