Study On Fuzzy-Neural Sliding Mode Guidance Law With Terminal Angle Constraint

With the continuous development of missile technology in the modern warfare, the air-to-surface missile attack target that has become the key point of the development of the aviation weapon. To obtain a better kill effect of the warhead of missiles, many kinds of missiles are expected to get not only a minimum miss-distance but also a desired terminal angle, Most current guidance laws with terminal impact angle constraint cannot satisfy the guidance mission, therefore it is necessary to perform research about the guidance laws which has the special mission.Firstly, in this paper, the missile and target motion equation was derived according to their relative motion. Because of the guidance law expected to get minimum miss-distance and desired terminal angle, the sliding mode variable structure control method is introduced in this paper which is satisfy the two requirement at the same time. Due to the switching function and variable structure control of reaching law function, it is appear the jitter problem. Fuzzy logic control has strong nonlinear approximation ability, this paper use this advantage to eliminate the jitter problem of variable structure control, Fuzzy sliding mode guidance law with terminal angle constraint is given in this paper, and through the simulation and analysis, gives the error coefficient of angle, the coefficient of reaching law and the coefficient of on-off item of effect guidance law characteristic curve.Secondly, in order to improve the fuzzy variable structure guidance law for maneuvering target attack effect, neural network to the optimization design was carried out on the guidance law this paper. The neural network was trained by the samples, which is under condition of different error coefficient of angle, the coefficient of reaching law and the coefficient of on-off item about target. Fuzzy-Neural Sliding Mode Guidance Law with Terminal Angle Constraint can increased the performance of the large maneuvering target.Finally, on the basis of the traditional visual simulation system, joined the embedded system platform, and then constituted a new guidance law simulation platform based on embedded system and virtual reality technology. The paper gives the whole design process of the simulation platform, and shows the simulation results.