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Chinese control Conference (CCC)

作者： Shang-Bin Jiao Jie Kou Ding Liu Qing Zhang National & Local Joint Engineering Research Center of Crystal Growth Equipment and System Integration Xi'an University of Technology Xi'an Shaanxi CN Shaanxi Key Laboratory of Complex System Control and Intelligent Information Processing Xi'an China

In this paper the asymmetric bistable system excited by binary aperiodic signals is taken as a model and the average symbol error rate is regarded as an index to study stochastic resonance (SR) phenomenon. Firstly, the SR driven by binary signals under α stable noise is studied. Secondly, the interplay between the α stable noise parameters α, β, and the system parameters a, b, r on the resonant output effect is explored. The results show that weak binary signals detection can be realized by adjusting the system parameters a, b and r. The optimal values solved by these parameters can make the system produce the best SR effect. For a certain a or b, there is an optimal value under different α or β. For the parameter r, there is an optimal value under different α, and there are several optimal values under different β. Moreover, when α or β is given different values, the evolution laws in asymmetric bistable SR system excited by binary signals are same. The results lay a foundation for realizing the adaptive parameter adjustment in asymmetric bistable SR system with α stable noise.

关键词： Error analysis Signal detection Indexes Time-domain analysis Stochastic resonance Fluctuations Market research

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research on the weak signal detection method based on adaptive vibrational resonance

Research on the weak signal detection method based on adapti...

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Chinese control Conference (CCC)

作者： Shang-Bin Jiao Di Sun Ding Liu Wei Chao Huang National & Local Joint Engineering Research Center of Crystal Growth Equipment and System Integration Xi'an University of Technology Xi'an Shaanxi CN Shaanxi Key Laboratory of Complex System Control and Intelligent Information Processing Xi'an China

In this paper, the weak signal detection under α stable noise is investigated based on bistable vibrational resonance (VR) which is driven by a high frequency signal. On the one hand, the energy of the high frequency drive signal is transferred to the low frequency weak signal when VR occurs; on the other hand, the control of stochastic resonance (SR) is achieved based on VR, which transfers more noise energy into useful signal energy. In addition, considering the requirements of real-time detection, the amplitude and frequency of the high frequency drive signal are optimized by the knowledge-based particle swarm optimization (KPSO), which takes the mean signal-noise-ratio (MSNR) of output as the fitness function, and the property that VR system produces the best resonance effect just when the valid system parameter â(B,Ω) is greater than zero as knowledge. Finally, the parameter compensation is combined to achieve multi-high frequency weak signals detection with a stable noise. Furthermore, the method is applied to the vibration fault diagnosis of a mono-crystalline silicon furnace, and the experiment results show the effectiveness and practicability of the method.

关键词： Decision support systems

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Trajectory prediction and alerting for aircraft mode and energy state awareness

Trajectory prediction and alerting for aircraft mode and ene...

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AIAA Infotech @ Aerospace 2015

作者： Shish, Kimberlee Kaneshige, John Acosta, Diana Schuet, Stefan Lombaerts, Thomas Martin, Lynne Madavan, Avinash N. Intelligent Systems Division Millennium Engineering and Integration Company NASA Ames Research Center Mail Stop 269-1 Moffett FieldCA94035 United States Intelligent Systems Division NASA Ames Research Center Mail Stop 269-1 Moffett FieldCA94035 United States Institute of System Dynamics and Control German Aerospace Center DLR Münchner Straße 20 Weßling82234 Germany Human Systems Integration Division San Jose State University NASA Ames Research Center Mail Stop 262-4 Moffett FieldCA94035 United States Intelligent Systems Division Universities Space Research Association NASA Ames Research Center Mail Stop 269-1 Moffett FieldCA94035 United States

