Chapter seven
Pneumatic and hydraulic actuation systems
Objectives
The objectives of this chapter are that, after studying it, the reader should be able to:
- Interpret system drawings, and design simple systems, for sequential control systems involving hydraulic/pneumatic directional control valves and cylinders.
- Explain the principles of process control valves, their characteristics and sizing.
7.1 Actuation systems
Actuation systems are the elements of control systems which are responsible for transforming the output of a microprocessor or control system into a controlling action on a machine or device. Thus, for example, we might have an electrical output from the controller which has to be transformed into a linear motion to move a ...
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