Time filter

Source Type

Liu W.-H.,Harbin Engineering University | Li G.-F.,Jiangsu Automation Research Institute of CSIC
Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University

In order to better extract identifying features in the sound spectra of helicopter-radiated noise, a new feature extraction algorithm based on empirical mode decomposition (EMD) was proposed. Simulation results showed that the EMD algorithm can emphasize a signal's instantaneous characteristics and that the residual trend information was the mutative trend of the original signal. The proposed algorithm combined the characteristics of the EMD algorithm and spectrum composition of helicopter-radiated noise. Application of EMD to the signal analysis in transform domain (frequency domain) allowed effective extraction of the continuous spectrum. Using the smoothing filter method, when choosing the optimal α value the extracted continuous spectra are hysteretic to some extent. To overcome this disadvantage, the proposed algorithm can adaptively extract a signal's continuous spectrum, and the extracted continuous spectrum has no lag. In addition it can provide gain for a line spectrum, which can supply more useful information for subsequent target identification. Source

Qu W.,Jiangsu Automation Research Institute of CSIC
QR2MSE 2013 - Proceedings of 2013 International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering

For organizations, long-term success is tied directly to the development process of new product. Design for Six Sigma(DFSS) methodology can encourage organizations to adopt the best design practices for achieving competitive advantage and business excellence. In this paper, the performance of integrating DFSS in new product development process is presented and discussed, and the results show that this method is beneficial to improve product performance © 2013 IEEE. Source

Zhu N.,Shijiazhuang Mechanical Engineering College | Du X.,Shijiazhuang Mechanical Engineering College | Gu P.,Shijiazhuang Mechanical Engineering College | Qu W.,Jiangsu Automation Research Institute of CSIC
Proceedings of 2012 International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering, ICQR2MSE 2012

Interactive Electronic Technical Manual (IETM) is the latest form of technical data. Now, the manner and efficiency of IETM generation can not meet the requirements. In order to solve the above problem, and reduce the manual workload and possible error by human, the manner of IETM generation based on Logistics support analysis record for materiel (LSAR) was proposed. Data characteristics of LSAR and the content model of IETM based on S1000D was analyzed, and the manner of IETM generation based on LSAR was also verified. © 2012 IEEE. Source

Wei Q.,Jiangsu Automation Research Institute of CSIC | Ning Z.,Shijiazhuang Mechanical Engineering College
Proceedings of 2012 International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering, ICQR2MSE 2012

For the complicated digital bus device testing, there are two approaches: dedicated bus instrument and general-purpose digital IO instrument. The dedicated bus testers provide more advanced capability including exercising the bus, injecting errors, fully characterizing specification compliance for design validating and verification phase. This paper presents a modular solution based on the general-purpose digital IO instrument. By using built-in architectural elements such as the deep onboard memory, hardware handshaking, and an algorithmic engine, test engineers can increase the performance, modularity and simplification of test system. © 2012 IEEE. Source

Liu L.,Dalian Maritime University | Wang D.,Dalian Maritime University | Peng Z.-H.,Dalian Maritime University | Peng M.,Jiangsu Automation Research Institute of CSIC
Dalian Haishi Daxue Xuebao/Journal of Dalian Maritime University

Adaptive dynamic surface control was proposed for the uncertain DC-DC buck converter system with input constraint. The introduction of first-order filters allows the algorithm to be implemented without differentiating any model nonlinearities and suffering from the 'explosion' problem. By introducing an auxiliary control variable to ensure controller output within the specified range, an effective controller design method was developed. The proposed control law can guarantee the uniform ultimate boundness of all signals in the closed-loop system via Lyapunov synthesis, and make the tracking error converge to less neighborhood nearby origin. Numerical simulations are provided to illustrate the validity of the proposed control method. Source

Discover hidden collaborations