基于双模控制的直流力矩发动机控制系统设计

针对航控发电机对控制直流力矩发动机性能要求，在分析传统控制系统故障目标精准度定位速度慢基础上，提出了基于双模控制的直流力矩发动机控制系统设计。根据直流力矩发动机双模控制原理，设计系统总体结构。通过转速信号模拟器产生数字信号，在串行A/D转换电路中引入MAX144型号可编程逻辑器件，改善信号转换精准度。使用碳化硅（Sic）智能功率模块，为硬件设备提供合适膨胀匹配系数，改善能耗问题。选择TMS320F28335PGFA型号数字信号处理器，可将信号转换为数字形式。控制电源开关频率在50-100kHz范围内，具有一定抗干扰能力。添加电流环，为发动机提供相对恒定电流。在MPLABI_DE集成开发环境下，采用双模控制磁场补偿方式调试电流环控制程序，选择大小适中的通电电流，设置转子预定位程序，根据系统主程序流程，完成发动机控制系统设计。由试验结果可知，该系统在故障目标精准度定位速度上最快可达到0.05个/s，大大增强了系统鲁棒性能。

Design of DC torque engine control system based on dual-mode control

Aiming at the performance requirements of aero-control generators of controlling DC torque engines, based on the analysis of the slow positioning accuracy of traditional control system fault targets, a DC torque engine control system design based on dual-mode control is proposed. Based on the dual-mode control principle of DC torque engine, the overall structure of the system is designed. The digital signal is generated by the speed signal simulator, and the MAX144-type programmable logic device is introduced into the serial A / D conversion circuit to improve the signal conversion accuracy. Use silicon carbide (Sic) intelligent power modules to provide suitable expansion matching coefficients for hardware equipment and improve energy consumption. Select TMS320F28335PGFA digital signal processor to convert the signal into digital form. The switching frequency of the control power is in the range of 50-100kHz, which has certain anti-interference ability. Adding a current loop provides a relatively constant current to the engine. In the MPLABI_DE integrated development environment, the dual-mode control magnetic field compensation method is used to debug the current loop control program, select a moderate current, set the rotor pre-position program, and complete the engine control system design according to the system main program flow. It can be known from the test results that the system can reach the fastest positioning accuracy of 0.05 targets per second, which greatly enhances the robust performance of the system.