Operator's, organizational, direct support, and general support maintenance manual : radio test set AN/PRM-32A (NSN 6625-01-013-9900).

"December 1978."

Operator's and organizational maintenance manual : test set, receiver AN/ARM-180, (NSN 6625-01-041-4161).

Includes index.

General support maintenance repair parts and special tools lists (including depot maintenance repair parts and special tools) for radio test set AN/ARM-92B, (NSN 6625-00-631-5501).

Includes index.

Direct support maintenance manual : test set, laser infrared observation device TS-3620/GVS-5 (NSN 5860-01-052-9477).

Includes index.

Operator's and aviation unit maintenance manual : test set, countermeasures set TS-3615/ALQ-136(V) (NSN 6625-01-121-8984).

"23 February 1984"--P. i.

Organizational maintenance manual : radio test set AN/GRM-114A, (NSN 6625-01-144-4481).

"20 June 1983."

Operator's manual : AN/USM-465A test set, digital card tester (NSN 6625-01-126-2473).

Includes index.

Operator's and organizational maintenance manual : test set, electronic circuit plug-in unit, TS-3317( )/TSQ-73 (NSN 1430-01-033-1078).

"14 May 1984."

Transportability guidance : Foward Area Alerting Radar system (FAAR) : radar set, AN/MPQ 49, (NSN 1430-00-179-4199), truck, cargo, 1 1/4-ton, M561, (NSN 2320-00-873-5407), trailer, cargo, 3/4-ton, M101A1, (NSN 2330-00-898-6779), test set, radar, AN/MPM 57, (NSN 4935-00-178-0833).

"January 1976."

Operator's, organizational, direct support, and general support maintenance manual : test set, electronic (DSESTS-M1/FVS) (4931-01-120-0764).

Includes index.

Aviation unit and aviation intermediate mainenance manual (including repair parts and special tools list) : test set, armament subsystem, M16 (4933-00-056-0202).

"January 1972."

Non-contact test set-up for aeroelasticity in a rotating turbomachine combining a novel acoustic excitation system with tip-timing

Due to trends in aero-design, aeroelasticity becomes increasingly important in modern turbomachines. Design requirements of turbomachines lead to the development of high aspect ratio blades and blade integral disc designs (blisks), which are especially prone to complex modes of vibration. Therefore, experimental investigations yielding high quality data are required for improving the understanding of aeroelastic effects in turbomachines. One possibility to achieve high quality data is to excite and measure blade vibrations in turbomachines. The major requirement for blade excitation and blade vibration measurements is to minimize interference with the aeroelastic effects to be investigated. Thus in this paper, a non-contact-and thus low interference-experimental set-up for exciting and measuring blade vibrations is proposed and shown to work. A novel acoustic system excites rotor blade vibrations, which are measured with an optical tip-timing system. By performing measurements in an axial compressor, the potential of the acoustic excitation method for investigating aeroelastic effects is explored. The basic principle of this method is described and proven through the analysis of blade responses at different acoustic excitation frequencies and at different rotational speeds. To verify the accuracy of the tip-timing system, amplitudes measured by tip-timing are compared with strain gage measurements. They are found to agree well. Two approaches to vary the nodal diameter (ND) of the excited vibration mode by controlling the acoustic excitation are presented. By combining the different excitable acoustic modes with a phase-lag control, each ND of the investigated 30 blade rotor can be excited individually. This feature of the present acoustic excitation system is of great benefit to aeroelastic investigations and represents one of the main advantages over other excitation methods proposed in the past. In future studies, the acoustic excitation method will be used to investigate aeroelastic effects in high-speed turbomachines in detail. The results of these investigations are to be used to improve the aeroelastic design of modern turbomachines.

一种基于安全状态转移的简并测试集生成方法

在总结前人工作的基础上,结合安全操作系统对测试的特殊需求,提出了简并测试集(degenerate test set,简称DTS)的概念,设计了一种使用模型检测的基于安全状态转移的高效测试集生成方法.该方法以状态转移为化简对象,在利用模型检测技术生成测试用例的同时,归并相同的状态转移并化简需求集中的冗余属性,从而最终达到化简测试集的目的.在此基础上,探讨了单个用例失败时用例集的有效性问题,并对DTS生成算法进行了改进.实验结果表明,该方法可以有效地对测试集中的冗余进行化简.

On Minimization of Peak Power for Scan Circuit during Test

Scan circuit generally causes excessive switching activity compared to normal circuit operation. The higher switching activity in turn causes higher peak power supply current which results into supply, voltage droop and eventually yield loss. This paper proposes an efficient methodology for test vector re-ordering to achieve minimum peak power supported by the given test vector set. The proposed methodology also minimizes average power under the minimum peak power constraint. A methodology to further reduce the peak power below the minimum supported peak power, by inclusion of minimum additional vectors is also discussed. The paper defines the lower bound on peak power for a given test set. The results on several benchmarks shows that it can reduce peak power by up to 27%.

On the utility of an instrumented impact set-up to characterise the response of discontinuous buffer strips in carbon–epoxy systems in dry and wet conditions

The use of an instrumented impact test set-up to evaluate the influence of water ingress on the impact response of a carbon–epoxy (C–E) laminated composite system containing discontinuous buffer strips (BS) has been examined. The data on the BS-free C–E sample in dry conditions are used as reference to compare with the data derived from those immersed in water. The work demonstrated the utility of an instrumented impact test set-up in characterising the response, first owing to the architectural difference due to introduction of buffer strips and then due to the presence of an additional phase in the form of water ingressed into the sample. The presence of water was found to enhance the energy absorption characteristics of the C–E system with BS insertions. It was also noticed that with an increasing number of BS layer insertions, the load–time plots displayed characteristic changes. The ductility indices (DI) were found to display a lower value for the water immersed samples compared to the dry ones.