Modeling and Simulation of the Fluidic System in Liquid-Circular Angular Accelerometer Based on Mass-Spring-Damper System

Angular accelerometer plays an important role in inertial measurement. In this paper, modeling and simulation of the fluidic system in liquid-circular angular accelerometer is presented. A new train of thought is offered that the fluidic system of angular accelerometer can be equivalent to a rigid system. Based on it, a mass-spring-damper (MSD) model in state space form is established considering the compressibility of the fluid mass in the circular tube. In order to test the proposed model and determine the parameters including the degree of freedom, the stiffness and the damping coefficient, the SimMechanics library of the MATLAB software is selected to simulate. The simulation results indicate that the MSD model shows a good agreement with the previous transient flow model which our group has proved to predict the real fluidic system.