Modeling and simulation of imbalance disturbance for inertially stabilized platforms

Ideally, the centroid of an inertially stabilized platform is located on the axis of rotation, but in fact, the centroid of an inertially stabilized platform will deviate from the axis of rotation because of the limits of processing technology. What's more, under the function of base angle movement and friction, an inertially stabilized platform will produce a deflecting angle. A change of deflecting angle will cause a horizontal and vertical change of the arm of force; in this case, an imbalance disturbance comes into being. In order to analyze the influence of the imbalance disturbance, the paper takes the simplified dynamical model of an inertially stabilized platform as its basis and introduces the idea of establishing unbalanced disturbance by analyzing the changing rule of the deflecting angle and the arm of force. Based on the unbalanced disturbance, it analyzes the effect of an unbalanced disturbance on an inertially stabilized platform by quantitative simulation. The results show that the output angle of an inertially stabilized platform in a stabilized state exceeds the stabilized demand under the function of unbalanced disturbance.