Research On Optimization Algorithm Of Bridge Energy-saving Pneumatic System

As one of the widely used energy sources in industrial field,the proportion of compressed air in industrial energy consumption keeps increasing.Because the waste of compressed air is different in the process of production,transportation and terminal consumption,resulting in utilization ratio of compressed air is extremely low,which cannot meet the requirements of energy saving and environmental protection in the case of resource starvation.Therefore improving the utilization ratio of compressed air is of important practical significance and application value.In view of the problem of large air consumption in traditional circuit,a new type of bridge circuit is proposed in this paper.The purpose of energy saving is to make use of the expansion of compressed air to do work and recycle the exhaust gas.The research work of this paper is mainly focused on the following aspects:(1)Based on the idea of making full use of expansion energy and recycling exhaust air,a pneumatic cylinder with a rod and five 2-way directional control valves connected as a bridge has been formed,which could run when the five valves switch separately.On the premise of ensuring the piston runs smoothly to the end of the stroke,find five valves’ switching time to realize the bridge circuit consume less energy than traditional circuit.(2)Based on the idea of dynamic optimization,with the objective of air consumption as the optimization objective,and the pressure,flow and kinetic equations of the pneumatic system as constraints,a mathematical optimization model of the system is established.Combined with the finite element orthogonal configuration method and the interior point method,the optimal calculation of the switch time schedule of five valves in the bridge loop is realized by AMPL.(3)According to different piston diameter,different air pressure and different mass,by using the AMPL,setting the total travel time and different discrete points,a lot of optimization and simulation have been done,which conclude the scope of the bridge circuit.(4)A bridge circuit experiment platform has been established,by using the acquisition and control program of Labview,combined with the acquisition data of system pressure,flow rate,velocity and displacement,the valves’ switching time,which are obtained by optimization under different boundary has been verified that is effective for the stability and energy saving of the bridge circuit,and the scope of application of bridge circuit has also be concluded.