Abstract: A pumping system is provided. The pumping system includes an output conduit, a first sensor, a second second sensor, a feedforward active controller, and a fluid flow normalizer (FFN). The output conduit is associated with an output of a positive displacement pump. The first sensor is configured to measure a fluid flow characteristic (FFC) within the output conduit. The second sensor is configured to measure a phase of the positive displacement pump. The feedforward active controller is configured to receive information related to the FFC, receive information related to the phase of the positive displacement pump, and determine an FFC variability value. The first fluid flow normalizer (FFN) is configured to at least one of add fluid to the output of the positive displacement pump and remove fluid from the output of the positive displacement pump in response to a signal from the feedforward active controller.

Abstract: A riser tensioner system has a riser support device, an actuator, and a bearing assembly disposed between the riser support device and the actuator. The bearing assembly is configured to provide at least five degrees of freedom of movement of the riser support device relative to the actuator.

Abstract: Embodiments relate generally to gimbal bearings for installation of a riser string. Gimbal bearing embodiments comprise a top ring and a bottom ring, with a plurality of high capacity laminate bearings located therebetween, the high capacity laminate bearings comprising at least one of natural rubber and a marker layer. Each high caparity laminate bearing might comprise alternating layers of steel shims and elastomeric elements bonded together via adhesive. Embodiment designs provide for improved gimbal bearing characteristics, which may improve the effective lifespan of such gimbal bearings.

Abstract: A pumping system includes an output conduit associated with an output of a positive displacement pump, a first sensor configured to measure a fluid flow characteristic (FFC) within the output conduit, a second sensor configured to measure a phase of the positive displacement pump, a feedforward active controller configured to receive information related to the FFC, receive information related to the phase of the positive displacement pump, and determine an FFC variability value, and a first fluid flow normalizer (FFN) configured to at least one of add fluid to the output of the positive displacement pump and remove fluid from the output of the positive displacement pump in response to a signal from the feedforward active controller.

Abstract: It is an object of the present invention to reduce a playback distortion and make it possible to output a large volume sound in a low frequency area, without increasing the diameter of subwoofer or woofer. A speaker device comprises a speaker unit, a diaphragm of the speaker unit disposed at an opening of a baffle plate, and a compression board disposed opposite to a radiation surface of the diaphragm in a manner such that a predetermined interval is formed between the compression board and the baffle plate.