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- Simulation (3)
- Extended Kalman filter (2)
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- Added mass (1)
- Andronov-Hopf bifurcation (1)
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- Coarse sun sensor (1)
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- Convergent-divergent sinusoidal walls (1)
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- Correlated-Rician fading (1)
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Articles 1 - 30 of 30
Full-Text Articles in Controls and Control Theory
Design Of An Energy-Aware Enhanced Cooperative Mac Protocol In Mobile Ad Hoc Networks, Jaeshin Jang, Balasubramaniam Natarajan
Design Of An Energy-Aware Enhanced Cooperative Mac Protocol In Mobile Ad Hoc Networks, Jaeshin Jang, Balasubramaniam Natarajan
Journal of Marine Science and Technology
In this paper, we present a new energy-efficient cooperative MAC protocol, called the e2 BT-COMAC protocol for mobile ad hoc networks, and evaluate its performance. In the proposed MAC protocol, which is an enhanced version of our previous eBT-COMAC protocol, a cross-layer energy-aware strategy for cooperative communication is employed using mobile nodes. Considering a random waypoint mobility model for all mobile nodes, we compare the system throughput and network lifetime of the e2 BT-COMAC protocol with previously proposed cooperative MAC protocols. Using a new metric that is a weighted combination of normalized system throughput and lifetime, we determine optimal values …
Design Of A New Electromagnetic Valve With A Hybrid Pm/Em Actuator In Si Engines, Ly Vinh Dat, Yaojung Shiao
Design Of A New Electromagnetic Valve With A Hybrid Pm/Em Actuator In Si Engines, Ly Vinh Dat, Yaojung Shiao
Journal of Marine Science and Technology
Numerous devices have been developed for controlling valve timings in SI engines. Among them, the electromagnetic valve train (EMV) actuator can fully control valve timings to improve fuel consumption and emission. In addition, an EMV with a permanent-magnet and electromagnetic-coil (PM/EM) hybrid actuator has several advantages of control, energy consumption, and time response compared over conventional EMVs. This paper proposes a novel EMV with a PM/EM hybrid actuator that differs considerably from existing EMVs. Finite element analysis was used for analyzing the EMV design. The optimization was based on criteria that ensured the EMV to satisfy holding forces in closed …
Effective Orifice Area Of A Newly Developed Polyurethane Aortic Valve: Manufacturing And Evaluation, Wu-Chiao Shih, Ha-Hai Vu, Cheung-Hwa Hsu, Kai-Wen Yang, Yaw-Hong Kang
Effective Orifice Area Of A Newly Developed Polyurethane Aortic Valve: Manufacturing And Evaluation, Wu-Chiao Shih, Ha-Hai Vu, Cheung-Hwa Hsu, Kai-Wen Yang, Yaw-Hong Kang
Journal of Marine Science and Technology
An optimal design for a polyurethane (PU) aortic valve was developed in a previous study. The current study investigated an approach for manufacturing PU aortic valves, evaluating the effective orifice areas (EOAs) of the prototypes. Two manufacturing approaches, assembly and single-piece forming methods, were developed. In the assembly method, support frames and valve leaflets were manufactured separately and then glued together by using an adhesive substance. By contrast, in the single-piece forming method, two main components of the valve were fabricated simultaneously by using a molding technique. This study established an experimental loop that mimics natural circulation from the left …
Modeling And Control Of A Novel Ball Screw Mechanism, Wen-Hsiang Hsieh, Kai-Bi Chang
Modeling And Control Of A Novel Ball Screw Mechanism, Wen-Hsiang Hsieh, Kai-Bi Chang
Journal of Marine Science and Technology
This study proposes a systematic approach for the design and control of a novel ball screw transmission system. We investigated the structure of the system, performed kinematic analysis, and conducted dimensional synthesis by optimization. The mathematical model of the system was determined by system identification and a refined PID controller was designed. Computer simulation was conducted to verify the feasibility of the proposed design. A prototype machine and an experimental setup were built and tested. The experimental results show that the output with the controller agrees well with the required output. Therefore, the proposed design can produce the expected output …
Contour Data Acquisition System For Electric Vehicle Distance Estimation System, Kuew Wai Chew, Chee Ken Leong
