Accession Number : AD0269247

Title :   GYRO TEMPERATURE CONTROL WITH A LIQUID SOURCE

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE INSTRUMENTATION LAB

Personal Author(s) : MARSHALL,R.E. ; JANSSON,R.M.

Report Date : MAR 1960

Pagination or Media Count : 1

Abstract : The thermal and fluid conditions that exist in the test gimbal and fluid jacket are described. Fluid flow rates in the fluid jacket closely govern the gyro heat transfer performance and improvements in this flow rate will substantially raise this performance. Coupled to this is the close attention that must be paid to all heat transfer parameters about the Test Gimbal, evidenced by the changes in the surrounding insulation. Several improvements are needed to yield test conditions that fully simulate system conditions. Notable ambient sensitivities are still present in the test unit. Fluid temperature loss-gain profiles, shows that the thermal conduction losses of the gyro mountings are great enough to prevent any fluid temperature gain with power on. This situation can be corrected by installing small auxiliary heaters on the gyro mounting blocks to make up for these conduction losses. The second correctable condition involves the temperature controller sensitivities and time constants. Experience has shown that these factors are not in line with similar types of control units. Only with a precise description of all the thermal conditions in both the laboratory test unit and the system can the required accuracies of gyro instruments be realized in operational systems. (Author)

Descriptors :   *GIMBALS, *HEARING, BOUNDARY LAYER, FLUID FLOW, HEAT, HEAT TRANSFER, LIQUIDS, TEMPERATURE CONTROL, TEST METHODS

Distribution Statement : APPROVED FOR PUBLIC RELEASE