Acoustic mechanical antenna is one of the important types of mechanical antenna, the resonant frequency of acoustic mechanical antenna is highly coupled with its natural frequency. However, the current acoustic mechanical antenna is limited by material size and has high resonant frequency, which can not to meet the needs of very low frequency or lower frequency band. In order to control the resonant frequency of acoustic mechanical antenna, the vibration modeling of acoustic mechanical antenna was carried out. Three methods were proposed: adding unilateral fixed constraint, increasing free end mass and removing some materials of antenna. Proposed method was verified by finite element simulation. Results show that the three methods can effectively control the resonant frequency of acoustic mechanical antenna, and are in good agreement with the analytical model. Influence of three methods of regulating resonant frequency on the electric field or magnetic field intensity radiated by the antenna was studied through the stress distribution, which has important reference significance for the design of acoustic mechanical antenna.

Experiments and competitions based on intelligent vehicles cultivate students' practical ability and multidisciplinary synthesis, which are good carrier for colleges and universities to cultivate new talents. In order to solve the problems of long experimental cycles, insufficient equipment and restricted space for relevant offline experiments, this paper builds a virtual simulation platform for intelligent vehicles based on the kinematic simulation model Coppeliasim and the mathematical modelling software MATLAB. The platform is highly reproducible to the offline course experimental scenario, while its track design has a certain degree of freedom and can meet the needs of students with different abilities at the same time. In addition, the simulation experiments developed on the platform stimulate students’ interest in intelligent vehicles, enhance their participation, and improve their operational and creative thinking skills and have achieved good teaching results.