A method of forming a balanced rotor blade assembly includes measuring a weight of a plurality of sub-components of the rotor blade assembly excluding a core. A configuration of a core of the rotor blade assembly is determined. In combination, the core and the plurality of sub-components achieve a target weight distribution and moment. The core is then fabricated and assembled with the plurality of sub-components to form a rotor blade sub-assembly.

A method of forming a balanced rotor blade assembly includes measuring a weight of a plurality of sub-components of the rotor blade assembly excluding a core. A configuration of a core of the rotor blade assembly is determined. In combination, the core and the plurality of sub-components achieve a target weight distribution and moment. The core is then fabricated and assembled with the plurality of sub-components to form a rotor blade sub-assembly.

A method of forming a balanced rotor blade assembly includes measuring a weight of a plurality of sub-components of the rotor blade assembly excluding a core. A configuration of a core of the rotor blade assembly is determined. In combination, the core and the plurality of sub-components achieve a target weight distribution and moment. The core is then fabricated and assembled with the plurality of sub-components to form a rotor blade sub-assembly.

A method of forming a balanced rotor blade assembly includes measuring a weight of a plurality of sub-components of the rotor blade assembly excluding a core. A configuration of a core of the rotor blade assembly is determined. In combination, the core and the plurality of sub-components achieve a target weight distribution and moment. The core is then fabricated and assembled with the plurality of sub-components to form a rotor blade sub-assembly.

The present application discloses a method for detecting an abnormity in a ray source in a CT system, comprising obtaining scanning data obtained from at least two scans that are performed by a medical device, the medical device including a ray source configured to generate a plurality of rays and a detector configured to detect the plurality of rays; determining, based on a difference of the scanning data, a status characteristic index of the ray source; and determining whether abnormity exists in the ray source based on the status characteristic index.

The present application discloses a method for detecting an abnormity in a ray source in a CT system, comprising obtaining scanning data obtained from at least two scans that are performed by a medical device, the medical device including a ray source configured to generate a plurality of rays and a detector configured to detect the plurality of rays; determining, based on a difference of the scanning data, a status characteristic index of the ray source; and determining whether abnormity exists in the ray source based on the status characteristic index.

The present disclosure provides methods and systems for providing a lateral center of gravity of an aircraft on an aircraft display. A fuel distribution in the aircraft fuel tanks is determined. A lateral center of gravity of the aircraft is determined based on the fuel distribution. The lateral center of gravity is sent to the aircraft display. The present disclosure further provides an aircraft display for displaying the lateral center of gravity of an aircraft.

Disclosed is a radial fault simulation test system for rotary mechanical equipment. The system comprises a simulation test bed, a data collection system and a control system, wherein the data collection system is used for collecting the operation state data of a rotating shaft; and the control system is used for receiving the data collected by the data collection system, analyzing and processing the data, and controlling the simulation test bed according to an analysis result. The system adopts a modular design, can simulate the operation state and the fault type of the rotary mechanical system under different rotation conditions and structural forms, can realize a simulation test of the rotary mechanical system under different fault states, and can preferably ensure the accuracy of the test performance of the simulation test.

A fan of the invention includes an impeller having a plurality of blades and rotating around a rotation axis, and at least one balance weight having at least one claw portion and attached to the impeller to correct the center of gravity of the impeller. The impeller has a circumferential convex portion formed along the circumferential direction, and on which the claw portion is hooked to restrict a range of movement of the balance weight in the radial direction of the impeller, and at least one radial concave-convex portion formed along the radial direction, and on which the claw portion is hooked to restrict the range of movement of the balance weight in the circumferential direction of the impeller.

A method for determining stability of a vehicle having a load suspended from the vehicle is provided. The method can include obtaining measurements from a plurality of sensors positioned on the vehicle, obtaining a measurement from a vehicle accelerometer operative to determine an inclination of the vehicle, determining a position of the load suspended from the vehicle, determining a slung load of the load suspended from the vehicle, using the determined slung load and the determined position of the load suspended from the vehicle, determining tipping moments acting on the vehicle, determining righting moments acting on the vehicle and determining a tipping stability based on the determined tipping moments and determined righting moments.