Abstract
The research history of pneumatic positioning system is overviewed, and the research work on characteristics study and the development of control valve and control strategy are summarized. The past work shows that the gas flow through valve and tube is complex, the thermodynamic process in a cylinder chamber is a polytropic process with varying polytropic exponent, and the friction force varies while the velocity of the cylinder and the pressures in the two chambers of the cylinder change. After the control valves are developed, the control strategies coped with different kinds of characteristics of the system are promoted, such as nonlinearity compensation strategy, dithering compensation, robust control and same pace PWM. After about 20 years research, the pneumatic positioning systems now have good performances enough to meet the requirements of the manufacturing system.
| Original language | English |
|---|---|
| Pages (from-to) | 10-16 |
| Number of pages | 7 |
| Journal | Jixie Gongcheng Xuebao/Chinese Journal of Mechanical Engineering |
| Volume | 39 |
| Issue number | 12 |
| DOIs | |
| State | Published - Dec 2003 |
Keywords
- Basic characteristics
- Control strategy
- Pneumatic positioning system
- Research development
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