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

Figure 1

Schematic of the system developed in [6]. 1: Servomotor. 2: Bidirectional pump.3: Auxiliary pump. 4: Relief valve. 5: Actuator. 6: Load mass. 7: Spring. 8: Tank. V1: One-directional flow control valve. V2: Three-position four-way directional valve.