Characterizing the Effect of Microarchitecture Design Parameters on Workload Dynamic Behavior

2007 ◽  
Author(s):  
Chang-Burm Cho ◽  
Wangyuan Zhang ◽  
Tao Li
Keyword(s):  
Dynamic Behavior ◽  
Design Parameters

The effects of design parameters on the dynamic behavior of organic ranking cycle for the engine waste heat recovery

Energy ◽  
2018 ◽  
Vol 147 ◽  
pp. 440-450 ◽  
Author(s):  
Xuan Wang ◽  
Gequn Shu ◽  
Hua Tian ◽  
Peng Liu ◽  
Dongzhan Jing ◽  
...  
Keyword(s):  
Dynamic Behavior ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Design Parameters

scholarly journals Dynamic Analysis of Noncontacting Face Seals

1982 ◽  
Vol 104 (4) ◽  
pp. 460-468 ◽  
Author(s):  
I. Etsion
Keyword(s):  
Dynamic Behavior ◽  
Degrees Of Freedom ◽  
Approximate Expression ◽  
Operating Conditions ◽  
Design Parameters ◽  
Seal Ring ◽  
Critical Stability ◽  
Dimensionless Groups ◽  
Stability Maps ◽  
Metal Bellows

The dynamic behavior of a noncontacting coned face seal is analyzed for the case of a rigidly mounted rotating seat and a flexibly mounted stationary ring taking into account various design parameters and operating conditions. The primary seal ring motion is expressed by a set of nonlinear equations for three degrees of freedom. These equations, which are solved numerically, allow identification of two dimensionless groups of parameters that affect the seal dynamic behavior. Stability maps for various seals are presented. These maps contain a stable-to-unstable transition region in which the ring wobbles at half the shaft frequency. The effect of various parameters on seal stability is discussed and an approximate expression for critical stability is offered. The theoretical model assumes frictionless flexible mounting of the seal ring such as in metal bellows. However, the results for critical stability can also be used as an upper limit for cases when friction in the secondary seal is present.

Dynamic Behavior of Piezoelectric Recurve Actuation Architectures

2004 ◽  
Vol 126 (1) ◽  
pp. 37-46 ◽  
Author(s):  
James D. Ervin ◽  
Diann E. Brei
Keyword(s):  
Dynamic Behavior ◽  
Architectural Design ◽  
Dynamic Models ◽  
Dynamic Performance ◽  
Design Parameters ◽  
New Family ◽  
State Frequency ◽  
Actuation Scheme ◽  
The Impact ◽  
High Work

A new family of piezoelectric actuators, called Recurves, exhibits high work per volume and have the extra benefit of performance and packaging tailorability. The focus of this paper is the dynamic performance of this novel actuation scheme. Two dynamic models, a detailed transfer matrix model and a simpler rod approximation model, are presented to predict the steady state frequency response of a general Recurve actuator driving a mass and spring load. Results from a 23 design of experiments are given that validate these models and demonstrate the impact of the architectural design parameters on the dynamic behavior of a generic Recurve actuator.

Dynamic behavior of gear pumps: effect of variations in operational and design parameters

Meccanica ◽  
2010 ◽  
Vol 46 (6) ◽  
pp. 1191-1212 ◽  
Author(s):  
Emiliano Mucchi ◽  
Giorgio Dalpiaz ◽  
Alessandro Rivola
Keyword(s):  
Dynamic Behavior ◽  
Design Parameters ◽  
Gear Pumps

Multiobjective approach developed for optimizing the dynamic behavior of incremental linear actuators

2014 ◽  
Vol 33 (3) ◽  
pp. 953-964 ◽  
Author(s):  
Imen Amdouni ◽  
Lilia El Amraoui ◽  
Frédéric Gillon ◽  
Mohamed Benrejeb ◽  
Pascal Brochet
Keyword(s):  
Multiobjective Optimization ◽  
Dynamic Model ◽  
Dynamic Behavior ◽  
Pareto Front ◽  
Computing Time ◽  
Design Parameters ◽  
Parallel Optimization ◽  
Optimization Approach ◽  
Content Type ◽  
Linear Actuators

Purpose – The purpose of this paper is to develop an optimal approach for optimizing the dynamic behavior of incremental linear actuators. Design/methodology/approach – First, a parameterized design model is built. Second, a dynamic model is implemented. This model takes into account the thrust force computed from a finite element model. Finally, the multiobjective optimization approach is applied to the dynamic model to optimize control as well as design parameters. Findings – The Pareto front resulting from the optimization approach (or the parallel optimization approach,) is better than the Pareto, which is obtained from the only application of MultiObjective Genetic Algorithm (MOGA) method (or parallel MOGA with the same number of optimization approach objective function evaluations). The only use of MOGA can reach the region near an optimal Pareto front, but it consumes more computing time than the multiobjective optimization approach. At each flowchart stage, parallelization leads to a significant reduction of computing time which is halved when using two-core machine. Originality/value – In order to solve the multiobjective problem, a hybrid algorithm based on MOGA is developed.

