13 results about "Railgun" patented technology

The invention discloses a multi-stage electromagnetic railgun and a distributed energy injection system thereof, and relates to the technical field of electromagnetic railguns, the multi-stage electromagnetic railgun comprises an electromagnetic gun launching tube, a mounting plate is mounted at the bottom of the electromagnetic gun launching tube, a plurality of groups of isolation columns are mounted at the bottom of the mounting plate, and a circuit board is mounted at the bottom end of each isolation column; according to the multi-stage electromagnetic rail gun and the distributed energy injection system thereof, the distributed energy injection system composed of the main control module, the time sequence control and energy routing module and the distributed pulse forming module is combined with a plurality of independent magnet exciting coils wound in the axial direction of an electromagnetic gun launching tube in a segmented mode; accurate distribution and injection of energy according to a preset time sequence and a space sequence are realized. According to the system, marching type electromagnetic thrust waves can be formed in the electromagnetic gun launching tube, continuous and multi-stage acceleration is carried out on the armature, and therefore the outlet speed and launching efficiency of the projectile are remarkably improved, and meanwhile the controllability and energy utilization reasonability of the system are enhanced.

The present invention provides a modeling simulation and multi-field coupling analysis method for electromagnetic railgun system, comprising: for electromagnetic railgun, respectively building mathematical model of pulse shaping unit, mathematical model of armature impedance, mathematical model of rail and dynamic model of armature of electromagnetic railgun system; by using modularization method, forming simulation model of the electromagnetic railgun based on each built model; carrying out coupling simulation on current density and magnetic induction intensity distribution of the simulation model of the electromagnetic railgun, and analyzing coupling action and distribution characteristics of electromagnetic field in launching process of the electromagnetic railgun and influence of the electromagnetic field on temperature field distribution; based on the analysis result, determining positions where severe ablation appeared and electric contact arcing easily generated on the electromagnetic railgun, and carrying out preventive and maintenance measures.

The invention discloses an H-shaped armature of an electromagnetic rail gun, and belongs to the technical field of electromagnetic emission. The wind power generation device comprises a windward front surface, a windward curved surface, a windward inner surface, a top surface, a bottom surface, side surfaces, a leeward front surface, a leeward curved surface and a leeward inner surface, the graphene film is characterized in that both the top surface and the bottom surface are coated with graphene. According to the invention, the stability in electromagnetic emission is better, the emission efficiency can be effectively improved, and the graphene coating is coated on the surface of the armature in combination with the shape, so that the armature can reach a higher average speed and has a better arc ablation resistance effect, and the armature also has a certain lubrication effect; the conductive filler can be used as a good interface conductive filler to improve the contact state of a pivot rail interface. Therefore, the problems of'planing ', 'ablation', 'adhesion ', 'transition' and the like in the electromagnetic gun launching process are further improved.

The invention discloses a material for an electromagnetic rail gun guide rail and a preparation method and application thereof, and belongs to the technical field of copper-based composite materials. The invention relates to a material for a guide rail of an electromagnetic rail gun. The material comprises a 5-20nm nano precipitated phase dispersed and distributed in a copper matrix; the MXene lamellas are continuously distributed on the grain boundary, and the nanometer MAX phase is distributed in the grain; and the nano precipitated phase, the MXene sheet layer and the nano MAX phase form a continuous reinforced network. The Cu-Ti-Be-Co alloy serves as a matrix, and unification of high strength and high conductivity is achieved through the synergistic effect of nanometer precipitated phase strengthening and MAX and MXene strengthening. The yield strength of the composite material reaches more than 700MPa and the conductivity is greater than or equal to 80% IACS (International Annealed Copper Standard) by regulating and controlling the interface combination of MAX and MXene with a matrix and the size and distribution of a nano precipitated phase, and the composite material is suitable for the fields of high-load electromagnetic guide rails, electromagnetic rail guns and the like.

