3 results about "Ejection velocity" patented technology

This application belongs to the field of electromagnetic catapult technology, and relates to a method and system for controlling the launch speed of an electromagnetic catapult. The method includes: acquiring the separation moment and velocity of the aircraft during its acceleration from the catapult platform to its detachment; establishing the aircraft's dynamic equations and obtaining the real-time velocity equations; acquiring the electromagnetic catapult parameters and aircraft parameters; constructing the velocity state equations of the electromagnetic catapult and obtaining the velocity observation vector; obtaining the velocity fusion equation based on the velocity observation vectors and the velocity state equations of the electromagnetic catapult; constructing a Kalman filter; using the velocity observation vectors as the filtering observations; estimating the velocity error of the electromagnetic catapult; and providing velocity feedback based on the estimation results. This method can meet the needs of various aircraft with different launch speeds.

The application belongs to the technical field of electromagnetic launching aircraft, and relates to an online speed measurement feedback control method and system for an electromagnetic launching aircraft. The method comprises the following steps: acquiring electromagnetic launcher parameters and aircraft parameters, constructing an output speed equation of the electromagnetic launcher, constructing an output speed equation of the aircraft, and constructing a speed state equation of the electromagnetic launching aircraft; obtaining a speed observation vector according to the output speed equation of the electromagnetic launcher and the output speed equation of the aircraft; obtaining a speed fusion equation according to the speed observation vector and the speed state equation of the electromagnetic launching aircraft, constructing a Kalman filter, taking the speed observation vector as a filter observation, estimating a speed error of the electromagnetic launching aircraft, and performing speed feedback according to the estimation result. The method can meet the needs of different launching speeds of various aircrafts and improve the control precision.

The invention belongs to the technical field of aircraft protection and lifesaving, and provides an air bag type head and neck protection device inflation opportunity control method and system.The method comprises the following steps that the seat ejection channel cleaning mode, the ejection speed and the ejection number are obtained; an air bag inflation control mode is automatically matched according to the seat ejection channel cleaning mode and the ejection number; and after the inflation control mode is confirmed, the inflation time of the seat lateral air bag and the pillow rear air bag is adjusted according to the ejection speed obtained in real time. The problems of different ejection channel cleaning modes, ejection speeds and air inflation time control of the air bag head and neck protection device during ejection lifesaving of multiple passengers are solved, and the protection effect on the heads and the necks of pilots is improved.