| With the development of modern warfare in the direction of intellectualization and informatization,the data acquisition system of the front-end of the projectile control system has been widely used in product design and testing.Especially in recent years,the breakthrough of integrated electronic technology and software system has provided a good foundation for the development of data acquisition system in the direction of small volume,fast speed and high precision.Based on the existing researches,this paper proposes a dual-core missile surface pressure testing system based on FPGA+ARM.The air pressure on the surface of the missile during the flight is collected by a high-precision pressure sensor mounted on the surface of the missile.Simple analysis and storage of collected data provides data support for flight control agencies.The system has a simple structure and is easy to use.It can be used for the simultaneous acquisition of multiple pressure signals.The hardware part of the missile surface pressure test system based on FPGA+ARM mainly includes a signal conditioning module,an FPGA logic module,an ARM control module,and a power supply module.The signal conditioning module is mainly used for amplification and filtering of the sensor signal,and the analog signal acquisition is completed through an eight-channel synchronous acquisition A/D analog-digital conversion chip.The FPGA module is mainly used for A/D chip control,SDRAM memory management,and data buffering and parallel transmission.FIR digital filters are added into this design to further improve data acquisition accuracy.IP cores such as PLL and asynchronous FIFO are used to improve system stability and hardware utilization.The ARM module mainly completes the control of the acquisition process,the processing and storage of data information,and the design of the communication interface with the host computer to facilitate the data export and further analysis.Finally,after completing the hardware and software design of the system,relevant tests and timing simulations were performed on each of the major modules for the implemented missile-borne data acquisition system,which verified the feasibility of the design scheme.The sensor is connected to the missile-borne data acquisition system for pressure acquisition test,and the acquisition result is compared with the results of the transient signal acquisition instrument,which verifies the accuracy of the pressure acquisition and shows that the system has higher stability,can be used for the surface pressure test during the projectile flight,so as to facilitate the further adjustment and control of this mechanism. |
