Research On Infrared Radiation Characteristics And Control Methods Of Midcourse Targets

With the rapid development and gradual improvement of modern optoelectronic technology and infrared guidance technology,the all-weather combat capability,high-precision guidance capability and target identification capability of various reconnaissance and guidance systems have been greatly enhanced and widely used in the military,forming a new generation of reconnaissance detection and precision guidance equipment,which poses a great threat to the battlefield survivability of weapons and equipment.The infrared decoys can be used to simulate infrared radiation characteristics similar to real targets,thereby reducing the probability of photoelectric systems detecting and identifying real targets,dispersing and consuming enemy precision-guided weapons,and achieving missile penetration.Therefore,the research on the control of infrared radiation characteristics of decoys has important application prospects and military significance.In this paper,the advantages and disadvantages of different infrared control measures for decoy camouflage were analyzed by establishing the calculation model of infrared radiation characteristics of midcourse ballistic missile and its profiling decoy.A variety of novel technologies of intelligent infrared decoy were proposed and the corresponding methods of infrared adaptive control of decoy was explored.Finally,the camouflage effects of the novel intelligent infrared decoy technologies under different trajectory and atmospheric window were studied.The specific content mainly includes the following aspects:1.Research on the calculation model of infrared radiation characteristics of midcourse targetThe midcourse ballistic missile and its decoy were taken as the research object.Aiming at the problem of infrared adaptive accurate control of missile decoy,considering the heat transfer between missile decoy and surrounding background and the internal heat transfer mechanism,the calculation models of missile decoy temperature and infrared radiation characteristics under various infrared control measures were established.The theoretical model of infrared radiation characteristics of midcourse targets was further improved.The advantages and disadvantages of each intelligent camouflage technology in application were analyzed,and a novel infrared decoy technology based on emissivity and temperature cooperative control and a novel infrared decoy technology based on PTC material thermal control were proposed respectively.2.Research on infrared adaptive adjustment of emissivity-temperature synergistic control decoy technologyConsidering the radiative heat flow changes of the decoy in the space environment and the difference in radiation characteristics from the real warhead,the parameters of the fuzzy PID control algorithm were designed based on the calculation model of the infrared radiation characteristics of the space target.According to the electrochromic materials used in the design of the decoy and the performance parameters of the thin film resistance,a control strategy based on emissivity and supplemented by temperature control was proposed.An infrared adaptive control model for cooperative control of emissivity and temperature with constraints was designed.The infrared adaptive control results of missile decoy with different trajectory and different atmospheric windows were simulated.And the differences in infrared camouflage effects were analyzed by comparing the traditional thermal control methods and control algorithms.3.Research on the calibration of emissivity-temperature synergistic control decoy technologyA scaled model of the profiling decoy was established for the mid-course ballistic missile,and all modules including the principle prototype were integrated.The design content mainly included: the size and arrangement design of the principle sample,the design of the wiring scheme,the design of the bait sealing scheme and the design of the multi-channel control module.On the basis of the developed electrochromic material and the multi-channel voltage and temperature control module,the principle prototype was developed by integrating each module.Based on the infrared adaptive control model of the emissivity and temperature synergistic control decoy technology,the infrared control scheme of the decoy principle prototype under different background environments was simulated and calculated.A series of experimental studies on the infrared adaptive control of the decoy principle prototype in the ground simulation environment were carried out.Based on the structural similarity index function,the simulated similarity between the target and the infrared thermal image of the decoy principle prototype was evaluated.The theoretical correctness of the infrared adaptive regulation model of the emissivity-temperature synergistic control decoy technology was demonstrated from the point source detection and the surface source detection.4.Research on the influence of thermal control characteristics of PTC decoy TechnologyConsidering the influence of the performance parameters of polymer-based PTC materials at room temperature on the infrared radiation characteristics of missile decoy,the temperature field distribution and physical parameter changes of missiles under typical ballistic trajectories were simulated and calculated based on the control variable method and the calculation model of infrared radiation characteristics of space target.The effects of the changes of various physical parameters on the thermal control of the decoy were analyzed.Based on the orthogonal test method,the influence factors of the infrared radiation model of the PTC decoy were determined,and the strong and weak relationship of each influence factor was evaluated and analyzed.5.Research on infrared adaptive control of PTC decoy technologyConsidering the influence of radiation heat flow in complex space environment,a design method of PTC material performance parameters was proposed based on the decoy infrared adaptive control model.Based on the melting method,polymer-based PTC materials with performance parameters meeting the requirements of thermal control design were prepared,and the effects of different component ratios on the performance parameters of polymer-based PTC materials were studied.Considering the influence of latent heat and thermal conductivity of PTC material,a more accurate heat transfer model of PTC material was established,and the experimental verification in vacuum environment was carried out.And the point source detection radiation intensity of PTC decoy under different ballistic trajectories and different atmospheric windows was simulated and calculated,and the adaptive infrared camouflage effect of PTC decoy was studied.