Design And Research Of Multiple Steering Gear Control System For Electric Propulsion Aircraft

The electric propulsion aircraft control system is usually composed of an aircraft control computer subsystem,a servo subsystem,a communication subsystem,and the like.In this paper,when the aircraft is running in the air,multiple steering surfaces are required to cooperate to complete the conversion tasks of various flight attitudes.A set of reliable and responsive multi-servo servo and communication system solutions is proposed and designed.The scheme uses high performance DSP + FPGA as the core control architecture,and designs overcurrent protection,signal isolation and power filter mechanisms to enhance the reliability and anti-interference ability of the system.The TTP protocol not only enhances the communication rate between the AC servo systems of multiple actuators,but also does not affect the safety of the whole system when one of the actuators fails,and improves the redundancy of each node in the aircraft communication system.Considering that UAVs often encounter uncertainties when they work in the field,which may result in the loss or damage of UAVs.Or when the power supply is exhausted,it can not work,nor can it be found by the staff,resulting in the loss,so the latest NB-IOT network is used to sample and report the real-time location,so that when the power is insufficient,the geographical location of the current UAV can be reported to facilitate staff recovery.Considering the aircraft flying in the air,in order to ensure the stability and safety of the aircraft,all the drive and control boards are sealed in the electric propulsion system,only the common serial ports are left out,which brings a lot of inconvenience to the optimization and upgrading of the entire electric propulsion system,so it is necessary to study and design a system which is easy to update and upgrade.This electric propulsion system adopts the hardware platform based on TMS320F28377.By analyzing the program download process and FLASH_IAP library function of TI company's TMS320F28377,the storage location of the DSP program is reasonably allocated,and then the upgrade and optimization of the DSP program of the LABVIEW and Bootload program are designed to upgrade and optimize the whole electric propulsion system.The multi-rudder control system performs relevant experimental tests on the position angle and control performance of each controller.According to the experimental results,the control performance of the system is ideal and meets the expected requirements.Moreover,it can be seen by looking at the GPS data information fed back by the NB-IoT network.In the low power state,the location information can be fed back to the server after being encrypted,which is safe and reliable.Moreover,in the maintenance and optimization of the aircraft,a complete software optimization method is designed to improve the portability and tailorability of the software system.