Design and Signal Delay Analysis of Spinning Missile Electric Rudder Control System

In order to meet the requirements of ultra-small special-purpose missiles for miniaturization, high dynamic characteristics and low signal delay of the missile-mounted rudder, and to reduce the working pressure of the navigation computer control system, a digital electric rudder control system based on MCU and H-bridge integrated power drive chip was designed and implemented. The system uses the Texas Instruments C2000 high-performance MCU as the core control unit to process the single-channel rudder position feedback signal. After the fuzzy position PID algorithm calculation, the control signal is output in the form of pulse width modulation (PWM) waveform, and the rudder control is completed by the DRV8872 power drive chip. Aiming at the problem of phase delay in missile attitude control system, the reason of delay is analyzed from the perspective of system composition. The phase delay formula is derived through theoretical calculation and sine sweep test. A method based on navigation computer deviation compensation is proposed. It has been proved by experiments that the rudder control system has good dynamic response capability and has good compensation effect on system signal delay.