ISBN: (数字)9781624103384

ISBN: (纸本)9781624103384

This paper describes the implementation and evaluation of technologies that predict and assess the future aircraft energy state and autoflight configuration, and provide appropriate alerting to better inform pilots of the effect of problematic autoflight inputs or conditions. Prediction algorithms are used to extrapolate the current state of the aircraft based on flight management, autopilot and autothrottle system control laws and knowledge of mode transition logic. The resulting predicted trajectory represents the future four-dimensional flight path of the aircraft if the current course of action is continued. Probabilistic methods are used to estimate the trim envelope through high-fidelity model-based computation of attainable equilibrium sets. The corresponding maneuverability limitations of the aircraft are determined through a robust reachability analysis (relative to the trim envelope) through an optimal control formulation. The combination of prediction and assessment technologies are used to trigger timely alerts to avoid loss of control situations. The maneuvering envelope limits are also indicated on the primary flight display, and the predicted trajectory is displayed on navigation and vertical situation displays. The display features and alerts were evaluated in the Advanced Concepts Flight Simulator at NASA Ames research center, where commercial airline crews flew multiple problematic approach and landings scenarios to investigate the impact on current and future aircraft energy state awareness. Results show that the display features and alerts have the potential to improve situational awareness of what the automation is doing now and what it will do in the future. © 2015, American Institute of Aeronautics and Astronautics Inc. All rights received.

关键词： Forecasting

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The current tracing control for BSG motor field current based on sliding mode current observer

The current tracing control for BSG motor field current base...

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6th International Forum on Strategic Technology, IFOST 2011

作者： Yu, Tengwei Wang, Xudong Zhang, Bin Engineering Research Center of Automotive Electronics Driving Control and System Integration Ministry of Education Harbin University of Science and Technology Harbin China School of Electrical and Electronic Engineering Harbin University of Science and Technology Harbin China

ISBN: (纸本)9781457703966

On the basis of traditional electric excitation synchronous motor, BSG motors, adopting the mixed excitation technique, are widely used in mild-hybrid electric vehicle applications, but the nonlinearities of BSG motor excitation winding driving circuit and a variety of interference outside the engine compartment make it difficult for conventional PWM strategy to achieve the optimal output current. In this paper, a sliding mode observer approach is proposed, utilizing advantages that including good control robustness to conduct online setting. Simulation and experimental results show that the method enhances the system's self adaptive capacity, improves the startup performance of BSG-hybrid cars, and has good current tracking performance, and low costing. © 2011 IEEE.

关键词： Hybrid vehicles

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A Polarization Image Method for Lens decentration Measurement

A Polarization Image Method for Lens decentration Measuremen...

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IEEE Instrumentation & Measurement Technology Conference

作者： Kuo-Cheng Huang Chun-Li Chang Wen-Hong Wu System Control & Integration Division Instrument Technology Research center National Applied Research Laboratories

ISBN: (纸本)9781424428328;9781424428335

The tilt and decenter error of lens is usually induced by lens manufacturing process, injection molding or glass molding. The paper presents a polarization image method for measuring the tilt and decenter of lens. At first, to put the lens under test between two linear polarizers, and then a focused or divergent polarized beam will pass through a half-wave plate, once the lens has a shape error, the polarization image pattern and color will be change. Finally, the lens shape error can be computed by image processing.

关键词： Tilt Decenter Polarization image

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3D Face Recognition system

3D Face Recognition System

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IEEE Instrumentation & Measurement Technology Conference

作者： Chien-Liang Lin Chun-Jen Chen System Control & Integration Division Instrument Technology Research Center National Applied Research Laboratories

ISBN: (纸本)9781424428328;9781424428335

Recently, face recognition systems were broadly applied to electronic commerce, fingerprint identification, personal identification and access control system. Methods and theories of identification system are unceasingly improved. Most identification systems have strict restriction in the identification angle of human appearance face. In this study, multiple angles of identification in virtual human appearance face system are provided. The system needs only human appearance face in anterior view, and the appearance can be simulated automatically in different angles. The gray level of light source is utilized to overcome the problem of the single image deficiency of stereographic depth information. In addition, the general statistic methods that distinguish the shape of appearance face in three-dimension are also provided to reduce the percentage of error in image.

关键词： Face recognition Face detection 3D face

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The Development of a Low Cost Digital Spinneret Inspection system

The Development of a Low Cost Digital Spinneret Inspection S...

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IEEE Instrumentation & Measurement Technology Conference

作者： Chun-Jen Chen Wenyuh Jywe Min-Wei Hung Chien-Liang Lin Jeffery Hung Terry Lin System Control & Integration Division Instrument Technology Research Center National Applied Research Laboratories Advantage Scientific Inc.

ISBN: (纸本)9781424428328;9781424428335

A low cost digital and manual spinneret inspection system is established in this paper. This system consists of a 3-axes manual stage, a telcentric lens, a top light source, a bottom light source, a CCD camera and a notebook. In this system, the system software doesn't use the commercial or open source image processing product, such as LabView, Holcon and OpenCV, it was programmed by ourselves through the Microsoft Visual C# Express. In this system, the image processing time per frame is less 30 ms, it is enough for the manual optical inspection system. Because the frame rate of this system is higher than 30 fps and it is enough for the human eyes. In the inspection procedure, all inspection results will be recorded and can be reviewed from the system. The system can add any new type spinneret by user, and can show they in a list.

