一种新型多功能信号源系统的设计

Design of a New Multifunctional Signal Generator System

摘要:

为适应航天领域遥测外系统的快速发展,提出了一种新型多功能信号源系统的设计；系统以FPGA为逻辑控制单元,采用PCI总线接口实现了与上位机的通信,同时结合AD5628、AQY210及RS422接口芯片稳定地输出了多路模拟信号、开关信号及一路PCM信号；重点阐述了信号源系统硬件及软件设计中的关键技术；试验结果表明,该系统能够提供多种高精度、高可靠性的信号,且工作性能稳定,抗干扰能力强,数据传输速率达到40 Mbps,PCM码率高达983.04 kbps,满足了系统设计的要求。

Abstract:

In order to meet the rapid development of telemetry system in the aerospace fields, this paper presents the design of a new multifunctional signal generator. The system uses FPGA as the logical control unit, and uses PCI bus interface to achieve the communication between the IPC and the system. FPGAs are combined with AD5628, AQY210 and RS422 interface chips to produce many analog signals, switch signals and a PCM signal. This paper chiefly states the key techniques in the hardware and software design of the system. The test results show that the system stably provides a variety of high-precision and high-reliability signals and its anti-interference ability is strong. Data transmission rate can reach 40Mbps and PCM code rate is up to 983.04 kbps , which meet the demands of the design.