Research Article
U-Model-Based Finite-Time Control for Nonlinear Valve-Controlled Hydraulic Servosystem
Table 1
Parameters of simulated valve-controlled system.
| | Parameters | Symbol | Value |
| | Total leakage coefficient | | 2 × 10−13 (m3/s/Pa) | | Total volume of cylinder | | 1.72 × 10−3 (m3) | | Total mass of piston | | 80 (Kg) | | Effective area of piston | | 3.44 × 10−3 (m2) | | Elastic modulus of oil | | 6.9 × 108 (Pa) | | Flow coefficient of throttle | | 0.69 | | Density of the oil | | 880 (Kg/m3) | | Oil supply’s pressure | | 21 (MPa) | | Damping coefficient | | 1000 (N/(m/s)) | | Parameters of switching surface | | 4 | | 4 | | 1 | | Resonance frequency | | 20 (Hz) | | Bandwidth of the system | | 8 (Hz) | | Damping ratio | | 0.7 | | Coefficient of hyperbolic tangent | | 12 | | Error limit | | 0.01 | | Error limit | | 0.1 | | Specified finite time | | 3 (s) |
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