Results 261 to 270 of about 25,962,359 (295)

Complex Eigenvalue Analysis and Brake Squeal: Traps, Shortcomings and their Removal

SAE International Journal of Passenger Cars - Mechanical Systems, 2012
<div class="section abstract"><div class="htmlview paragraph">Among many NVH problems brake squeal continues to be a difficult topic for design engineers and scientists. Both the experimental and the simulation approaches so far have failed to provide robust and reliable guidelines for the design of squeal free brakes.
Gottfried Spelsberg-Korspeter, Peter Hagedorn   +1 more
openaire   +1 more source

Complex Eigenvalue Analysis for Reducing Low Frequency Brake Squeal

SAE Technical Paper Series, 2000
<div class="section abstract"><div class="htmlview paragraph">A front disc brake system is used as an example for an investigation of low frequency squeal. Many different modifications to this disc brake system have been proposed and this paper focuses on a solution that reduces the stiffness of the rotor.
Shih-Wei Kung, K. Brent Dunlap, Robert S. Ballinger   +2 more
openaire   +1 more source

Largest eigenvalue of complex wishart matrices and performance analysis of MIMO MRC systems

IEEE Journal on Selected Areas in Communications, 2003
This paper extends Khatri (1964, 1969) distribution of the largest eigenvalue of central complex Wishart matrices to the noncentral case. It then applies the resulting new statistical results to obtain closed-form expressions for the outage probability of multiple-input-multiple-output (MIMO) systems employing maximal ratio combining (known also as ...
Ming Kang 0001, Mohamed-Slim Alouini
openaire   +2 more sources

Complexity analysis of eigenvalue based spectrum sensing techniques in cognitive radio networks

2012 18th Asia-Pacific Conference on Communications (APCC), 2012
Energy based spectrum sensing detectors is optimal in terms of computational complexity but they have certain limitations of their dependence upon noise. In contrast eigenvalue based algorithms do not depend upon noise uncertainty. Eigenvalue based algorithms are computationally complex as compared to energy detection method.
Ammar Ikram, Adnan Rashdi
openaire   +1 more source

A Study on the Reduction of Disc Brake Squeal Using Complex Eigenvalue Analysis

SAE Technical Paper Series, 2001
<div class="htmlview paragraph">In this paper, we investigate a method to calculate the dynamic instability of a disc brake system and propose a criterion of design modification. To estimate dynamic instability, complex eigenvalue analysis is performed for a brake system and the contribution factor of each component to an unstable complex mode is
Choonki Park, Min Gyu Han, Sung Sun Cho, Hyoung Gil Choi, Ji Deok Jeong, Jang Moo Lee   +5 more
openaire   +1 more source

A prediction methodology of disk brake squeal using complex eigenvalue analysis

International Journal of Vehicle Design, 2008
This paper presents a methodology for predicting disk brake squeal using the Finite Element (FE) method whereby a three-dimensional FE model of a real disk brake is validated at the component and assembly levels, and more importantly through contact analysis.
Abd Rahim AbuBakar, Huajiang Ouyang
openaire   +1 more source

Rotating Disc Model for Complex Eigenvalue Analysis of Brake Squeal

2015
Modelling of disc rotor is a key step in building a disc brake model for squeal analysis. While braking, the disc is rotating and other components are fixed and there are sliding contact between the pads and the disc. In the most common used complex eigenvalue analysis method, the moving load nature was normally ignored.
Yujian Wang, Yongchang Du, Pu Gao
openaire   +1 more source

Analysis of squeaking on ceramic hip endoprosthesis using the complex eigenvalue method

Wear, 2011
Abstract A finite element model of the ceramic hip endoprosthesis system is established with ABAQUS 6.7. The generation mechanism of squeaking is studied using the complex eigenvalue method which allows for a stability analysis of the system under friction coupling.
N. Fan, G.X. Chen, L.M. Qian
openaire   +1 more source

Study on the design sensitivity analysis based on complex variable in eigenvalue problem

Finite Elements in Analysis and Design, 2009
In the sensitivity techniques, the adjoint variable method is quite popular because it reduces computation time and save computer resources. Commonly, the adjoint variable method employs exact analytical differentiation with respect to the design variables. But, it can be cumbersome to precisely differentiate every given type of finite element.
Hyungi Kim, Maenghyo Cho
openaire   +1 more source

Ordered Eigenvalues of Complex Noncentral Wishart Matrices and Performance Analysis of SVD MIMO Systems

2006 IEEE International Symposium on Information Theory, 2006
We derive new closed-form expressions for the marginal cumulative distribution function (c.d.f.) and marginal probability density function (p.d.f.) of the ordered eigenvalues of complex noncentral Wishart matrices. These results are used to analyze the performance of singular value decomposition (SVD) based MIMO systems in Ricean fading channels.
Shi Jin 0002, Xiqi Gao 0001, Matthew R. McKay   +2 more
openaire   +2 more sources