Contour Data Acquisition System For Electric Vehicle Distance Estimation System, Kuew Wai Chew, Chee Ken Leong
Journal of Marine Science and Technology
The conventional distance estimation system only uses a constant speed and a constant level of road elevation to estimate the driving range of a vehicle. This technique leads to low prediction accuracy. In this project, a new estimation technique namely the Contour Positioning System (CPS) for an electric vehicle is proposed. The CPS provides a more reliable estimation of the electric vehicle battery energy usage by taking into consideration additional factors such as road elevation and regenerative braking energy. In order to perform the CPS calculation, first and foremost, the elevation profile of the selected destination must be determined. In …
Applying Fuzzy Logic Controller To Intelligent Solar Panel Cleaning System, Cong-Hui Huang
Applying Fuzzy Logic Controller To Intelligent Solar Panel Cleaning System, Cong-Hui Huang
Journal of Marine Science and Technology
This paper presents an intelligent solar panel cleaning system that utilizes a fuzzy logic controller. The output voltage of the solar panel is applied to calculate whether to activate the cleaning mechanism. The direction and position of the system is set using a light sensor that is parallel to the direction of the sunlight. The data from the light sensors, combined with fuzzy logic control software developed using LabVIEW, determine the control commands (stop, forward, and reverse) for the stepper motors controlling the cleaning process. The cleaning process, which is repeated until the power output from the solar panels is …
Discoid And Asymmetrical Gyroless Micro-Satellite Off-Modulation Attitude Control With Kalman Filter, Ho-Nien Shou
Discoid And Asymmetrical Gyroless Micro-Satellite Off-Modulation Attitude Control With Kalman Filter, Ho-Nien Shou
Journal of Marine Science and Technology
The gyroless attitude control method and kalman algorithm procedures presented in this paper are applicable to asymmetrical microsatellites of any shape with large mass variation and without angular rate sensors. The attitude sensors include a three-axis magnetometer, a horizon sensor, and a coarse sun sensor (CSS), which together serve as an analytic platform and help in ensuring the stability of attitude controls. The attitude control problem of microsatellites has become a focal point because microsatellite fabrication processes are short, costless, and can be flexibly used for various purposes. The center of mass of the microsatellite can be offset because of …
Periodic Damage Evaluation Of Aging Offshore Jackets Based On Continuous Dynamic Tests, Fu-Shun Liu, Hong-Chao Lu, Wei-Ying Wang, Dong-Ping Yang
Periodic Damage Evaluation Of Aging Offshore Jackets Based On Continuous Dynamic Tests, Fu-Shun Liu, Hong-Chao Lu, Wei-Ying Wang, Dong-Ping Yang
Journal of Marine Science and Technology
This study proposes a new method for evaluating the damage of aging offshore platforms, based on dynamic tests. The proposed method involves a new damage indicator for reducing the effects of occurred damages accumulated before the first measurement. One theoretical improvement is that the requirement of using the stiffness matrix of the finite element model to replace that of the measured model can be ignored in calculating the modal strain energy of the measured model. The other development is that the proposed approach can be used for providing reasonable evaluations of damages that occurred between two adjacent dynamic tests. This …
Fault Diagnosis And Performance Assessment For A Rotary Actuator Based On Neural Network Observer, Jian Ma, Xin Li, Chen Lu, Zi-Li Wang
Fault Diagnosis And Performance Assessment For A Rotary Actuator Based On Neural Network Observer, Jian Ma, Xin Li, Chen Lu, Zi-Li Wang
Journal of Marine Science and Technology
Substantial damage may occur when a rotary actuator fails during operation. Therefore, effective fault diagnosis of a rotary actuator is crucial to ensuring the safety of the device. However, only a few studies on fault detection, fault isolation, and performance assessment have focused on rotary actuators. In this study, fault detection and fault isolation processes were implemented by designing two observers based on a neural network, and a method that assesses the performance of the rotary actuator is proposed. First, two observers are established according to the structure of the rotary actuator. Data in their normal state are used to …
Preface, Wen-Hsiang Hsieh
Preface, Wen-Hsiang Hsieh
Journal of Marine Science and Technology
No abstract provided.
