Modeling and Vibration Control of a Drum-Type Washing Machine via MR Fluid Dampers

[[abstract]]In this paper, a multibody dynamic model is developed for a front loading type washing machine in details. This model is constructed for verifying the bearing model between the tub and drum, and for analyzing the suspension system composed by two springs and magnetorheological dampers between the case and basket. The obtained results help engineers to design washing machines efficiently.[[sponsorship]]National Taipei University of Technology[[conferencetype]]國際[[conferencedate]]20091127~20091129[[iscallforpapers]]Y[[conferencelocation]]Taipei, Taiwa

The capture region of a general 3D TPN guidance law for missile and target with limited maneuverability

[[abstract]]A method is used to analyze the capture area of general 3D true proportional navigation (TPN) guidance laws. With the aid of the orthogonal by not orthonormal modified polar coordinate (MPC), and three modified polar variables (MPVs), the expression of relative dynamics between target and missile becomes simple, and no trigonometric functions are involved, which makes possible the analysis of capture region for both target and missile with limited maneuverability. It can be shown that the determination of the desired capture area requires only the first two of the MPVs no matter whether the maneuverability of missile and target are limited or not. The boundary of the capture region on the two MPVs phase plane can be shown is composed of stable, unstable manifolds and a particular trajectory which will be indicated in the context. For the case of unlimited missile acceleration and measurable target acceleration, the capture region can be found analytically, while for the other cases, the capture region can be obtained graphically[[notice]]20130320格式已修正by陸桂英[[conferencetype]]國際[[conferencedate]]20010625~20010627[[iscallforpapers]]Y[[conferencelocation]]Arlington, US

Capture Region of a GIPN Guidance Law for Missile and Target with Bounded Maneuverability

[[abstract]]In this paper, a novel method is used to analyze the capture area of three-dimensional general ideal proportional navigation (GIPN) guidance laws. Using a line-of-sight (LOS) fixed natural coordinate and three modified polar variables (MPVs), the expression of relative dynamics between target and missile becomes simple, and no trigonometric functions are involved, which makes possible the analysis of the capture region when both target and missile are subject to bounded maneuverability. It can be shown that the determination of the desired capture area requires only the first two of the MPVs no matter if the maneuverability of missile and target are bounded or not. For the case of unbounded missile acceleration and known target acceleration, the capture region can be found analytically, while for the other cases, the capture region can be obtained graphically in a two-dimensional phase plane. The boundaries of these capture regions are characterized by the stable and unstable manifolds of related equilibrium points, which can only be determined numerically in general at this moment. The results of this work indicate that knowing the target acceleration and utilizing larger navigation coefficients increase the area of the capture region, which agrees with known results in literature.[[incitationindex]]SCI[[booktype]]紙本[[booktype]]電子

A Tutorial on Finite Element Analysis of Straight-Tube Coriolis Flowmeters

[[abstract]]It has been more than fifteen years since finite element method was implemented to the analysis of Coriolis flowmeter. While most of the literature provided only part of the procedures on constructing the matrix system equations which is to be solved for the natural frequencies and mode shapes. In this paper, we intend not only to provide a detail derivation on the governing equations via Hamilton's principle, but also to determine the weak form of equations of motion by virtue of Lagrange's equation, instead of going through a tedious variational or weighted residual method. The formulation is based on the assumptions that the pipe was represented as a Timoshenko beam possessing stiffness and mass while the fluid was idealized as incompressible and in viscid.[[notice]]20130320格式已修正by陸桂英[[conferencetype]]國內[[conferencedate]]20061215~20061216[[booktype]]紙本[[iscallforpapers]]Y[[conferencelocation]]臺北市, 臺

Dynamic Output Feedback Compensation for Systems with Independent Amplitude and Rate Saturations

[[abstract]]The positive real lemma provides the basis for constructing linear output feedback dynamic compensators for multi-input plants with independent amplitude saturations. Fixed-structure techniques are used to obtain full- and reduced-order feedback compensators along with a guaranteed domain of attraction. These results are then applied to the problem of rate saturation. By using a feedback-type model, rate saturation is modeled as an amplitude saturation. The closed-loop system with amplitude and rate saturation is then treated as a system with independent "amplitude" saturations.[[conferencetype]]國內[[conferencetkucampus]]淡水校園[[conferencedate]]19951217~19951217[[iscallforpapers]]Y[[conferencelocation]]臺北縣, 臺

The Building and Mode Shape Analysis of Flexible Rotor System by Using ADAMS

[[abstract]]This paper is major talking about critical speeds and modes ofrotor-bearing system. We use Galerkin's method to find the equation ofmotion. The computer is very advanced and fast now. If we producevirtual prototypes in computer, and do the analysis and optimum designin computer. It can reduce many time and money to compare withproducing physical prototype. In this paper, we do the simulation offlexible overhang rotor in mechanical system simulation softwareADAMS, and to compare the result with the numerical solution.[[conferencetype]]國內[[conferencedate]]20010906~20010906[[iscallforpapers]]Y[[conferencelocation]]苗栗, 臺

Frequency Responses of Wire Rope Isolators

[[abstract]]In this work, both first harmonic and multiharmonic method are implemented to estimate the steady state response of wire rope isolators which is subject to arbitrary periodic excitation. First harmonic method is simple to implement in the sense of computer coding. In addition, when both frequency- and amplitude-controlled algorithms are formulated and are alternatively implemented, we would be able to obtain complete frequency-response curves including unstable solutions. While to determine the super harmonic resonant frequencies in the steady state, we resort to the discrete Fourier series (multi-harmonic) method. Finally, Galerkin/Levenberg-Marquardt Method is utilized to solve for a related optimization problem for those Fourier coefficients. Several numerical examples were examined to demonstrate the usage of these two methods.[[sponsorship]]中華民國力學學會[[notice]]20130320格式已修正by陸桂英[[conferencetype]]國內[[conferencedate]]20061215~20061216[[booktype]]紙本[[iscallforpapers]]Y[[conferencelocation]]臺北市, 臺

An Investigation on Mathematical Models of Wire Rope Isolators

[[abstract]]Vibration isolation systems using helical wire rope isolators are known to be highly effective in controlling both shock and vibration and have been used in numerous space and military applications. For damping response, the force displacement relationship of a wire rope isolator is highly nonlinear and history-dependent. For satisfactory analysis of such behavior, it is important to be able to characterize and to model the phenomenon of hysteresis accurately. Both Tinker and Bouc-Wen models that had been proposed for response studies of wire rope isolators are examined in this paper. For helical type wire-rope isolator Bouc-Wen's model, compared with Tinker's model, predicts much more intimate behavior as observed in experiment datum.[[sponsorship]]中華民國力學學會[[conferencetype]]國內[[conferencedate]]20061215~20061216[[booktype]]紙本[[iscallforpapers]]Y[[conferencelocation]]臺北市, 臺