Accession Number:

AD0411841

Title:

INVESTIGATIONS OF THRUST COMPENSATION METHODS,

Descriptive Note:

Corporate Author:

ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AIR FORCE STATION TENN

Personal Author(s):

Report Date:

1963-08-01

Pagination or Media Count:

1.0

Abstract:

This report deals with the problem of obtaininurements of transient thrust when the time records are distorted by the dynamics of the stand. It is shown that analog computer tech niques may be used to compute the thrust tran sients when an electrical signal proportional to either the displacement, the velocity, or the acceleration is available and when the constants of the system are known. However, it is also shown that an indirect analog computer method may be used when the displacement history is known in this method the dynamics of the thrust stand are simulated and the input to the simulated system is forced to approach the actual thrust by feedback techniques. An example thrust transient problem istreated using this technique, and a small analog system for applying the method is described. It is also shown that there is no immediate advantage in increasing the natural frequency of a stand by lowering its compliance. The philosophy is developed that the emphasis in thrust stand design should be directed toward well defined dynamics at natural frequencies within practicality then the system may be com pensated to obtain true thrust transients. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE