Direct-drive electro-hydraulic servo valves are widely used in the aerospace industry, military, and remote sensing control, but there is little research discussion on their performance degradation service life prediction. Based previous research, erosion wear primary physical failure form of direct-drive valves, parameters such as opening, oil contamination, pressure difference influencing fac...

Hydraulic assisted power steering system is a high bandwidth servo with stringent performance requirements on accuracy, reliability, and cost. Design of such a system can be best achieved by using a validated and user friendly computer simulation program. Hydraulic integrated power steering ( HIPS ) program has been developed using basic concepts from science and engineering. HIPS provides a de...