The invention discloses a feedback monitoring voting method suitable for a four-redundancy
servo system, and the method comprises the steps: 1, setting a monitoring voting surface position, enabling a DSP to obtain an FPGA
rocket command
signal and other data, and writing the signals into an FPGA dual-port RAM; step 2, fault isolation counting and redundancy reconstruction are carried out in the DSP, and channels with obvious faults are prevented from continuously participating in
system voting; 3, monitoring the four paths of feedback signals in the DSP; 4, executing a corresponding voting
algorithm according to monitoring results of the four paths of signals; 5, performing closed-loop operation according to the voted
servo mechanism position feedback, and outputting a PWM
control signal; and step 6, performing deviation
signal interaction on the control instruction and voted feedback, updating a fault status word according to a voting result of a deviation
signal, and transmitting the fault status word to the FPGA. According to the four-redundancy
servo system, the redundancy design that the performance of the four-redundancy servo system is not affected when two paths of signals fail can be ensured, and the flight reliability of a carrier
rocket is improved.