32results about How to "Improve power-to-mass ratio" patented technology

The invention relates to a master-slave type electromechanical servo cooperative motion control system, and relates to the field of aerospace thrust vector control electromechanical servo. The system aggregates signals, such as a bus instruction of a control system, linear displacement feedback of a master actuator and linear displacement feedback of a slave actuator; according to the swing angle of a spray tube, the corresponding telescopic lengths of the master and slave actuators and the accelerated factor and the acceleration factor of master and slave motion tracks are calculated in real time; a real-time motion track plan of the master and slave actuators is realized; an instruction signal of the master actuator is output in real time; a master-slave servo control driver completes inversion control of a direct-current power supply on a guided missile through a motor space vector control algorithm; a servo motor drives an electromechanical transmission mechanism to act a load, so that the purpose of controlling a thrust vector is achieved; the characteristic that synchronous control is strictly realized by master-slave cooperation is realized; furthermore, a basic technology is relatively matured and easy to realize; high integration and cooperative motion control of the system are realized; and thus, the technical problem that the spray tube is structurally damaged due to super-swing of the spray tube through a two-channel independent control method can be solved.

The invention discloses a method for preparing an ultra-thin flexible crystalline silicon battery. The method introduces a CFZ, MCZ, or FZ silicon wafer as a substrate, and prepares a textured sheet with a thickness of less than 100 μm through texturing and thinning, and adopts a conventional high-temperature diffusion method. Prepare the PN junction, after cleaning, plate Al2O3 as the back passivation film by microwave flat plate PECVD, and coat the front and rear surfaces of the silicon wafer with SiNx anti-reflection film and protective film. Improve the preparation of aluminum back conductive layer and front and rear electrodes with extremely small thickness of aluminum paste by screen printing method, and form ultra-thin and high-efficiency crystalline silicon cells with excellent electrical properties after sintering, and use laser cutting to form small-sized components that are easy to package and have high reliability Battery. The ultra-thin flexible new high-efficiency crystalline silicon battery prepared by the invention can be completed in most of the process flow on the conventional crystalline silicon battery production line, has a high power-to-mass ratio, is suitable for low-altitude aircraft, has low preparation cost, and has broad application prospects.

The invention relates to a system for charge air cooling for an internal combustion engine (2) based on an engine family, wherein an intake module (8) is arranged between a throttle valve (7) and a combustion chamber (3). A first cooling device (14) of the system is shaped to be structurally integrated into the intake module (8). Furthermore, in accordance with the system, a second cooling device (17, 19) is available, which supplements the first cooling device (14) and which is designed to pre-cool charge air before said charge air enters the intake module (8) and which is adapted for use with at least one engine model of the engine family. The second cooling device is intended for top engine types and can be arranged between the throttle valve (7) and a charge air compressor (5).

The invention provides a W-type loudspeaker which refers that the cross section of the overall structure of the W-type loudspeaker is W-shaped. A W-shaped basin support is a basin-shaped support formed by an iron sheet via integral stamping. The periphery of the W-shaped basin support is provided with an external taper ring, an internal tape cover is arranged in the middle and an annular magnetic-conductive cavity is arranged at the lower end. The internal wall of the annular magnetic-conductive cavity is provided with an annular strong permanent magnet. A W-shaped paper cone is a basin-shaped voice diaphragm formed by paper material via integral processing. The periphery of the W-shaped paper cone is provided with a tape ring, a tape cover is arranged in the middle, and an annular installing slot is arranged at the lower end. A framework voice coil is adhered in the annular installing slot. The W-shaped structure is adopted so that an elastic wave plate of a common loudspeaker is enabled to be a taper paper cone which can stabilize the position of the voice coil and can also generate sound, power of the voice coil can be maximized, mass of a vibration component can be minimized, the performance index of the loudspeaker can be effectively enhanced, the improved magnetic circuit system is simple and low in total weight and thus advantages are obvious.

