An optimal control method for time-delay feedback control of 1/4 vehicle active suspension under random excitation

Time-delay feedback control can effectively broaden the damping frequency band and improve efficiency. However, existing time-delay strategy has no obvious effect on multi-frequency random excitation vibration reduction control. That is, when of external is more complicated, there better way to obtain best parameters. To overcome this issue, paper first work proposing an optimal calculation method that introduces stochastic into process solving delay It a parameter with for excitation. In paper, 2 DOF one-quarter vehicle suspension model studied. First, stability interval parameters solved by using Lyapunov theory. Second, under are particle swarm optimization (PSO). Finally, simulation models established. Random harmonic used as inputs. The response body domain proposed compared simulated. make precision higher solution speed faster, simulates precise integration transient history. results show acceleration in 13.05% less than passive absorber Compared optimized function, 12.99%. displacement, velocity, function method, whether it or ride comfort improved obviously. provides valuable tool