46 results about "Airborne early warning" patented technology

The invention discloses an intelligent skin antenna electric compensation method based on an embedded fiber bragg grating. The method is characterized by comprising the steps that the fiber bragg grating is firstly embedded into a skin antenna structure, then sensed strain is converted into deformation displacement through a strain-displacement transfer matrix, finally the excitation current of a skin antenna is modified through sensed deformation displacement, and therefore the aim of the influence of compensation structure deformation on electric performance is achieved. The method has the advantages that the mechanical property of the skin antenna structure can be monitored in real time, health monitoring on the structure is achieved, and the problem that the electric performance of the skin antenna is lowered due to structural vibration and deformation on active service can be solved through the method. A fiber bragg grating sensor is light in mass and can be embedded into the structure, the pneumatic and invisible performance of an aircraft is not influenced, the fiber bragg grating sensor can be applied to the fields of airborne early warning aircrafts, warcrafts, unmanned aerial vehicles, invisible warships and the like, and the key technology for guaranteeing the reliable service of the performance of the skin antenna is achieved.

The invention discloses a stepping force sensor for an airplane. The stepping force sensor comprises a stepping force sensor body connected to a stepping pedal and a stepping joystick system. The middle of the stepping force sensor body is of a radial plate structure, resistance strain gauges are pasted on the outer surface of the stepping force sensor body, two paths of Wheatstone bridges are formed by every two resistance strain gauges, and the Wheatstone bridges formed by the resistance strain gauges are connected with electric connectors. The stepping force sensor body is connected to thestepping pedal and the stepping joystick system, and by means of deformation generated by the stepping force sensor body in the force transmission process, control force applied to the stepping pedalby an airplane driver in the airplane driving process can be directly measured through the Wheatstone bridges formed by the resistance strain gauges. the maneuverability and flexibility of the airplane are improved, meanwhile potential safety hazards generated when the airplane flies are reduced, the safety guarantee capacity of the airplane in the flight process is improved, the measuring precision is high, the structure is simple, the design is reasonable, and the stepping force sensor can be suitable for various airborne early warning aircrafts.

The invention discloses a method for estimating parameters of a maneuvering target based on acceleration compensation, which comprises the following steps: 1) performing acceleration compensation on the clutter-suppressed data received by an airborne early warning radar; 2) performing fast Fusion on the acceleration-compensated signal Get the maximum amplitude value corresponding to the fast Fourier transform spectrum, and write down the maximum amplitude value and its corresponding Doppler frequency; 3) Compare the maximum amplitude value corresponding to the fast Fourier transform spectrum, and select the maximum value , and save its corresponding Doppler frequency, and then obtain the estimated initial velocity and acceleration of the maneuvering target. In the case of the number of pulses transmitted within one CPI of the airborne early warning radar, the present invention has significantly improved parameter estimation accuracy compared with the FRFT method, and the calculation speed is faster, and the parameter estimation performance is closer to the CRB boundary, which is beneficial to engineering realization. Therefore, the present invention can solve the problem of low accuracy under short-term conditions in existing air maneuvering target parameter estimation algorithms.

The invention discloses an airborne early warning radar clutter suppression method based on auxiliary channels. The method includes: obtaining three-dimensional echo data received by an airborne early warning radar, obtaining a clutter ridge of the three-dimensional echo data, and thereby obtaining two-dimensional echo data; respectively obtaining num auxiliary channels and num search channels according to the clutter ridge of the three-dimensional echo data, obtaining spatial domain frequency vectors corresponding to the num auxiliary channels and time domain frequency vectors corresponding to the num auxiliary channels, obtaining a dimension-reduction matrix corresponding to the num auxiliary channels and a matrix corresponding to the num search channels in sequence, and thereby obtaining a dimension-reduction matrix for optimizing the auxiliary channels and a conversion matrix based on the auxiliary channels; respectively performing dimension-reduction processing of the two-dimensional echo data and the matrix corresponding to the num search channels, obtaining the echo data after dimension reduction and search channel guiding vectors after dimension reduction, obtaining filtering vectors after dimension reduction, performing clutter suppression processing of the matrix of the num search channels, and obtaining a distance Doppler graph.

The invention provides a harbor lifting machinery operation safety machine-mounted early warning system including a data acquisition layer, a data transmission layer and an industrial control computer; the industrial control computer includes a data acquisition interface, a data monitoring module and an early warning module; the data acquisition layer is used for acquiring a monitoring value of monitored harbor lifting machinery, and transmitting the monitoring value to the data acquisition interface of the industrial control computer through the data transmission layer; the data monitoring module is used for setting an early warning value for each monitoring parameter, and if one monitoring value exceeds the early warning value, alarming is carried out through the early warning module. The harbor lifting machinery operation safety machine-mounted early warning system can comprehensively and effectively monitor the harbor lifting machinery operation safety condition, and achieves effective long-term health monitoring on the harbor lifting machinery.

The invention relates to a jet propulsion and power output integrated system, and belongs to the field of aero engines. The jet propulsion and power output integrated system comprises a jet driving generator, a power controller, a set of accumulators, more than one electric drive jet engine, and a plurality of other electric devices. The jet driving generator is used for generating electricity, the accumulators are used for storing electrical energy, the power controller is used for controlling and coordinating electric energy distribution, the electric drive jet engine is used for propelling an airplane to move forward, the electric energy generated by the jet driving generator is used for driving the electric drive jet engine and other electric devices after being controlled, coordinated and distributed by the power controller, and the power controller can better control and coordinate the electric energy distribution through charging and the discharging of the accumulators. The jet propulsion and power output integrated system has the advantages that the electric drive jet engine is driven by the electric power without a turbine, the difficulty of production and manufacture is reduced, weight is reduced significantly, efficiency is improved greatly by the adoption of the method that electric energy is output by the jet driving generator, and it is possible that airborne early warning aircrafts and laser weapon planes become bigger and stronger.