多扫描周期摆镜伺服系统设计与实现

Design and Implement of a Multi-swing Cycle Scanning Servo System

扫描摆镜伺服系统是扫描型热像仪的核心部件之一,扫描摆镜摆动周期需适应热像仪视频制式的要求。为了支持扫描型热像不同速率视频输出的需求,基于双向扫描摆动方式,设计并实现了多扫描周期摆镜伺服系统。给出了基于FPGA、MCU构架的硬件方案、目标轨迹特性及控制算法的设计方法。实验测试结果表明本扫描摆镜伺服系统具有跟踪精度高、频率切换时间短和运行稳定等特点,具有很强的工程实践性。

Scanning servo system is one of the core components of the scanning thermal imager. Scanning mirror swing cycle needs to adapt to the imager video system requirements. In order to meet the needs of multi-rate scanning thermal imaging video output, a multi-swing cycle scanning servo system is designed and achieved based on bi-directional swing scanning mode. This paper presents the hardware components of the servo system, characteristics of the target trajectory and the method of designing the control algorithm. With FPGA-MCU architecture, the servo system is implemented. The test results show that the servo system has the characteristics of high tracking accuracy, short frequency switching time, good stability characteristics and high practical value.