Fig 1.
Schematic of the DDVC–FRVSG.
Fig 2.
Schematic block diagram of the DDVC–FRVSG.
Table 1.
Nomenclature.
Fig 3.
The surface-arisen friction.
Fig 4.
System chart of proportional derivative negative feedback.
Table 2.
Parameter of test bench.
Fig 5.
Experimental result: Step response.
Fig 6.
Experimental result: Triangular and sine signal response.
Table 3.
Duration of positive step response.
Table 4.
Duration of negative step response.
Table 5.
Duration of triangular wave(A) and sine wave(B) response.