5results about "Speed/accelaration control without auxillary power" patented technology

A "hydraulic rotating machinery" ("HRM") system provides optimal energy efficiency over a very wide conditions of service ("COS") range by configuring a plurality of variable speed HRMs in a "cluster." The HRMs are interconnected by one or more valves that can be actuated by a controller to configure and vary a flow path through which a process fluid flows from an inlet to an outlet. By actively selecting which of the HRMs are included in the flow path, the interconnections therebetween, and the operating speeds thereof, the controller ensures that the HRM cluster continues to operate at optimal efficiency as the COS fluctuates over a very wide range. The HRMs can be identical to each other, or can vary in design. The HRM system can be implemented for storage and retrieval of green energy. The controller can also monitor the health of the cluster and / or of the associated process.

A gimbal control method and apparatus, and a gimbal, a storage medium and a program product. The gimbal control method comprises: in response to a power-off or sleep instruction for a gimbal, generating a torque instruction for an electric motor of the gimbal on the basis of a control parameter of the gimbal when same is powered off or enters a sleep, wherein the control parameter is related to the position of a photographic device on the gimbal, and the torque instruction at least comprises a torque direction (S101); and on the basis of the torque instruction, controlling the photographic device to gradually descend at the moment when the gimbal is powered off or enters a sleep (S102).

The water sport apparatus has: a propulsion system that is configured to propel the water sport apparatus, the propulsion system having: an impeller; and a drive system that is configured to drive the impeller to propel the water sport apparatus. The water sport apparatus has a controller for controlling the propulsion system, the controller comprising a sensor system; wherein the controller is configured to: determine a speed estimate that is indicative of a speed of the water sport apparatus using sensor data determined using the sensor system; compare the speed estimate to a speed threshold; and activate the drive system to drive the impeller in response to the speed estimate being equal to or greater than the speed threshold.

A “hydraulic rotating machinery” (“HRM”) system provides optimal energy efficiency over a very wide conditions of service (“COS”) range by configuring a plurality of variable speed HRMs in a “cluster.” The HRMs are interconnected by one or more valves that can be actuated by a controller to configure and vary a flow path through which a process fluid flows from an inlet to an outlet. By actively selecting which of the HRMs are included in the flow path, the interconnections therebetween, and the operating speeds thereof, the controller ensures that the HRM cluster continues to operate at optimal efficiency as the COS fluctuates over a very wide range. The HRMs can be identical to each other, or can vary in design. The HRM system can be implemented for storage and retrieval of green energy. The controller can also monitor the health of the cluster and / or of the associated process.