THE FREQUENCY RESPONSE OF BLOCKED PNEUMATIC LINES.
Abstract
The amplitude frequency response (transfer gain curve) of 0.170 inch I.D. blocked pneumatic lines of the type used in flueric systems was experimentally determined. The ecectric-pneumatic analogy was used, in conjunction with a 'gain envelope' technique, to develop theoretical predictions of the gain curves of blocked pneumatic lines by several theories. Correlation with experiment showed that any theory using a constant pneumatic resistance would be in error when the signal frequency was greater than a characteristic frequency of the line. A high-frequency theory, based on the work of Nichols (The linear properties of pneumatic transmission lines, 'Transactions of the American Society of Mechanical Engineers', no. 2, 79:583-874 (1957)), was developed and, at least, predicted the resonant gains within 2 db and the resonant frequencies within 10 per cent for all signal sizes. A rapid nomographic solution for the gain curve, based on this high-frequency theory, is included. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1966
- Accession Number
- AD0632393
Entities
People
- James Thomas Karam Jr.
Organizations
- Air Force Institute of Technology