A closed-loop control system based on electromagnetic force feedback is designed to address the issues of poor linearity and limited measurement range in micro-grating accelerometers

thereby satisfying the requirements of inertial navigation applications.To evaluate the practical applicability in inertial navigation of deep-sea submersible

comprehensive simulation verification of accelerometer performance within the ±1

g

n

(

g

n

=9

.8m/s

2

) measurement range is systematically implemented.An electromagnetic actuator model is established and finite element simulation analysis is performed.The simulation results demonstrate that the electromagnetic actuator generates an electromagnetic force of 2.61mN with an input current of 40.63mA.This force is equivalent to the inertial force produced by a 1

g

n

acceleration acting on the proof mass

enabling the mass block to remain at its optimal operating position within the ±1

g

n

acceleration range.The simulation verifies that the closed-loop system output exhibits excellent linear relationship within the ±1

g

n

range

with a correlation coefficient

R

2

of 0.9997 and a sensitivity of 29.15V/

g

n

.The designed electromagnetic force closed-loop control system extends the accelerometer’s measurement range to ±1

g

n

representing a 533.3-fold improvement compared with traditional open-loop systems.