SGD-4: Special test rig for metrological analysis and certification of multipoint pressure modules

Micro Air Vehicle, or also commonly known as MAV, is a miniature aircraft that has been gaining interest in the industry. MAV is defined as a flying platform with 15cm wingspan and operates at a speed of around 10m/s. Recently, MAV has been exposed with the latest development and link towards the biologically-inspired designs such as morphing wing. Twist morphing wing is one of the latest MAV wing design developments. The application of Twist Morphing (TM) on MAV wing has been previously known to produce better aerodynamic performance. Previous study in washin TM wing has shown a promising possibility of generating higher lift force. Despite the benevolent performance exhibited by the washin TM wing, the lift distribution for the washout type of TM MAV is relatively unknown and still open to be explored. This is probably due to the lack of experimental test rig to produce the washout twist morphing motion on the MAV wing. Therefore, this research aims to produce a special test rig for washout TM wing that is compatible for wind tunnel experimental testing. By using the special test rig, the experimental investigation on the lift performance of washout TM MAV wing can be done. Based on the wing deformation results, it clearly shows that the proposed test rig is capable to produce up to 19.5mm tip deflection at the morphing point, which is also resulting in a significant morphing motion. Higher morphing force induces larger morphing motion. Based on the lift distribution results, they show that the morphing motion has significantly affected the overall lift distribution on the MAV wing. The morphing motion on TM wing has produced at least 17.6% and 5.33% lower CL and CLmax magnitude, respectively, with the membrane wing especially at the pre-stall region. However, the TM wing is still able to maintain the stall angle similar to the baseline wing at αstall= 31°. By maintaining high αstall value with lower CL and CLmax magnitude, TM wing produces more agility for the MAV maneuverability that will be useful for indoor mission or obstacle avoidance flight.

Download Full-text

Design of a Test Rig for the Examination of Mechanical Properties of Rolling Bearings

Management Systems in Production Engineering ◽

10.1515/mspe-2017-0003 ◽

2017 ◽

Vol 25 (1) ◽

pp. 22-28 ◽

Cited By ~ 2

Author(s):

Rafał Jurecki ◽

Edward Pokropiński ◽

Dariusz Więckowski ◽

Łukasz Żołądek

Keyword(s):

Mechanical Properties ◽

Test Facility ◽

Machine Component ◽

Special Test ◽

Test Rig ◽

Rolling Bearings ◽

Design Basis ◽

Simulation Testing ◽

Operational Factors ◽

The Impact

AbstractThe paper presents a design basis adopted for the construction of a test facility for the rig testing of rolling bearings. One of the methods of inspection of the bearings is the testing of the bearings as components having already been mounted in a specific machine component unit and tested in the conditions of operation of the unit as a whole. This article presents preliminary engineering requirements and the design of a special test rig for the examination of rolling bearings without the necessity of mounting the bearings in a specific machine component unit. The rig testing is widely used in consideration of numerous good points of such a method. The simulation testing of bearings (on test rigs) consists in reproducing as accurately as possible the real conditions of operation of the bearings when mounted in the device for which they are intended. The rigs used for such tests are complicated and expensive, but the results of such tests are more “reliable” and more accurately represent the impact of various operational factors (loads) on the durability of the bearings under test.

Download Full-text

Experiment of Effects of Oil Volume-Per-Cycle on Oil Film’s Thickness under Oil-Air Lubrication

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.620.476 ◽

2014 ◽

Vol 620 ◽

pp. 476-480

Author(s):

Qi Guo Sun ◽

Zheng Hui Zhou ◽

Yue Fei Wang

Keyword(s):

Annular Flow ◽

Evaluation Criterion ◽

Lubrication System ◽

Special Test ◽

Test Rig ◽

Two Phase ◽

Oil Film ◽

System Experiment ◽

Air Lubrication

Abstract: Thickness of oil film, a parameter of an oil-air lubrication system, is an important evaluation criterion for two-phase annular flow flowed in the system. Experiment of the effects of oil volume-per-cycle on oil film’s thickness is done on a special test rig using ECT technology, and then the changing rule of oil film’s thickness is analyzed in this paper. The results show that, at the first the thickness of oil film is thinness and weakness, and then it changes to thickness and stabilization, at the last the oil focusing on the bottom of tube. The break of annular flow and the blocking of oil at elbow tube have been studied experimentally and theoretically.