Research On Sealing Performance Of Hydrostatic Pressure Mechanical Seal, Wei-Bing Zhu, He-Shun Wang, Sheng-Ren Zhou
Research On Sealing Performance Of Hydrostatic Pressure Mechanical Seal, Wei-Bing Zhu, He-Shun Wang, Sheng-Ren Zhou
Journal of Marine Science and Technology
The hydrostatic pressure mechanical seal has many advantages, and it can be used in rotating machines with lower speed. Based on the externally pressurized stable gas lubrication theory, the control equation of end face flow field for hydrostatic pressure mechanical seal with orifice compensation was established. The functional extremum algorithm and the finite element method were used to solve this equation. The effects of gas film thickness, air supply pressure, throttle orifice number and diameter, on face opening force and gas film stiffness were discussed in detail. The results show that the opening force decreases with the widening of face …
Performance Evaluation Of Three Types Of Passive Micromixer With Convergent-Divergent Sinusoidal Walls, Arshad Afzal, Kwang-Yong Kim
Performance Evaluation Of Three Types Of Passive Micromixer With Convergent-Divergent Sinusoidal Walls, Arshad Afzal, Kwang-Yong Kim
Journal of Marine Science and Technology
A passive split-and-recombination micromixer with convergent-divergent channel walls of sinusoidal variation has been investigated using numerical simulations. With water and ethanol as working fluids, the analysis was performed using Navier-Stokes equations with convection-diffusion model in a Reynolds number range, 10 Re 70. Performances of three configurations with different split-and-recombination arrangements were evaluated in terms of mixing index and pressure drop. A parametric study was also conducted with two geometrical parameters, i.e., the ratios of throat-width to diameter of circular wall and diameter of circular wall to amplitude. The results showed a significant dependence of the mixing performance on …
Synthetic Physical Models For Animating Unsteady Fish Motions, Shyh-Kuang Ueng, Hong-Kai Chen
Synthetic Physical Models For Animating Unsteady Fish Motions, Shyh-Kuang Ueng, Hong-Kai Chen
Journal of Marine Science and Technology
This paper presents physical models for simulating unsteady fish motions, including bursting, gliding, braking, turning, ascending and descending. A new wave model, the controllable body wave model, is developed to undulate the fish body to produce bursting and gliding motions. A key frame approach is adopted to realize braking, turning, descending and ascending. In the key frame method, individual motions are decomposed into sequences of key steps. The gestures of the fish in these key steps are recorded and regarded as key frames. In the run time, these recorded key frames are sequentially reproduced to generate swimming patterns. In addition …
Development Of An Intelligent Energy Saving Heat Pump For Water Heater With Fuzzy Logic Controller, Cong-Hui Huang
Development Of An Intelligent Energy Saving Heat Pump For Water Heater With Fuzzy Logic Controller, Cong-Hui Huang
Journal of Marine Science and Technology
There is a growing awareness of the importance of using clean and environmentally friendly sources of energy. This paper presents the development of an intelligent energy saving heat pump for a water heater with a fuzzy logic controller that analyzes the heating efficiency of the heat pump heater. The fuzzy logic controller is employed for developing a heating algorithm to raise the efficiency of the heat pump heater and suppress unnecessary heating at high temperatures. Experimental results show that our heat pump heater produces an energy saving of 60% of total energy input, compared to the 23% for a gas …
A Study On Optimization Of Ship Hull Form Based On Neuro-Response Surface Method (Nrsm), Soon-Sub Lee, Jae-Chul Lee, Sung-Chul Shin, Soo-Young Kim, Hyun-Sik Yoon
A Study On Optimization Of Ship Hull Form Based On Neuro-Response Surface Method (Nrsm), Soon-Sub Lee, Jae-Chul Lee, Sung-Chul Shin, Soo-Young Kim, Hyun-Sik Yoon
Journal of Marine Science and Technology
Building large and eco-friendly ships has become a clear trend in the ship building industry. Research to minimize ship resistance has actively been investigated for energy savings and environmental protection. However, optimization of the full geometry, while taking into account the hydrodynamic performance is difficult because extensive time is needed to calculate the performance factors, such as the resistance and propulsion. Hence we suggest an optimal design framework based on the neuro-response surface method (NRSM) for optimal shape design in consideration of hydrodynamic performance. The optimization algorithm of the constructed framework consists of the back-propagation neural network (BPN) and the …
Added Mass Computation For Control Of An Open-Frame Remotely-Operated Vehicle: Application Using Wamit And Matlab, You-Hong Eng, Cheng-Siong Chin, Michael Wai-Shing Lau
Added Mass Computation For Control Of An Open-Frame Remotely-Operated Vehicle: Application Using Wamit And Matlab, You-Hong Eng, Cheng-Siong Chin, Michael Wai-Shing Lau
Journal of Marine Science and Technology
In this paper, numerical modeling and testing of a complexshaped remotely-operated vehicle (ROV) are shown. The paper emphasizes on systematic modeling of hydrodynamic added mass using computational fluid dynamic software WAMITTM on the open frame ROV that is not commonly applied in practice. From initial design and prototype testing, a small-scale test using a free-decaying experiment is used to verify the theoretical models obtained from WAMITTM. Simulation results have shown to coincide with the experimental tests. The proposed method is able to determine the hydrodynamic added mass coefficients of the open frame ROV.
