| In order to solve the simulation deviation caused by yoke reluctance and metal reluctance in E type balanced armature receiver and the difficulty to adjust the parameters of the simulation model in the initial design of the receiver.Based on the existing magnetic circuit model of E type balanced armature receiver,a new model of E type balanced armature receiver based on yoke reluctance and metal shell reluctance is derived.A lumped parameter model is established by means of electric force acoustic analogy and magnetic circuit model,and numerical simulation is carried out by space state equation.The main contents are as follows:1.An E type balanced armature receiver model based on yoke reluctance and metal shell reluctance is derived,and the effectiveness of the model is verified by comparing the impedance curve of the experimental model with that of the simulation model.The effects of reluctance parameters of different yoke and metal shell on the model frequency response curve were analyzed.2.An improved African Vulture algorithm based on sine and cosine optimization strategy and inertia weight factor is proposed.The benchmark function test is carried out,and compared with the traditional African vulture algorithm,gray Wolf optimization algorithm,whale optimization algorithm,firefly algorithm and gravity search algorithm,the statistical results show that the improved African vulture algorithm has obvious advantages in convergence speed and convergence stability.3.The yoke reluctance parameters and metal shell reluctance parameters of the proposed model are optimized by using the improved African Vulture algorithm.The comparison between the optimization results of the algorithm and the frequency response curve and impedance curve of the proposed model proves that the improved African Vulture algorithm can be used to optimize the reluctance parameters of the proposed model.By comparing the optimization results of the African Vulture algorithm and the improved African Vulture algorithm,it is proved that the improved African Vulture algorithm proposed in this paper is more suitable for the optimization of reluctance parameters of E type balanced armature receiver.The improved model in this paper has certain guiding significance for cavity design and model simulation of E type balanced armature receiver,selection of magnetic yoke and soft magnetic material of metal shell,analysis of formant deviation of balanced armature receiver,parameter optimization by using swarm intelligence algorithm,etc. |
