基于FPGA和PCI总线的空间相机温控测试电路设计

Detection Circuit Design of Space Camera Thermal Control based on FPGA and PCI Bus

为在地面精确模拟空间环境对相机主动热控电路和控制策略的影响,测试其性能和可靠性,设计了一种基于FPGA和PCI总线的空间相机温控测试电路。FPGA控制PCI9054高速接收上位机经由PCI总线发送的环境温度变化信息,经解析打包后,FPGA控制多路并行电位计模拟热敏电阻的阻温特性,完成实时闭环仿真测试。分析和试验结果表明,系统能够满足空间相机主动热控的测试需求。

In order to simulate the influence of space environment on the active thermal control circuit and algorithm on earth,and test the performance and reliability,a thermal control detection circuit of space camera was designed based on FPGA and PCI bus.PCI9054 was controlled to receive the temperature variables transferred by PC.The multiple parallel digital potentiometers were controlled to simulate the characteristic of temperature and resistance of thermistor,thus the real closed-loop simulation and detection were achieved.The analysis and experiment results showed that the system could satisfy the detection requirements of the space camera active thermal control.