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 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.