The application discloses a preparation method of a copper-chromium-niobium-zirconium alloy for an electromagnetic railgun guide rail, and comprises the following steps: S1, the copper-chromium-niobium-zirconium alloy comprises Cr: 0.8-1.2%, Nb: 0.10-0.20%, Zr: 0.10-0.20%, and Cu: the balance, raw materials are prepared according to the element composition, then smelting is carried out, and a cylindrical ingot is cast; S2, the cylindrical ingot after the step S1 is subjected to homogenization annealing treatment; S3, the cylindrical ingot after the homogenization annealing treatment in the step S2 is subjected to hot extrusion; S4, the hot extruded profile after the step S3 is subjected to solid solution treatment; S5, the solid solution ingot after the step S4 is subjected to cold drawing / cold forging deformation treatment; S6, the semi-finished product after the step S5 is subjected to aging treatment, and the copper-chromium-niobium-zirconium alloy is obtained. Through the interaction between chromium, zirconium, niobium elements and the copper matrix, the strength and hardness of the alloy are greatly improved, and high-strength, high-conductivity and high-temperature resistance can be realized.

This invention discloses a simulation method, apparatus, equipment, and medium for an electromagnetic railgun. Compared to constant load parameter values, it employs a finite element method combined with equivalent circuit analysis. The rail is divided into N segments, and the armature is positioned at the end of the i-th segment. The current equivalent load parameters of the rail are updated based on the circuit parameters at each discrete time point, thereby approximating the true value of the equivalent load parameters segment by segment. The current equivalent load parameters are then substituted into the circuit and mechanical equations to calculate the discrete data when the armature is positioned at the end of the i-th segment. If i < N, let i = i + 1, and iterate the above simulation steps; if i = N, then fit all the calculated discrete data between the armature velocity and discrete time points to obtain continuous data between the armature velocity and time. It is evident that this invention corrects the equivalent load parameters whenever the armature moves a certain distance, thus simulating an electromagnetic railgun firing process that more closely approximates the real situation.

The present invention provides a modeling simulation and multi-field coupling analysis method for electromagnetic railgun system, comprising: for electromagnetic railgun, respectively building mathematical model of pulse shaping unit, mathematical model of armature impedance, mathematical model of rail and dynamic model of armature of electromagnetic railgun system; by using modularization method, forming simulation model of the electromagnetic railgun based on each built model; carrying out coupling simulation on current density and magnetic induction intensity distribution of the simulation model of the electromagnetic railgun, and analyzing coupling action and distribution characteristics of electromagnetic field in launching process of the electromagnetic railgun and influence of the electromagnetic field on temperature field distribution; based on the analysis result, determining positions where severe ablation appeared and electric contact arcing easily generated on the electromagnetic railgun, and carrying out preventive and maintenance measures.

The invention discloses a nano ceramic reinforced metal-based coating and a preparation method and application thereof, and belongs to the technical field of electromagnetic rail gun guide rail materials, a first NiCr alloy is used as a base coat, a second NiCr alloy with the first TiN ceramic phase content gradually increased is used as a transition layer, and a third NiCr alloy with the second TiN ceramic phase uniformly distributed is used as a protective layer. And the nano-ceramic reinforced metal-based coating is obtained through magnetron sputtering. The second NiCr alloy with the first TiN ceramic phase content gradually increased is deposited on the surface of the base layer to serve as the transition layer, continuous transition of the thermal expansion coefficient, the elastic modulus and the hardness between the coating and the substrate is achieved, and the coating has high bonding strength. The NiCr alloy is low in hardness and wear resistance, and a high-hardness TiN nitride nano ceramic phase is introduced into the NiCr alloy, so that multiple characteristics of electric conduction, heat conduction, wear resistance and arc ablation resistance of the coating material are realized, and the service life of the guide rail is prolonged.

