P neumatic control for robotics and industrial （P纽姆符号的控制机器人和工业）.PDF

Pneumatic control for robotics and industrial automation Author: Naresh Raghavan Introduction Pneumatic systems form the most primitive and distinct class of mechanical control engineering. They are classified under the term Fluid Power Control, which describes any process or device that converts, transmits, distributes or controls power through the use of pressurized gas or liquid. When high-pressure liquids (like oil) are used to transmit power, the system is termed as hydraulics. In a pneumatic system the working fluid is a gas (mostly air) which is compressed above atmospheric pressure to impart pressure energy to the molecules. This stored pressure potential is converted to a suitable mechanical work in an appropriate controlled sequence using control valves and actuators. Pneumatic systems are well suited for the automation of a simple repetitive task. The working fluid is abundant in nature and hence the running and maintenance cost of these systems are exceptionally low. All fluids have the ability to translate and transfigure and hence pneumatic systems permit variety of power conversion with minimal mechanical hardware. Conversion of various combinations of motions like rotary-rotary, linear-rotary and linear-linear is possible. The simplicity in design, durability and compact size of pneumatic systems make them well suited for mobile applications. These features make them versatile and find universal applications including robotics, aerospace technology, production and assembly of automotive components (power steering, chassis and engine assembly), CNC machines, food products and packaging industry, bomb deployment units and fabrication process of plastic products. Work piece