Research On The Multi-modal Syntonic Device For Heavy-load Vibration Table And Its Control Algorithm

Military vehicle equipment, especially the mobile artillery with turret, during transportation and operations process, will be face to terrible vibration and shock, which will cause device failure. To this end, we need to put the prototype into actual working conditions, though vibration testing, identify potential faults, by strengthening the weak parts, improve the reliability of the equipment. According to the design goals, we process to use the overall program by electromagnetic excitation serial hydraulic excitation, and expand research on key technologies encountered in the design process.For the system in the vicinity of the crossover frequency 10Hz continuous excitation, the input power up to 1.1 MW, the hydraulic power demand is higher than 1.1MW, in this paper, we propose a new method to improve the efficiency and reduce the input power of the system by using the syntonic. We derived the mathematical model for double nozzle flapper valve, hydraulic cylinder and syntonic device, and construct the block diagram in Simulink, analysis the open-loop characteristics of the system, analysis the open-loop characteristics of the system, we found that when the system with Syntonic Device vibrate at a constant amplitude in the vicinity of lOHz, which required work input power is reduced by a half, so that, the expected design goal is achieved. For hysteresis characteristics of the hydraulic system, we put forward the PID control method based on zero phase feedforward compensation to Improve the tracking performance of the system sinusoidal. We built the experimental system consists of syntonic device, and analysed the stiffness characteristics of variable stiffness device, by sweep experiment from 2 Hz to 20Hz and fixed frequency experiments on 6.5Hz,10Hz, it was found that the pressure on the system contain syntonic device was significantly smaller than that of the system without syntonic device, so the system can improve the efficiency and reduce the input power of the system by using the variable stiffness resonance mechanism.In the design of electromagnetic vibration exciter, the mechanical body part adopts two degree of freedom vibration system, and the system is expanded by two modes. Analyzed the static characteristics and dynamic characteristics of electromagnetic exciter by Ansoft/Maxwell and MATLAB/Simulink.The turret must be placed into the supporting platform, so the platform must be designed for hollow structure, lead the structural rigidity to a lower level, made the first mode frequency less than the frequency of use, control accuracy decreases, we put forward that making full use of platform deformation, within the stress and strain at allowable range, to amplify the amplitude of the high frequency end. According to the actual platform we selected 10th modal as the optimization objective for further dynamic optimization. According to the principle of equal stiffness, we designed a physical model, and made a modal analysis and harmonic response analysis for it.