also been reported [4]. However, in this

The block diagram of the hydraulic servomotor is shown in FIGURE 3. In this block diagram, it is assumed that the hydraulic servomotor separates into linear and nonlinear parts.

Pt

Figure 2. Approximation of flow characteristic curve of servovalve

In the LMFC system, the linear 2nd-order system is chosen as the reference model represented by eq. (6).