基于ADRC的高精度红外热成像仪温度控制系统设计

Design of Temperature Control System for High Precision Infrared Thermal Imager Based on ADRC

摘要:

为了可以更加精准地控制红外热成像仪温度,提出一种基于ADRC的高精度红外热成像仪温度控制系统。由系统供电模块、探测器驱动模块、模数转换模块、视距估算模块、视频信号处理模块、外部存储模块、以太网传输模块和温度控制模块组成系统硬件模块。利用自抗扰控制设计一种单轴控制器,将由时延带来的不确定性建模作为系统综合扰动的一部分,对扩张状态观测器以及总和扰动展开估计,同时在前馈通道对其展开补偿,消除时延对控制器产生的影响,将控制器应用于外热成像仪温度控制中,获取高精度的红外热成像仪温度控制结果。通过实验分析证明,所提系统具有良好的红外热成像仪温度控制性能,可以获取高质量的红外图像。

Abstract:

In order to control the temperature of infrared thermal imagers more accurately, a high-precision temperature control system for infrared thermal imagers based on ADRC is proposed. The system hardware module consists of a system power supply module, detector driver module, analog-to-digital conversion module, line of sight estimation module, video signal processing module, external storage module, Ethernet transmission module, and temperature control module. Design a single axis controller using auto-disturbance rejection control, modeling the uncertainty caused by time delay as part of the total disturbance of the system, estimating the extended state observer and the total disturbance, and compensating it in the feedforward channel to eliminate the impact of time delay on the controller. Apply the controller to the temperature control of the external thermal imager to obtain high-precision temperature control results of the infrared thermal imager. Through experimental analysis, it has been proven that the proposed system has good temperature control performance of the infrared thermal imager and can obtain high-quality infrared images.