NUST Institutions Library Catalogue Search for 'an:"119639"'

System Identification of Vibrational System using GMR Sensor /

By Iltaf, Danial . . 66p. ; 30cm..

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Design and Development of Pneumatic Based PVC Pipe Bending Machine /

By Nazir, Mubashir. . 75p. ; 30cm..

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Design and Development of Cost Effective and Portable Blister Packing Machine /

By Adil, Muhammad Haseeb . . 60p. , Blister Packing is a packaging technique in which plastic (PVC Shell) covering the product to be packed is fused to the cardboard. This equipment is widely used in variety of sectors including pharmaceutical, electronic and hardware industries. Despite having huge applicability in packaging domain, these machines are not affordable for small business setup. The goal of this project is to create portable, cost effective and fundamental blister packing machine which meets local market requirements. Moreover, its manufacturing should be simple and purely based on local materials so that any fault during operations can be recovered by operator using local spares. The concept is based on reverse engineering to develop manual blister packing machine. Blister Packaging of any product by this machine involves several processes. Placing a wooden or metal mold under the heating element before adding the shell to the mold is the foremost step. The product to be packed is placed within the shell and shell is covered with laminated cardboard or boxboard placed on top of the mold. This machine uses heat to create a seal between the PVC shell and the cardboard backing. The thickness of PVC Sheet and its type is taken into consideration while adjusting heating element's temperature. The temperature is kept slightly higher than the point at which sheets softens. Transmission of heat starts upon manual pressing of hand lever. Lever is designed in such a way that it applies regular pressure for uniform distribution of heat with the use of an average person's hand power. In last, hand lever is depressed, and product is allowed to be cooled at room temperature for a short interval to finally pack the requisite product. 30cm.

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Fatigue Testing of Rubber Component with Hybrid Control of Force and Displacement /

By Abbas, Malik Faheem . . 65p. , During the design and development process Mechanical fatigue testing and component life prediction are critical factors for safe and reliable behavior of component. Before being used in real-world applications, parts, components, and prototypes must be fatigue tested to determine how long they will last. A machine setup capable to generate desired load is required for the prediction of component life under continuous loading or under fatigue. The current work displays a fatigue testing system for rubber components that is powered by a pneumatic mechanism. Continuous loading is applied to a rubber component for a predetermined number of cycles, and the resulting load and distance are calculated. The entire system is further separated into two sections: electrical and mechanical. Entire setup comprises of base structure, air compressor, pneumatic cylinder actuator, proportional servo valve, buck module, load cell transducer, laser distance sensor, signal generator, DC power supply, load cell amplifier and Data Acquisition Card. Obtained parameters are transferred into an integrated computer system and Data Analysis is carried out using Lab VIEW. 30cm.

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Path Planning of Robot Motion using Vector Pursuit Method /

By KHAN , SALMAN . . 55p. ; 30cm..

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Aerodynamic Parameter Estimation from Flight Test Data /

. 95p. ; 30cm..

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Aerodynamic Parameter Estimation from Flight Test Data /

By AMIR, MUHAMMAD. . 95p. ; 30cm..

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Modeling, Parameter Identification and Stability Analysis of Vibrating Mechanical Systems /

By Rehman ,Kinza . . 75p. ; 30cm..

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Multi-body Dynamic Modeling of Electric Vehicle with In-wheel Motors for Motion Control Study /

By Riaz ,Namra . . 63p. ; 30cm..

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Portable Vacuum Forming Machine /

By Bhatti ,Aaras Ahmed. . 56p. ; 30cm..

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Tribological Analysis of Bis(2-Ethylhexyl) Phosphate Ionic Liquid Based Bio-Lubricants at Various Operating Conditions /

By Moneeb Butt, Muhammad . . 68p. , Mechanical components involving surface interaction requires lubrication at all costs to reduce friction and wear in order to avoid mechanical failure. Majority of lubricants used around the world are from mineral based sources. These sources are not infinite and pose danger to the environment due their toxic nature and disposal problems. This awareness has given rise to the formation of environmental friendly lubricants which are obtained from renewable sources such as bio-lubricants. The low thermal stability of bio-lubricants has caused the limitation on it use as compared to mineral based oils. Certain additives are used to increase the thermal stability of these bio-lubricants and further enhance their tribological properties. Ionic liquids are the most common solvents used as an additive to the bio-lubricants. These organic salts are environmentally friendly and have proved to be beneficial to the tribological properties of bio-lubricants. The extent to their effectiveness in enhancing the tribological performance of a lubricants greatly depends upon compatibility and its miscibility. Ionic liquids are generally composed of anions and cations and make strong interaction with polar base oils. In this research work, Bis (2-Ethylhexyl) phosphate ionic liquid was used an additive to the base test lubricants including PAO and bio-lubricants as Cotton seed oil (CSO), Rattan jot oil (RJO), Waste cooking oil (WCO) at various operating conditions. A four ball tribometer was used to perform the tests for all lubricants with and without the addition of ionic liquid as an additive. To analyze the wear scar diameter on each sample a digital microscope was used. Results were obtained and analyzed, and it was found that addition of ionic liquid has not much improved the performance of PAO but significant effects can be seen for the case of bio lubricants. Where CSO performed best at lower operating loads and RJO performed best at higher operating loads due to its inherent load carrying capacity 30cm..

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Experimental Tribological Study of Surface Textured Valve Train Components /

By Siddiqui, Muhammad Rizwan. . 208p. , Reducing wear and friction in mechanical components is critical for enhancing energy efficiency and extending the operational lifespan of engine systems. Recent approaches to friction reduction have focused on lubricant chemistry, surface coatings, and surface modifications. This study explores how micro-texturing can enhance the tribological performance of Thermo-Elastohydrodynamically Lubricated (TEHL) cam-tappet contacts in direct-acting valvetrains. This research uses a two-phase experiment to assess how surface texture area density affects friction under realistic engine conditions. Fiber laser texturing was utilized to create micro-dimples on five tappet shim samples with controlled texture densities of 2%, 5%, 8%, 10%, and 12%. In the first phase, a modified reciprocating tribometer was used to compare untextured and textured shims, leading to the selection of three optimal texture densities (5%, 8%, and 10%). In the second phase, a production engine valvetrain was used to test the selected textured shims under realistic conditions. Consistent tappet components were used to prevent bore friction variations. Friction was measured at various camshaft speeds (300, 500, 700, and 900 RPM) and temperatures (30°C, 60°C, and 90°C), with both the tappet and shim rotating under real conditions. Such a scenario has not been previously explored in existing studies. The analysis focused on the instantaneous frictional torque difference between untextured and textured shims. Results demonstrated a significant reduction in friction, with textured shims achieving up to 18.33% lower friction at 90°C. Among the tested textures, the 8% textured shim exhibited the most consistent friction reduction performance across all engine speeds. The results demonstrate the potential of micro-surface texturing to reduce friction in camtappet contacts within valvetrain systems of internal combustion engines. The promising results offer a pathway toward realizing a more efficient engine. This research offers valuable experimental data and highlights the need to further explore and optimize surface texturing for wider automotive applications. 30cm.

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