Download Full-text

Workshop Testing of GT140P: Part 1 — Test Program and Test Arrangement

Volume 3: Heat Transfer; Electric Power; Industrial and Cogeneration ◽

10.1115/99-gt-242 ◽

1999 ◽

Author(s):

Knud Knudsen ◽

Jonas Larsson ◽

Ulf Nilsson ◽

Per Thörnblad

Keyword(s):

Gas Turbine ◽

Power Plants ◽

Special Test ◽

Test Rig ◽

Gas Turbine Combustor ◽

Test Program ◽

On Line

Based on the experience from operation of 75 MW PFBC power plants in Sweden, Spain and USA, development of a gas turbine for a larger PFBC plant started in 1990. Before delivery to its user in Japan the first machine underwent extensive testing. A special test rig was built in one of ABB STAL’s workshops in Finspong Sweden. In the absence of the regular coal-fired PFBC combustor a silo-type gas turbine combustor was installed to supply power. Permanent and temporary instrumentation, together more than 1200 gauges, were installed and data was displayed for on-line monitoring and recorded for analysis. This paper describes the design of GT140P, the test program and the test arrangements.

Download Full-text

A study on prediction & validation of meshing gear pair backlash under various manufacturing and assembly errors

MATEC Web of Conferences ◽

10.1051/matecconf/201928707001 ◽

2019 ◽

Vol 287 ◽

pp. 07001

Author(s):

Bahadır Karba ◽

Nihat Yıldırım ◽

Fatih Erdoğan ◽

Mert Vardar

Keyword(s):

Experimental Setup ◽

Experimental Measurements ◽

Gear Pair ◽

Special Test ◽

Test Rig ◽

Gear Mesh ◽

Manufacturing Errors ◽

Meshing Gears ◽

Center Distance

Backlash is a need for proper gear mesh but also a defect if not controlled closely. Few studies have focused on controlling backlash with some mechanical solutions that can be applied. Few other studies have shown interest in estimation of minimum / maximum variable backlash. The operating backlash of meshing gears is affected by many factors among which runouts, pitch errors and tooth thicknesses are the three most pronounced manufacturing errors. All these three parameters are the measurable ones once the gears are manufactured. Center distance and phasing of meshing gears are the examples of assembly errors which may affect the operating backlash. A software has been developed to predict likely maximum and minimum backlash of a gear pair selected arbitrarily and assembled together. For the validation of software predictions an experimental setup is needed for backlash measurements. Thus, a special test rig is designed and constructed for experimental measurements of the operating backlash under some manufacturing and assembly errors of a gear pair. Good agreements have been achieved between backlash predictions and measurements thus validating the in-house prepared software for backlash calculations.

Download Full-text

Adapter Errors in Indicator Diagrams of Combustion Engines

Proceedings of the Institution of Mechanical Engineers ◽

10.1243/pime_proc_1977_191_018_02 ◽

1977 ◽

Vol 191 (1) ◽

pp. 125-134 ◽

Cited By ~ 4

Author(s):

C. Van Aken

Keyword(s):

Experimental Study ◽

Method Of Characteristics ◽

Simulation Models ◽

Theoretical Treatment ◽

Combustion Engines ◽

Special Test ◽

Test Rig ◽

The Method Of Characteristics ◽

Simple Simulation

A comprehensive experimental study of the distortion and resonance in adapters is made on a special test rig and on combustion engines. A theoretical treatment of the phenomenon is made, using simple simulation models and the method of characteristics.

Download Full-text