| Title | A Comparative Study of the Ride Quality of TRACV Suspension Alternatives |
|---|---|
| Record ID | 48628 |
| Personal Name Creator |
Luhrs, R. A.; Sweet, L. M.; Curtiss, H. C., Jr. |
| Source | 132p. in various pagings |
| Corporate Creator | John A. Volpe National Transportation Systems Center (U.S.) |
| Publisher | United States. Dept. of Transportation. Research and Special Programs Administration |
| Publication Date | 19790601 |
| Language | English |
| Abstract | A linearized model of the pitch-heave dynamics of a Tracked Ram Air Cushion Vehicle is presented. This model is based on aerodynamic theory which has been verified by wind tunnel and towed model experiments. The vehicle is assumed to be equipped with two controls which can be configured to provide various suspension system characteristics. The ride qualities and dynamic motions of the rigid vehicle moving over a guideway described by roughness characteristics typical of highways is examined in terms of the rms values of the vertical acceleration in the foremost and rearmost seats in the passenger cabin and the gap variations at the leading and trailing edges of the vehicle. The improvement in ride qualities and dynamic behavior which can be obtained by passive and active suspension systems is examined and discussed. Optimal regulator theory is employed to design the active suspension system. The predicted rms values of the vertical acceleration in the one-third octave frequency bands are compared with the vertical ISO Specification. It is shown that marked improvements in the ride qualities can be obtained with either the passive or active suspension systems. |
| Rosap ID | dot:10135 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/10135 |
| TRT Terms | Aerodynamics; Air cushion vehicles; Computer programming; Dynamic tests; Equations of motion; Ground effect; Intelligent transportation systems; Mathematical models; Pitch (Dynamics); Rapid transit; Ride quality; Suspension systems; Tracked air cushion vehicles; Wind tunnels |
| Classification | NTL - PLANNING AND POLICY - Transit Planning and Policy; NTL - PUBLIC TRANSPORTATION - Transit Safety and Security; NTL - PUBLIC TRANSPORTATION - Social Impacts; NTL - PUBLIC TRANSPORTATION - PUBLIC TRANSPORTATION; NTL - SAFETY AND SECURITY - Vehicle Design; NTL - SAFETY AND SECURITY - Human Factors; NTL - SAFETY AND SECURITY - Transit Safety and Security |
| Geographical Coverage |
United States |
| Contract Number | DOT-TSC-682 |
| Report Number | DOT-TSC-RSPA-78-23 |
| Resource type | Tech Report |
| URL | https://ntlrepository.blob.core.windows.net/lib/48000/48600/48628/DOT-TSC-RSPA-78-23.pdf |
| Format | |
| Database | NTL Digital Repository |