关键词： Optical inspection system Image processing Spinneret

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The development of a multifunction lens test instrument by using computer aided variable test patterns

The development of a multifunction lens test instrument by u...

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Applications of Digital Image Processing XXXII

作者： Chen, Chun-Jen Wu, Wen-Hong Huang, Kuo-Cheng National Applied Research Laboratories System Control and Integration Division Instrument Technology Research Center Hsinchu 300 Taiwan

ISBN: (纸本)9780819477330

A multi-function lens test instrument is report in this paper. This system can evaluate the image resolution, image quality, depth of field, image distortion and light intensity distribution of the tested lens by changing the tested patterns. This system consists of a tested lens, a CCD camera, a linear motorized stage, a system fixture, an observer LCD monitor, and a notebook for pattern providing. The LCD monitor displays a serious of specified tested patterns sent by the notebook. Then each displayed pattern goes through the tested lens and images in the CCD camera sensor. Consequently, the system can evaluate the performance of the tested lens by analyzing the image of CCD camera with special designed software. The major advantage of this system is that it can complete whole test quickly without interruption due to part replacement, because the tested patterns are statically displayed on monitor and controlled by the notebook. © 2009 SPIE.

关键词： CCD cameras

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Wake measurement downstream of a hybrid wing body model with blown flaps

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International Journal of Flow control 2010年第1期2卷 1-19页

作者： Lin, John Jones, Gregory Allan, Brian Westra, Bryan Collins, Scott Zeune, Cale NASA Langley Research Center Hampton VI 23681 United States Northrop Grumman Corporation El Segundo CA 90245 United States Air Force Research Laboratory Wright-Patterson AFB OH 45433 United States Flow Physics and Control Branch MS 170 United States Propulsion System Design and Integration MS 9V14/W6 United States Future Tactical Systems MS XE 40/W6 United States AFRL/RBAA United States

Flow-field measurements were obtained in the wake of a full-span Hybrid Wing Body model featuring steady blowing through internally blown flaps. The test was performed at the NASA Langley 14×22 Foot Subsonic Tunnel at low speeds. Off-body measurements were obtained with a 7-hole probe rake survey system. Three model configurations were investigated. At 0° angle of attack the surveys were completed with 0° and 60° flap deflections. At 10° angle of attack the wake surveys were completed with a slat and a 60° flap deflection. The 7-hole probe results further quantified two known swirling regions (downstream of the outboard flap edge and the inboard/outboard flap juncture) for the 60° flap cases with blowing at both angles of attack. Flow-field results and the general trends are very similar for the two blowing cases at nozzle pressure ratios of 1.37 and 1.56. High downwash velocities correlated with the enhanced lift for the 60° flap cases with blowing. Jet-induced effects are the largest at the most inboard station for all (three) velocity components due in part to the larger inboard slot height. The experimental data are being used for the validation of computational tools for high-lift wings with integrated powered-lift technologies.

关键词： Angle of attack

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Laser patterning with beam shaping on indium tin oxide thin films of glass/plastic substrate

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Thin Solid Films 2009年第4期518卷 1072-1078页

作者： Chen, Ming-Fei Hsiao, Wen-Tse Ho, Yu-Sen Tseng, Shih-Feng Chen, Yu-Pin Department of Mechatronics Engineering National Changhua University of Education Changhua 50058 Taiwan System Control and Integration Division Instrument Technology Research Center National Applied Research Laboratories Hsinchu 30076 Taiwan PCB Department Tongtai Machine and Tool CO. Kaohsiung 82151 Taiwan

In this research the laser beam shaper component has been used to obtain top-hat intensity distribution laser beam to perform line scribing and to perform electrode patterning on Indium thin oxide (ITO) thin films deposited on glass and plastic substrate. ITO films were removed with third harmonic Nd:YAG laser processing system. The pulse duration, laser output power, pulse repetition rate and scanning speed parameters of straight line patterning and electrode patterning on different types of substrates were discussed, respectively. The experimental results are measured by optical microscope and scanning electron microscope to evaluate the processing parameters and surface properties of ITO thin films. © 2009.

关键词： Indium compounds

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