Research On Beyond Visual Range Multi-Target Attack And Fighter Guidance Key Technology

Referring to the theory of the modern air-combat , the thesis discusses the process of Beyond Visual Range Air Combat about"Air-to-Surface precise attack"; According to the optimal strategy, studies respectively the four key techniques, which are multi-target sorting, multi-aircraft cooperative air-combat and the optimization of proportional navigation of the fighter and the technique of the associated attack and defend of group fighters.Firstly, a study of target sorting in air combat of single aircraft against multiple targets is presented using the fuzzy optimization method. According to given velocities, distance, relative angle, the target capability and the relative energy index between the target and the attack, the factors are changed into threaten index, which is between the attack and the target, using the mathematic optimum method. Eventually the attack sequence can be determined by the synthetic evaluation.Secondly, a study of assignment algorithm for multi-aircraft attacking cooperatively on multi-target is presented by the two-person matrix game method. According to the fuzzy sorting algorithm for multi-target attack, the threatening index matrix with multi-aircraft against multi-target is gained. Then, using the principle of saddle point algorithm and the method of relative superior algorithm, the targets are assigned to aircrafts in order that a side of multi-aircraft may get optimal strategy. After that, the optimal proportional strategy of group of aircrafts is studied by the method of mixed strategy and the fuzzy theory in order to gain optimal consequence of air-combat.Lastly, the optimized proportional navigation of modern fighter is researched with radial basis function (RBF). Using the sampled controlling parameters of the aircraft under Pure Proportional Navigation (PPN), the thesis designs the corresponding discrete input signal of the guidance controller under the inside demand of the pursuing control, and trains a module of RBF off-line. Then, the module is inserted into the control system of the aircraft and acted as its control input in order that the optimal function of the aircraft under PPN can be realized.