The invention discloses a novel engine which comprises two shaft levers, a plurality of air cylinders, pistons and a casing, wherein the two shaft levers are arranged on a central axis and are symmetrical up and down; the plurality of air cylinders are uniformly distributed around the two shaft levers; the pistons are arranged in the air cylinders; the casing encircles the exteriors of the air cylinders and is rotatably connected with the air cylinders in a sealing mode, and the casing is connected with the shaft levers; the pistons are provided with piston rods; the piston rods are connected with two connecting blocks which are symmetrical up and down, and the axle centers of the two connecting blocks deviate the central axis; the connecting points of the connecting blocks and the piston rods are symmetrical relative to the axle centers of the connecting blocks; the axle centers of the upper and lower connecting blocks are respectively connected with the upper and lower shaft levers through connecting parts; and the two symmetrical ends of the casing relative to the central axis are respectively provided with a cooling material inlet, a heating material outlet and a cooling material outlet and a heating material inlet. The engine has a simple structure, is convenient to use, is high in efficiency, low in noise, less in pollution and low in operating cost is low, and is suitable for various energy sources; and because continuous combustion is adopted, the fuel combustion efficiency is higher, and the engine is suitable for the fuel with higher impurity content.

The invention discloses a transmitting antenna system of a space solar power station. The transmitting antenna system is funnel-shaped on the whole. The transmitting antenna system is characterized in that the funnel-shaped transmitting antenna system is formed by splicing and assembling a plurality of oblique curved structure units; each oblique curved structure unit comprises a supporting frame, a photovoltaic cell layer and a transmitting antenna layer mounted at the inner side of the supporting frame, and a radiation panel layer mounted at the outer side of the supporting frame, wherein the photovoltaic cell layer is disposed on the transmitting antenna layer; and each radiation panel layer comprises an oblique curved panel, an oscillator, a phase shifter, an amplifier, a power divider and connecting cables, wherein the oscillator, the phase shifter, the amplifier and the power divider are mounted on the oblique curved panel, and the shape of the oblique curved panel is consistent with a Bezier curve. The transmitting antenna system has the advantage that by adopting the oblique curved structure units, the problem of heat radiating is solved, the power-to-mass ratio of the system is improved, the problem that the requirement on the angle of incident sunlight is strict is solved, and the difficulty of focusing system design is reduced.

The invention discloses a high-loudness vehicle-mounted alarm. The high-loudness vehicle-mounted alarm consists of an alarm machine box and a high-power speaker, wherein the high-power speaker is formed to a compressive sounding head by a W-shaped basin frame, an annular magnetic conducting cavity, an annular strong permanent magnet, a W-shaped sound film, a skeleton sound ring and a W-shaped end cover; a reflective horn is mounted on the compressive sounding head; the W-shaped sound film is equivalent to one sound ring to push two sound films, so that the effective vibrating area of the sound film is enlarged; a conical structure of the W-shaped sound film is excellent in rigidity and light in weight; the sound ring of a center tap is directly matched and connected with an audio power amplifier output circuit; an improved magnetic circuit system is simple in structure, strong in magnetism and light in weight; in the audio power amplifier circuit, upper and lower field effect tubes are connected to A and B type push-pull output circuits having common drain; the negative feedback is deep; the amplifier tone quality is improved; the amplifier stability is improved; the field effect tubes are high in output current and low in loss; a vehicle power supply with low voltage of 12 V is only used for generating an electroacoustic power above 500 W; and the high-power speaker is driven to give a high-loudness alarm sound.

The invention discloses a rotary energy transmission device, which mainly solves the problems of unstable electrical parameters, difficult integration of three-phase coils and unbalanced self-inductance and leakage inductance of three-phase coils in the prior art. The device includes two sets of coils (1, 2). , two PCB boards (5, 6) and fixing parts (4), the transmitting coil (1) is embedded in the transmitting PCB board (5), the receiving coil (2) is embedded in the receiving PCB board (6), and the two PCBs The fixing members (4) on the board are all provided with magnetic conductors, respectively forming a transmitting end and a receiving end. Each PCB board is a circular multi-layer structure, on which there are mounting holes for the magnetic conductors and fixing holes for the insertion of the fixing parts, and are evenly arranged on the PCB board in three circles: inner, middle and outer. . The two coil-embedded PCB boards are isolated by air, the invention balances the self-inductance and leakage inductance of the three-phase coil, improves the safety and reliability of energy transmission, and can be used in space solar power stations or ground energy transmission occasions.

An energy-efficient topological system based on wireless power supply on the rocket belongs to the field of rocket power supply and distribution technology. It adopts the composite bus full regulation technology and is suitable for power systems that require high bus voltage stability. Its advantage is that it is not affected by battery voltage changes. , The voltage at the power supply outlet is stable and the load stability is good. It is especially suitable for the centralized power supply system. It can realize the independent charge and discharge management of the power supply on the arrow. Combined with the wireless energy transmission ground power supply interface, it embodies the design concept of smart rockets.