Engineering topics
Kolaini, Ali R
Publications and source records attributed to Kolaini, Ali R.
NASA Handbook 7005: Dynamics Environmental Criteria
Since the NASA-HDBK-7005 first released in 2001, oversights and imprecise language leading to misinterpretations have been identified in the handbook and new issues in the discipline have arisen that need to be addressed. The majority of the technology described in handbook is mature and is standard practice among experts in the discipline. Advances in the discipline have been made in several areas and clarifications are needed in some of existing material. Many of these advances and clarifications are a product of new NASA launch vehicle program. The revision of the 7005 handbook benefits current NASA manned space flight program, NASA’s numerous unmanned space missions, and the community at large. A community wide contribution is made and numerous suggestions have been offered for the revision. This paper summarizes sections of the handbook that have gone through significant revisions.
NASA Handbook 7010: Direct Field Acoustic Testing
Instruments, spacecraft, antennas, reflectors, and other mechanical hardware have been undergoing acoustic qualification testing over the last decade using loudspeakers. This speaker-generated Direct Field Acoustic Test (DFAT) method offers cost, mobility, and schedule advantages over the conventional Reverberant Acoustic Field Test (RAFT) method. To develop most appropriate acoustic test program using the DFAT method for a flight project, flight project managers and their technical staffs will need overall guidance and technical rational for using DFAT to qualify flight hardware for acoustic environments. The NASA Chief Engineer Office had tasked JPL to prepare a NASA Handbook for DFAT Dynamics Testing. The handbook was completed and was released by NASA headquarters in 2015. The handbook provides advantages and disadvantages of such method of testing, key references and a series of recommended practices for test preparation and test performance. This paper will summarize key and important steps related to this method of acoustic testing.