Research On Multi-dimensional Damping For Vichle-mounted Generator Set Based On Parallel Mechanism

The vehicle-mounted generator set is the primary electric power equipment for the communication vehicle, however, the vibration generated from the set not only affacets the reliability and the accuracy of the equipments and the instruments, but also aggravates the environment in the vehicle. Combined with the anti-vibration design for the generator set mounted in a certain communication vehicle, this paper performed the research on the parallel multi-dimensional damping technology. By applying for modern design theory and methods, full analysis in the weakly coupled design of the parallel multi-dimensional damping system, the impact of the set weight on the flexible foundation, the modeling of the parallel multi-dimensional damping system and the parameter optimization was excuted, a practical design method of the multi-dimensional vibration attenuation employing the monolayer structure was brought forward. With the application of the method, the multi-dimensional damping design was implemented in the generator set mounted in a certain communication.On the basis of the measurement and analysis of the generator set vibration characteristics, this paper presents the method of the parallel multi-dimensional damping design according to the defect in the exsisting damping measures, and proposes the strategy that using the weakly coupled parallel mechanism as the substrate of the multi-dimensional daping system. This strategy possesses sufficient engineering practicability of the multi-dimensional damping design for the vehicle-mounted generator set. In order to take the effect of the generator set preloading and the impact on the transverse vibration of foundation into consideration, the concentrated mass-loaded flexible foundation was molded. The the natural vibration characteristic parameters and the mobility matrix solving method of the foundation sub-structure was proposed. The solution was utilized to compute the parametric research on the mobility power flow transfer characteristics of the flexible foundation and to determine the influence of the parameters on the transfer power flow. The mobility matrix mathematical expression of the damping sub-structure was derived according to the dimensions conversion of the multi-dimensional vibration through the damping system.Given the mobility matix of each sub-structure, the mathematical model of the mobility power flow for the whole parallel multi-dimensional damping system was established, based on which the influence of the set weight, the spring stiffness and the damping in each limb and the structural parameters of the flexible foundation on the vibration power flow transfer characteristics. This modle could be applied conveniently to design the the spring stiffness and the damping value in each limb and the structure of the flexible foundation reasonably, to adjust and control the vibration power flow through the parallel multi-dimensional damping system, and then to achieve the purpose that attenuating the vibration of the generator set furthest. At last, the model experimental researh was performed to validate the feasibility of the parallel multi-dimensional damping scheme and the correctness of the design method. The research results in this paper show that the application of weakly coupled parallel multi-dimensional damping system can make the vehicle-mounted generator set obtain excellent multi-dimensional damping ability with no more change in other performances.