Application Of Adaptive Variable Speed Back-Stepping Sliding Mode Controller For Pmlsm Position Control, Mei-Yung Chen, Jian-Shiun Lu
Application Of Adaptive Variable Speed Back-Stepping Sliding Mode Controller For Pmlsm Position Control, Mei-Yung Chen, Jian-Shiun Lu
Journal of Marine Science and Technology
In this research, an adaptive variable speed back-stepping sliding mode controller (AVSBSMC) is proposed to control the permanent magnet linear synchronous motor (PMLSM) on high-precision positioning servo system platform. This controller combines the dynamic features of variable speed control (VSC) and the positioning characteristics of adaptive back-stepping sliding mode control (ABSMC). Firstly, the detailed dynamic machine model of PMLSM is established. Secondly, the proportional-integral-derivative (PID) and ABSMC controllers are proposed to compensate the uncertainties in position control. Then, the one provides the better servo performances is the position controller in the motor system. Thirdly, the variable speed controller (VSC) and …
Mimo Transmission In Spatially Correlated Fading, Joy Iong-Zon Chen, Chi-Tsung Huang, Yu-Hsing Chien
Mimo Transmission In Spatially Correlated Fading, Joy Iong-Zon Chen, Chi-Tsung Huang, Yu-Hsing Chien
Journal of Marine Science and Technology
A multiple-input, multiple-output (MIMO) system transmission over a channel characterized by spatially correlated fading is addressed in this article. Two scenarios that involved using well-known statistical fading distributions, correlatedRician and correlated-Nakagami-m fading, were deployed in analysis. The moment-generating function obtained using a stochastic process was applied to determine the ergodic, or average, channel capacity, thus by passing the difficulty traditionally associated with calculating the probability density function of the signal-to-noise ratio. The results of several numerical and Monte-Carlo comparisons are offered for validating the accuracy of the theoretically derived formulae. Furthermore, many plots were designed by combining different numbers of …
Global Localization Using Dead-Reckoning And Kinect Sensors For Robots With Omnidirectional Mecanum Wheels, Ching-Chih Tsai, Feng-Chun Tai, Yu-Cheng Wang
Global Localization Using Dead-Reckoning And Kinect Sensors For Robots With Omnidirectional Mecanum Wheels, Ching-Chih Tsai, Feng-Chun Tai, Yu-Cheng Wang
Journal of Marine Science and Technology
This paper presents a low-cost global pose localization method using least-squares method and extended Kalman filter (EKF) for an anthropomorphous dual-arm mobile robot (ADAMR) driven by omnidirectional Mecanum wheels in indoor environments. This method is developed by fusing measurements from the KINECT sensor and four encoders mounted on the omnidirectional Mecanum wheels. The KINECT sensor is used to recognize landmarks in the working environments of the robot, and then obtain the azimuth angles and distances between these landmarks and the robot. Based on these measured information, a static global pose initialization algorithm using least-squares method is applied to estimate both …
A Wheeled Mobile Robot Path-Tracking System Based On Image Processing And Adaptive Cmac, Jih-Gau Juang, Ko-Jui Hsu, Chih-Min Lin
A Wheeled Mobile Robot Path-Tracking System Based On Image Processing And Adaptive Cmac, Jih-Gau Juang, Ko-Jui Hsu, Chih-Min Lin
Journal of Marine Science and Technology
This study entailed applying image-processing techniques and an intelligent control method to a wheeled mobile robot (WMR) for real-time trajectory recognition and tracking. The WMR was fitted with a charge-coupled device (CCD) camera to capture images of the environment, and the hue-saturationintensity color space was used to classify the color features of the captured images. The WMR calculates the relative position of a target object by using image-processing and edgedetection algorithms. This paper proposes a cerebellar model articulation controller (CMAC) and adaptive CMAC to replace conventional proportional-integral-derivative (PID) controller for guiding the WMR to track a desired path. Moreover, using …
