... actuator, Ai and Aoare the input side and output side pistoneffective areas, pi and poare the input and output line pressures, qi and qoare the fluid flows into and out of the valve, pe and psrepresent ... matching: a necessary and sufficient conditionfor inputs restricted in magnitude and rate of change, International Journal of Control, 62(4):893–915.Mattson, S.E. (1984). Modelling and control of large ... Niksefat and Sepehri (2001). Aschematic diagram of the hydraulic actuator is shown in Figure 3.5 whereks and dsare the sensor stiffness and the sensor damping, ma and daarethe piston mass and...