Army/NASA Small Turboshaft Engine Digital Controls Research Program.
Abstract
A cooperative Army/NASA program to conduct digital controls research for small turboshaft engines is described. The participating agencies are the Army TRL Propulsion Laboratory and NASA Lewis Research Center. The emphasis of the program is on engine test evaluation of advanced control logic using a flexible microprocessor-based digital control system. The engine test facility is an indoor sea-level stand. It includes a 2500-hp eddy-current dynamometer to adsorb engine shaft horsepower. The dynamometer control system provides capability to change the torque vs. speed characteristics of the load, thus permitting various rotor systems to be simulated. Flywheels are used to simulate various rotor moments of inertia. The dynamometer controls are designed to provide full-range load changes in less than 1 second. This provides the capability to evaluate system response to rapid load changes such as those induced by collective or cyclic pitch transients in actual flight. The digital control system usd in this program is designed specifically for research on advanced control logic. Control software is stored in programmable memory. New control algorithms may be stored in a floppy disk and loaded directly into memory. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1982
- Accession Number
- ADA122874
Entities
People
- A. N. Baez
- G. A. Bobula
- J. F. Sellers
Organizations
- National Aeronautics and Space Administration