飞控计算机测试中的数字舵机模型的设计

Design of Digitalized Actuator Model Used in FCC test

论述了在飞控计算机测试技术中舵机仿真模型的作用以及必要性;简要介绍了舵机模型的电路结构,以及采用数字技术实现舵机电路的设计方法;主要阐述了以FPGA+DSP的协同信号处理平台的设计模式,以FPGA为协处理器完成模拟信号的采集、D/A输出,以及与上位机的信息交互,以DSP为主处理器用于舵机模型增益、限幅、滤波、积分等运算,通过模拟接口电路完成与飞控计算机的闭环连接,起到仿真舵机工作的目的。

The functions and necessities of actuator simulation models used in FCC test have been discussed. The circuitry structure and digitalized technology method of realizing the actuator circuit design have been briefly introduced. A design pattern based on FPGA/DSP co-- processing platform has been described. Using FPGA as secondary processor, the functions of analog signals acquisition, D/A output and communication with host computer can he achieved. The DSP works as the primary processor to fulfill the tasks of calculating the actuator model gains, limiters, filters, and integrators. The results of calculating have been linked with the FCC through the analog interface to simu- late an actuator.