Research On Topology Optimization And Control Technology Of Working Devices Of Emergency Rescue And Troubleshooting Engineering Vehicles

With the development of society,the state has paid more and more attention to the development of emergency rescue equipment in order to reduce the loss of people’s property in natural disasters and man-made accidents.The Emergency Rescue Vehicle is one of the important emergency rescue equipments with various functions and high speeds,which is widely used at home and abroad.At the same time,the Emergency Rescue and Discharge Engineering Vehicle is also a kind of construction machinery,featuring high emission and high energy consumption..In order to alleviate increasingly severe environmental problems and target energy-saving and emission-reduction,the excavation work device for emergency rescue vehicles was studied from the aspects of structure and hydraulic control technology.In order to reduce the weight of the work device,the multi-objective topology optimization technology is introduced into the structural optimization design of the work device.Due to the complex force conditions of the work device,the structure optimized by considering a variety of working conditions and frequency sub-objectives is more effective.Can meet its use requirements.In order to solve the key problem of multi-objective topology optimization,that is,the determination of the trade-off coefficient between sub-goals,a method for determining the trade-off coefficient based on the initial optimization state and severity is proposed.The comprehensive objective function determined by the method is used to optimize and finally obtain The ideal boom topology for excavating work devices.In order to further improve the energy-saving effect of the working device and improve the energy utilization efficiency of the working device of the emergency rescue working vehicle,a new method for recovering the potential energy of the composite boom is proposed in this paper,which partially converts the gravitational potential energy of the working device hydraulic energy when it falls.The hydraulic energy is stored in the accumulator and part of it is converted into electricity by the generator/motor and stored in the super capacitor.This method does not have throttling and overflow losses.Through dynamic simulation and hydraulic system simulation,the potential energy recovery efficiency of this method is higher than the general method.In order to reduce the influence of the energy recovery system on the control performance,research and analysis of the control technology have improved the handling performance of the system,and provided a certain reference value for the practical application of the gravity potential energy recovery technology of the working device.