Journal of Mechanical Design, Transactions Of the ASME
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Product and Process Tolerance Allocation in Multistation Compliant Assembly Using Analytical Target CascadingAbstract
Tolerance allocation is the process of determining allowable dimensional variations in products (parts and subassemblies) and processes (fixtures and tools) in order to meet final assembly quality and cost targets. Traditionally, tolerance allocation is conducted by solving a single optimization problem. This "all-in-one" (AIO) approach may ... ...
Journal of Mechanical Design, Transactions Of the ASME - Tập 130 Số 9 - 2008
Prediction of Mechanical Power Loss of Planet Gear Roller Bearings Under Combined Radial and Moment LoadingA modeling methodology is proposed to predict load-dependent (mechanical) power loss of cylindrical roller bearings under combined radial and moment loading with focus on planetary gear set planet bearings. This methodology relies on two models. The first model is a bearing load distribution model to predict load intensities along rolling element contacts due to combined force–moment loadi... ...
Journal of Mechanical Design, Transactions Of the ASME - Tập 135 Số 12 - 2013
Quantification of Model Uncertainty: Calibration, Model Discrepancy, and IdentifiabilityTo use predictive models in engineering design of physical systems, one should first quantify the model uncertainty via model updating techniques employing both simulation and experimental data. While calibration is often used to tune unknown calibration parameters of a computer model, the addition of a discrepancy function has been used to capture model discrepancy due to underlying missi... ...
Journal of Mechanical Design, Transactions Of the ASME - Tập 134 Số 10 - 2012
Kinetostatic Modeling of N-DOF Parallel Mechanisms With a Passive Constraining Leg and Prismatic ActuatorsThis paper introduces several new types of parallel mechanisms with prismatic actuators whose degree of freedom is dependent on a constraining passive leg connecting the base and the platform. A general kinetostatic model is established for the analysis of the structural rigidity and accuracy of this family of mechanisms. The geometric model of this class of mechanisms is first introduced.... ...
Journal of Mechanical Design, Transactions Of the ASME - Tập 123 Số 3 - Trang 375-381 - 2001
Performance Quality and Tolerance Sensitivity of MechanismsThis paper presents a general theory to determine the sensitivity of tolerances to the performance quality of mechanisms and a technique to identify a robust design, which is the least sensitive to the tolerances. The method is demonstrated in position synthesis of linkages. The sensitivity Jacobian is first introduced to relate the performance tolerances and the dimensional tolerances. Th... ...
Journal of Mechanical Design, Transactions Of the ASME - Tập 118 Số 1 - Trang 144-150 - 1996
A Poisson-Based Formulation for Frictional Impact Analysis of Multibody Mechanical Systems With Open or Closed Kinematic ChainsAnalysis of frictional impact in a multibody mechanical system requires a friction model capable of correct detection of all possible impact modes such as sliding, sticking, and reverse sliding. Conventional methods for frictional impact analysis have either shown energy gain or not developed for jointed mechanical system, and especially not for closed-chain multibody systems. This paper p... ...
Journal of Mechanical Design, Transactions Of the ASME - Tập 122 Số 4 - Trang 489-497 - 2000
Multi-Body Impact Motion with Friction—Analysis, Simulation, and Experimental ValidationWhen a multi-body system collides with a single body or with another multi-body system, impact dynamics with friction should be considered. This paper presents a general computer oriented analysis of impact dynamics incorporating friction. The presence of friction between sliding contacts during the impact makes the problem difficult since the events such as reverse sliding or sticking, wh... ...
Journal of Mechanical Design, Transactions Of the ASME - Tập 115 Số 3 - Trang 412-422 - 1993
Dynamics of a Multibody Mechanical System With Lubricated Long Journal BearingsClearances exist in different kinds of joints in multibody mechanical systems, which could drastically affect the dynamic behavior of the system. If the joint is dry with no lubricant, impact occurs, resulting in wear and tear of the joint. In practical engineering design of machines, joints are usually designed to operate with some lubricant. Lubricated journal bearings are designed so th... ...
Journal of Mechanical Design, Transactions Of the ASME - Tập 127 Số 3 - Trang 493-498 - 2005
A Multidomain Engineering Change Propagation Model to Support Uncertainty Reduction and Risk Management in DesignEngineering change (EC) is a source of uncertainty. While the number of changes to a design can be optimized, their existence cannot be eliminated. Each change is accompanied by intended and unintended impacts both of which might propagate and cause further knock-on changes. Such change propagation causes uncertainty in design time, cost, and quality and thus needs to be predicted and cont... ...
Journal of Mechanical Design, Transactions Of the ASME - Tập 134 Số 10 - 2012
Computerized Design, Generation and Simulation of Meshing and Contact of Modified Involute, Klingelnberg and Flender Type Worm-Gear DrivesThe worm and worm-gear tooth surfaces of existing worm-gear drive designs are in line contact at every instant and the gear drive is very sensitive to misalignment. Errors of alignment cause shifting of the bearing contact and transmission errors. Methods for computerized simulation of meshing and contact of misaligned worm-gear drives of existing design are proposed. Also, modification of... ...
Journal of Mechanical Design, Transactions Of the ASME - Tập 118 Số 4 - Trang 551-555 - 1996
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