Full Electromechanical Optimization of Shunted Piezoelectric Patch for Controlling Elastodynamic Waves’ Power Flow

2012 ◽  
Author(s):  
Flaviano Tateo ◽  
Tianli Huang
Keyword(s):  
Wave Propagation ◽  
Dynamic Behavior ◽  
Power Flow ◽  
Real Life ◽  
Design Parameters ◽  
Actual System ◽  
Energy Diffusion ◽  
Proper Design ◽  
Large Frequency ◽  
Diffusion Properties

Wave propagation and energy diffusion in smart structures with shunted piezoelectric patches are examined in this study. The dynamic behavior of a structure can be modified through piezoelectric shunts with negative capacitance. This technique is extremely interesting, as it controls the dynamic behavior of the structure in a large frequency range. The effects of this piezoelectric shunt are studied via a wave propagation approach, and energy diffusion properties of specific wave modes in the structure can be obtained. However, for a proper design of the overall structure, a finer analysis of the real-life circuit is required. The aim of the present work is indeed to establish some essential rules that will guide one to choose more suitable design parameters for the actual system.

Modeling and Experimental Characterization of the Dynamic Behavior of Piezoelectric Recurve Actuation Architectures

1999 ◽  
Author(s):  
James D. Ervin ◽  
Diann E. Brei
Keyword(s):  
Dynamic Behavior ◽  
Architectural Design ◽  
Dynamic Models ◽  
Dynamic Performance ◽  
Design Parameters ◽  
New Family ◽  
State Frequency ◽  
Actuation Scheme ◽  
The Impact

Abstract There are numerous applications that require fast actuators to deliver specific force and displacement output while fitting into confined spaces. A new family of piezoelectric actuators called Recurves exhibit high work per volume and have the extra benefit of having both the force-deflection performance and packaging tailorable to fit the requirements of a given application. The focus of this paper is the dynamic performance of this novel actuation scheme. Two dynamic models, a detailed transfer matrix model and a simpler rod approximation model, are presented to predict the steady state frequency response of a general Recurve actuator driving a mass and spring load. Results from a 23 design of experiments are given that validate these models and demonstrate the impact of the architectural design parameters on the dynamic behavior of the general Recurve actuator.

scholarly journals Vibration Analysis of Radial Compressor Impellers

1983 ◽  
Author(s):  
J. Wachter ◽  
H. Celikbudak
Keyword(s):  
Dynamic Behavior ◽  
Natural Frequencies ◽  
Mode Shapes ◽  
Design Parameters ◽  
Centrifugal Impeller ◽  
Structural Dynamic ◽  
Experimental Procedure ◽  
Radial Compressor ◽  
Comparison Of The Results ◽  
Important Design

There are many problems facing the designers of turbomachines with the demand for ever increasing capabilities and reliability. One problem that requires considerable attention is the vibration characteristics of some components. It is object of this work to determine the dynamic behavior, namely natural frequencies, mode shapes of a centrifugal impeller which are being important design parameters in order to avoid costly failures in the development phase. This work divides into three sections. First, a Finite Element structural dynamic analysis is presented. Then experimental procedure used to determine the natural frequencies and mode shapes is described together with the comparison of the results obtained both theoretically through FEM and experimentally. Finally, interferometric holography technique is used as a means for obtaining the dynamic behavior of the impeller.

Dynamic Analysis of Planar Multibody Systems Considering Contact Characteristics of Ball Bearing Joint

2021 ◽  
pp. 2150159
Author(s):  
Yu Chen ◽  
Kailei Liu ◽  
Rui Qiu ◽  
Chengtao Yu ◽  
Xianfei Xia ◽  
...  
Keyword(s):  
Dynamic Analysis ◽  
Dynamic Behavior ◽  
Multibody Systems ◽  
Ball Bearing ◽  
Multibody System ◽  
Design Parameters ◽  
Continuous Contact ◽  
Coulomb’S Friction ◽  
Driving Speed ◽  
Selection Of

A comparative study of dynamic analysis for planar multibody systems with ball bearing joints is conducted in this study. The transmission mechanism is used as the exemplar case for illustrating the effect of ball bearing joints on the dynamic behavior of multibody systems. To reflect the energy loss, the models of continuous contact force and modified Coulomb’s friction are considered in the kinematic equations for the multibody system with ball bearing joint. With this, the dynamic characteristics of the mechanism are studied. Meanwhile, an experimental platform is built to generate the test data for demonstrating the effectiveness and correctness of the proposed method. Moreover, the effects of driving speed and clearance size on the dynamic behavior of the multibody system are investigated. The numerical results indicate that the dynamic behavior of the mechanical system is sensitive to the variation of the design parameters and the selection of parameters can affect greatly the accuracy of the mechanism with clearance joints.

Dynamic Analysis of a Ramp-Roller Clutch

1997 ◽  
Author(s):  
Chin-Tzung Chang ◽  
Ali A. Seireg
Keyword(s):  
Dynamic Analysis ◽  
Dynamic Behavior ◽  
Arbitrary Function ◽  
Settling Time ◽  
Phase Shifting ◽  
Design Parameters ◽  
Mechanical Function ◽  
Function Generator ◽  
Function Generation ◽  
Damping Characteristics

Abstract This study deals with the design and dynamic analysis of a ramp-roller clutch which can be utilized in developing a mechanical function generator. The dynamic behavior with non-linear torsional spring and damping characteristics is first investigated. Three major design parameters are identified and further optimized for the objective of minimizing the settling time. As a result of underdamping, undesired vibration can occur during the engagement. In order to minimize these unwanted vibrations, coulomb dampers are considered. By adding a properly tuned auxiliary damper, the settling time can be significantly reduced. An example is also given to illustrate the use of one-directional clutches for mechanical function generation where an arbitrary function is synthesized by sequentially triggering 7 clutches. Phase shifting is incorporated in the to reduce the error in the generated function.

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