基于软件校准的短波发射机功率控制系统设计

Design of HF Transmitter Power Control System Based on Software Calibration

摘要:

短波发射机功率稳定一直是通信领域致力改善的重点问题,短波发射机功率不稳定会直接影响无线电通信质量,造成通信失真、表达不清晰等问题。针对上述问题,基于软件校准设计短波发射机功率控制系统。该系统借鉴MVC设计模式搭建系统数据库层、业务逻辑层、控制层以及界面显示层基础框架；将功率计与短波发射机相连,实时采集工作状态下的短波发射机功率数据,通过信号处理器实施处理后并存储,借鉴传输元件,将数据发送到控制器,通过控制器校准短波发射机功率与预期之间的偏差,以偏差量为输入,利用改进PID运算得出控制量,生成控制命令,通过输入输出信号接口板输出命令,控制驱动装置调节短波发射机运行参数,实现功率控制。结果表明：与 控制系统、自动调谐系统应用相比较,在所设计系统应用控制下,100s内短波发射机的功率变化曲线与预期曲线之间的拟合优度指数更大,更接近1,优于对比系统,说明相比于对比系统。本系统控制表现更好,更能维持短波发射机功率稳定,达到了研究目标。

Abstract:

The stability of short-wave transmitter power has always been a key issue in the field of communication. The instability of short-wave transmitter power will directly affect the quality of radio communication, resulting in communication distortion and unclear expression. Aiming at the above problems, a shortwave transmitter power control system is designed based on software calibration. The system draws on the MVC design mode to build the basic framework of the system database layer, business logic layer, control layer and interface display layer; connects the power meter with the shortwave transmitter, collects the power data of the shortwave transmitter under working conditions in real time, and implements it through the signal processor. After processing and storing, refer to the transmission element, send the data to the controller, calibrate the deviation between the shortwave transmitter power and the expected through the controller, take the deviation as the input, use the improved PID operation to obtain the control value, and generate the control command, Through the input and output signal interface board output commands, control the drive device to adjust the operating parameters of the short-wave transmitter, to achieve power control. The results show that compared with the application of "N+1" control system and automatic tuning system, under the application control of the designed system, the goodness of fit index between the power variation curve of the shortwave transmitter and the expected curve within 100s is larger, Closer to 1, better than the comparison system, indicating that the comparison system is compared. The control performance of the system is better, and the power of the short-wave transmitter can be maintained more stable, which achieves the research goal.