A regulator arrangement for a servo system.

摘要

A regulator arrangement (14) for a servo system (10) having a first stage piston (44) for developing a primary operational fluid (Pc) and a second stage piston (70) for developing secondary operational fluid Pcr having a constant fluid pressure. A control (109) selectively connects a first chamber (100) of a land to either the primary operational fluid pressure Pc or a reference fluid pressure PB to develop a fluid pressure Px in first chamber (100) while a second chamber (102) is connected to the secondary operational fluid (Pcr). A load (96) responds to a pressure differential (Px-Pcr) by moving to either expand or contract the second chamber (102) and produce a fluid pressure (Pcrx) in the secondary operational fluid. The fluid pressure Pcrx is communicated to the second piston (70) to correspondingly allow either additional primary fluid Pc) to flow to the secondary chamber (102) or release secondary operational fluid until the secondary operational fluid pressure returns to Pcr.