Research on air suspension with novel dampers based on glowworm swarm optimization proportional–integral–derivative algorithm

摘要

In order to enhance automotive ride performance, permanent magnets and magnetic valves were introduced in magnetorheological dampers and hence permanent magnets and magnetic valves introduced in magnetorheological damper’sair suspension was studied. First, on the basic principle of providing magnetic field by permanent magnets and adjustingdamping force by magnetic valves, a novel permanent magnets and magnetic valves introduced in magnetorheologicaldamper was designed. On the basis of equivalent surface current model, magnetic induction intensity activated by permanent magnets in damping channel was calculated, and damping force model was built based on hydromechanics theory. Damping force–displacement experiments and damping force–velocity experiments were carried out, and thetheoretical model of permanent magnets and magnetic valves introduced in magnetorheological damper was verified.Then, physical and mathematical models of 4 degree-of-freedom permanent magnets and magnetic valves introduced inmagnetorheological damper air suspension model were built. In order to enhance the controlling effects of the studiedair suspension, optional moving operation, moving variation operation and operation of step size changing with fluorescein proportionality were introduced into glowworm swarm optimization algorithm, and glowworm swarm optimizationproportional–integral–derivative controlling algorithm was designed. Finally, three experiments with input of impact roadsurface, sine wave road surface, and white noise road surface were carried out, and the experimental results verified thatthe working performance of permanent magnets and magnetic valves introduced in magnetorheological damper air suspension based on glowworm swarm optimization proportional–integral–derivative controlling algorithm was good.