| 摘要 |
An actuator arrangement 10 is provided. The actuator arrangement 10 comprises: a primary drive member 16 located within a housing 20 and defining, with the housing 20, a first chamber 22 and a second chamber 24; a controller 26 controlling the application of fluid under pressure to the first and second chambers 22, 24 to drive the primary drive member 16 for movement; an auxiliary drive member 36 moveable between a retracted position and an extended position under the control of an auxiliary controller 44. The auxiliary controller 44 is responsive to a control pressure applied, in use, to control the pressure applied to the first chamber 22. |
