Journal of Mechanical Design, Transactions Of the ASME
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A Method for the Design of Compliant Mechanisms With Small-Length Flexural PivotsCompliant or flexible-link mechanisms gain some or all of their motion from the relative flexibility of their joints rather than from rigid-body joints only. Unlike rigid-body mechanisms, energy is not conserved between the input and output ports of compliant mechanisms because of energy storage in the flexible members. This effect and the nonlinearities introduced by large deflections com... ...
Journal of Mechanical Design, Transactions Of the ASME - Tập 116 Số 1 - Trang 280-290 - 1994
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
An Efficient Pareto Set Identification Approach for Multiobjective Optimization on Black-Box FunctionsBoth multiple objectives and computation-intensive black-box functions often exist simultaneously in engineering design problems. Few of existing multiobjective optimization approaches addresses problems with expensive black-box functions. In this paper, a new method called the Pareto set pursuing (PSP) method is developed. By developing sampling guidance functions based on approximation m... ...
Journal of Mechanical Design, Transactions Of the ASME - Tập 127 Số 5 - Trang 866-874 - 2005
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
Prediction of Mechanical Efficiency of Parallel-Axis Gear PairsAbstract A computational model is proposed for the prediction of friction-related mechanical efficiency losses of parallel-axis gear pairs. The model incorporates a gear load distribution model, a friction model, and a mechanical efficiency formulation to predict the instantaneous mechanical efficiency of a gear pair under typical operating, surface, and lubrication... ...
Journal of Mechanical Design, Transactions Of the ASME - Tập 129 Số 1 - Trang 58-68 - 2007
Three Dimensional Absolute Nodal Coordinate Formulation for Beam Elements: Implementation and ApplicationsThis part of these two companion papers demonstrates the computer implementation of the absolute nodal coordinate formulation for three-dimensional beam elements. Two beam elements that relax the assumptions of Euler-Bernoulli and Timoshenko beam theories are developed. These two elements take into account the effect of rotary inertia, shear deformation and torsion, and yet they lead to a ... ...
Journal of Mechanical Design, Transactions Of the ASME - Tập 123 Số 4 - Trang 614-621 - 2001
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
Comparison of Polynomial Cam Profiles and Input Shaping for Driving Flexible SystemsPolynomial profiles can be used as reference commands to limit induced vibration in flexible systems. Due to their ease of design and low-pass filtering effects, polynomial profiles are often found in cam-follower systems. Polynomial profiles have also been used as smooth reference commands for automated machines. However, despite extensive work to develop and improve such profiles, inhere... ...
Journal of Mechanical Design, Transactions Of the ASME - Tập 134 Số 12 - 2012
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
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