摘要
针对地球模拟器“轻量化、小型化”的要求,开发出基于PCI总线的测量和控制系统。该系统对光栅位移信号进行电子学倍频及辨向处理以提高测量和控制精度;采用“填脉冲”测温方法,根据周期内填入的脉冲数,计算温度信号的周期,再利用软件算法得出温度值;将弦臂控制和角度测量结合在一起,以测得的角度值作为反馈,和步进电机组成闭环位移控制系统。利用PCI9052接口芯片及XC2S30FPGA大幅度提高了系统的处理速度,简化了系统结构。实验表明,轻量化小型地球模拟器使用该系统后,温度控制范围达到26±10℃,精度为±0.3℃;滚动及俯仰角度控制范围分别为±36°和±61°,控制精度均达到1′。
A measurement and control system based on PCI bus is developed in accordance with the demands of Light and Pint-sized Earth Simulator. In the system, grating displacement signal will be processed through electronic multi-frequency and direction processing to improve measurement and control accuracy. Based on filling pulse method, the temperature value can be calculated according to the filled pulse number in the cycles. In combining cantilever control with angular measurement and using the measured angular values as feedback, a closed-loop displacement control system is formed together with a step motor. The processing speed of the system is greatly improved and the structure is simplified by PC 19052 interface chip and XC2S30 chip. Experiments show that temperature range can be up to 26±10°C and accuracy can be±0.3°C. The control range of rolling angle and pitch angle can be up to ±36° and ± 61° , respectively with a control accuracy 1'.
出处
《光电工程》
EI
CAS
CSCD
北大核心
2005年第5期1-3,15,共4页
Opto-Electronic Engineering
