Double-shaft rotation inertial navigation indexing mechanism driving system

The invention discloses a double-shaft rotation inertial navigation indexing mechanism driving system which is characterized in that a PWM control signal output by a three-ring PID controller is converted into a PWM control mode driving signal for controlling operation of a brushless motor through a driver circuit, and the PWM control mode driving signal is subjected to signal gain amplification through a driving gain circuit; the output is output to a control end of a brushless motor of the double-shaft rotation inertial navigation indexing mechanism; meanwhile, the rotor position, the rotor rotating speed and the three-phase current of the brushless motor are collected by means of a feedback signal collection circuit and are fed back and output to the three-ring PID controller; the three-ring PID controller outputs a corresponding PWM control signal to the driver circuit according to a set inertial navigation transposition target control instruction, carries out three-ring PID operation according to the rot