| In the field of ammunition fuses and other weapons systems,a small power source using environmental energy to generate electricity is required.With the development trend of fuze electronicization and intelligence,There are more and more electronic circuits of various functions in modern fuzes,insufficient power supply and single-type problems of physical power for low-power fuzes are becoming more prominent,and fuze power and its power management issues have also become one of the bottlenecks in inhibiting the development of fuze technology.Therefore,taking the fuze application as the background,researching the power management and control technology of the physical power generation of the low-power fuze will make full use of electric energy and effectively use the fuze environment to control the power supply,it is of great significance to the development of fuze technology and its application.Taking the magnetic recoil generator that generates electricity in the borehole as the research object,the pressure value and curve in the bore of the recoilless artillery piercing projectile fuze were obtained through numerical calculation,and the natural frequency of the magnetic recoil generator was obtained.Based on this,simulation of power generation in the bore of a magnetic squat generator was performed,and its output voltage and energy conversion efficiency were estimated.A power supply control scheme for the energy storage capacitor of a fuse circuit based on a miniature inertial switch was proposed.The bore pressure curve obtained by numerical simulation and the simulated output voltage of the power generation in the bore of the magnetic recoil generator provide test prototypes and data for the power control technology verification test of the physical power source of the bore generating fuze.A newly-developed air-borne acoustic piezo-electric generator for external ballistics was used as the research object.The shock wave phenomenon of the oncoming airflow on the external ballistics was analyzed,and a mechanical rectifier inlet that met the transition conditions of the surface layer was determined.The power control technology verification test of the physical power source of the power generation fuze provides a test prototype.Developed a low-dropout gallium nitride(GaN)rectifier bridge that is commonly used in power supply circuits of magnetic recoil generators and air-borne acoustic piezoelectric generators,and designed a passive synchronous energy harvesting circuit for low-dropout gallium nitride(GaN)rectifier bridges.A low-dropout gallium nitride(GaN)rectifier bridge chip was fabricated.The air blower power generation verification test of a newly developed air-borne acoustic piezoelectric generator was carried out,the results verified that the acoustic pressure,open circuit voltage,matched load,and displacement frequency of the piezoelectric vibrator at the bottom of the resonant cavity of the piezoelectric transducer under acoustic excitation were consistent.With the increase of the airflow inflow speed,the sound pressure and the displacement of the piezoelectric vibrator also increase.Based on this,a passive low-energydifference gallium nitride(GaN)rectifier bridge passive synchronous energy harvesting circuit was directly connected in parallel to the power supply side of the magnetic squat generator and the air-induced acoustic piezoelectric generator.Through static and dynamic comparison tests,The results show that the output power of the low-dropout gallium nitride(GaN)rectifier bridge is more than 75% higher than that of the ordinary Schottky SR560 rectifier bridge,and the conversion efficiency of the low-dropout gallium nitride(GaN)rectifier bridge is higher. |
