Analysis and modeling for the framework structures of light-of-sight stabilization tracking platform

For the status that the framework structure of LOS(light of sight) stabilization platform for tracking are complex, based on the analysis between the framework and the LOS axis, the two-axis-two-framework structure, the three-axis-three-framework structure, and the two-axis-four-framework structure are compared, both the advantages and disadvantages are discussed, then, it is concluded that in order to isolate the disturbance of the carrier´s moving stability, only the two-axis-four-framework structure is the best approach. At last, the mathematical model of the framework structure is created and the problem that the stability and accuracy of the platform framework is analysis, when in a large pitch angle moving, and then the model can be applied to the controller designing is satisfied to the actual platform.