Position Control of a Single-Rod Electro-Hydrostatic Actuator Experiencing a Leaky Piston Seal

Figure 11

Simulation responses of QFT controller G_FTC and F_FTC to various step inputs for normal operation as well as different leakage levels, considering parameter ranges in Table 1 the actuator is moving load masses of 0 kg, 150 kg, and 300 kg in free motion, against a 65- and 130-kN/m spring. (a) Position. (b) Control signal. (c) Position error. (d) Leakage flow.

(a)

(b)

(c)

(d)