Fig 1.
The schematic of the proposed motor-driving DHPS.
Table 1.
The physical and initial parameters of the motor-driving DHPS prototype and quarter-car model.
Fig 2.
The working principle of the motor-driving DHPS.
(a) The height adjustment process (b) The strut height under different sprung masses (ms2<ms<ms1).
Fig 3.
The output force curve diagram of motor-driving DHPS.
Dashed line (black): static output curve; Solid line (red): working dynamic curve.
Fig 4.
The experimental setup.
Fig 5.
The experimental result of harmonic excitation with different amplitudes and frequencies.
(a) Frequency (f) = 1.0Hz (b) Amplitude (A) = 30mm.
Fig 6.
Experimental results of output force under different hb.
(a) Frequency (f) = 0.5Hz & Amplitude (A) = 30mm (b) Frequency (f) = 1.0Hz& Amplitude (A) = 30mm.
Fig 7.
The experimental result of the hb from 10 to 80mm with different driving velocities of hb (vb = 25mm/s & 50mm/s).
Solid line (black)-vb = 25mm/s; Dashed line (red)- vb = 50mm/s.
Fig 8.
Comparison of experimental data and simulation results at 30mm amplitude under different hb.
(a) Frequency (f) = 0.5Hz (b) Frequency (f) = 1.0Hz. Solid line-simulation result, Dashed line-experimental data; Black- hb = 0mm; Red- hb = 40mm; Blue- hb = 80mm.
Table 2.
The coefficient of determination (R2) between experimental data and simulation result.
Fig 9.
Comparison of output force between experimental data and simulation results under different vb (hb from 10 to 80mm).
(a) vb = 25mm/s (b) vb = 50mm/s. Solid line (black)- experimental data; Dashed line (red)- simulation result.
Fig 10.
Δxs and output force with different hb under the same sprung mass.
(a) Δxs; (b) output force.
Fig 11.
The simulation result of Δxs under a static state with different vb.
(a) hb = 0 to 25mm (b) hb = 0 to 50mm.
Fig 12.
The simulation result of height adjustment under random excitation (C-level and v = 10m/s).
(a) hb = 0 to 25mm (b) hb = 0 to 50mm.
Fig 13.
Height adjustment under different sprung masses.
Dotted line (blue)-474.6kg; Solid line (black)-420kg; Dashed line (brown)-360kg.