This invention proposes a switchable-stage electromagnetic railgun system, comprising: a charging circuit module that converts low-voltage DC power into high-voltage DC power to charge an energy storage module; an energy storage module including primary and secondary energy storage capacitors; a discharging module that releases excess energy; an energy conversion and regulation module that realizes energy conversion between the primary and secondary energy storage capacitors; a launch execution module that utilizes the energy in the energy storage module to achieve the launch function of the electromagnetic railgun; and a control and monitoring module that, in conjunction with an MCU (microcontroller unit), realizes the switching between different system states. This invention can control the energy of each stage of the launch circuit, has a wider adjustment range and higher precision, and at the same time, fully utilizes the secondary energy storage capacitors in single-stage launch, improving the charging and discharging speed.

The invention belongs to the technical field of electromagnetic emission, and discloses an enhanced electromagnetic track emission device and method based on parallel coils, the device comprises tracks and an armature, the tracks are arranged on two sides of the armature in parallel, the tracks and the armature are used for conducting current, one side of each track is provided with a coil, and the coils are independently connected with the tracks. The head end and the tail end of the coil are electrically connected with the output end of the power control unit, a magnetic field generated after the coil is powered on is used for enhancing the magnetic field of the track and the electromagnetic driving force of the armature, the chamber-out speed and the launching efficiency of the electromagnetic launching device are improved, and the electrical contact performance of the armature and the track is remarkably improved by restraining a damage mechanism of a low-speed section. The service life of the rail is prolonged, the reliability and launching times of the whole electromagnetic launching device are fundamentally improved, the armature abrasion loss and the instantaneous peak temperature of the rail are accurately predicted through the enhanced rail gun launching performance prediction model, and the performance of the electromagnetic rail launching device under different working conditions can be pre-judged in advance.

A system which adjusts the muzzle energy of an adjustable velocity accelerator in response to signals from a connected rangefinder or imaging device. Embodiments of the invention may be used to enhance the safety of a less-lethal weapon system by automatically adjusting its muzzle energy to compensate for a target moving closer or further away, or preventing injury to an unintended third party who crosses into the line of fire at close range. The preferred embodiment relates to a portion of an active control system for a coilgun or railgun. Other embodiments may be applicable to precision targeting for defense / military applications, or integrating an identification friend-or-foe (IFF) system in combination with a rangefinder to reduce the risk of friendly fire incidents.

The application provides a variable load electromagnetic railgun launching test device, wherein the test device comprises a rail mechanism for providing a launching rail for an armature; a feeding mechanism for controlling the launching of the armature on the rail; an energy storage mechanism for storing the energy of the launching of the armature on the rail; and a loading mechanism for adjusting the rail spacing in the rail mechanism to realize the variable load launching of the armature in the rail mechanism. The application can realize the secondary reduction of the rail spacing, and can realize the secondary pre-tightening of the rail-armature after the rail wears.

The invention discloses a novel automatic electromagnetic gun technology, which relates to the fields of military affairs, spaceflight and the like, and is characterized in that the novel automatic electromagnetic gun technology has two control modes through voice control and camera control, and mainly comprises a coil, a 70PT16BI one-way silicon controlled rectifier, three 450V and 1000mu F capacitors, a boosting module, an STM32 single chip microcomputer and a movable chassis; according to the device, a mechanical wheel leg platform serves as a base, a holder is carried above the mechanical wheel leg platform, an electromagnetic gun multi-stage acceleration module and a camera automatic tracking module are loaded, a battery is loaded on the left side of the holder to supply power to a chip, a boost-buck module is arranged on the right side of the holder, and a mechanical wheel leg control module is arranged behind the holder to control the direction and movement. The module 1 is arranged behind the buck-boost module and comprises an electromagnetic gun launching control module and a capacitor charging control module, the electromagnetic gun launching control module and the capacitor charging control module are located right below, a platform is carried right above the mechanical wheel leg control module and the module 1, and two batteries are assembled to charge a capacitor and supply power to mechanical wheel legs respectively. A common mechanical switch is replaced by the one-way silicon controlled rectifier, accurate control over a circuit is achieved, infrared ray assistance is achieved, the hitting precision and effect are improved, remote control can be achieved, and safety is improved.