The Development Of A Cost-Effective And Optimized Dp-Spiv System For Fluid Turbulence Researches, Yu-Chi Chang, Yi-Hung Chang, Yaw-Huei Lee, Yi-Chih Chow
The Development Of A Cost-Effective And Optimized Dp-Spiv System For Fluid Turbulence Researches, Yu-Chi Chang, Yi-Hung Chang, Yaw-Huei Lee, Yi-Chih Chow
Journal of Marine Science and Technology
Turbulent flows and issues of turbulence modeling have long been intriguing and important in fluid researches and practices. The mean or instantaneous velocity gradient tensors with six independent components, or other tensorial variables involving gradients, play a key role in turbulence dynamics and models. The advancement of the knowledge of these parameters relies on measurement systems built on sophisticated flow diagnostic techniques that enable both detailed and complete measurements. However, such systems seem inevitably complicated to operate and costly to build and maintain. Therefore, we develop and optimize a dual-plane stereoscopic particle image velocimetry (DP-SPIV) system that is much more …
Wavelet Support Vector Machine For Face Recognition, Chen-Chia Chuang, Ping-Lun Liao, Jin-Tsong Jeng
Wavelet Support Vector Machine For Face Recognition, Chen-Chia Chuang, Ping-Lun Liao, Jin-Tsong Jeng
Journal of Marine Science and Technology
In this paper a tool system with wavelet support vector machine (WSVM) under dimension reduction for face recognition is proposed. Eigenfaces and fisherfaces are the major methods used to reduce the dimension of face images in the proposed face recognition tool system. At the same time, noise interference image cases, namely Gaussian noise, with no ears and no eyes are also considered in this paper. Finally, the implementation of proposed system is based on objectoriented design software; the dimension reduction and wavelet kernel support vector machine are applied to the proposed tool system that can deal with face recognition problems …
Design Of A Chart-Based Radar Simulator Augmented With A Multi-Agent Ship Traffic Simulation Platform, Shwu-Jing Chang, Yu-Ting Lai, Chun-Mai Hsu
Design Of A Chart-Based Radar Simulator Augmented With A Multi-Agent Ship Traffic Simulation Platform, Shwu-Jing Chang, Yu-Ting Lai, Chun-Mai Hsu
Journal of Marine Science and Technology
This paper presents a radar simulation system developed under a request to deliver a radar and an Electronic Chart Display and Information System (ECDIS) for the navigation bridge of a ship maneuvering simulator. It is designed to dynamically generate radar image based on the electronic navigational chart database and sensor information to provide flexibility in navigation area for exercise and maintain consistency with other sensors or systems of the bridge, especially the ECDIS. Since the successful delivery of our study, the radar simulation system has been augmented with a Multi-Agent Ship Traffic (MAST) simulation platform and evolved into a versatile …
A Particle Swarm Optimization-Like Algorithm For Constrained Minimal Spanning Tree Problems, Chun-Chao Yeh, Ying-Che Chien
A Particle Swarm Optimization-Like Algorithm For Constrained Minimal Spanning Tree Problems, Chun-Chao Yeh, Ying-Che Chien
Journal of Marine Science and Technology
Previous studies have discussed various constrained minimal spanning tree (MST) problems. In this paper, we propose an efficient algorithm for solving a class of constrained MST problems. The proposed PSO (Particle Swarm Optimization)- like strategy for solving constrained MST problems identifies optimal MSTs under degree and delay constraints. The solution quality and computation time of the proposed PLCMST (PSO-Like algorithm for Constrained MST problems) algorithm is compared with two other algorithms: one based on ant colony optimization, and the other based on a genetic algorithm strategy. Our experimental results show that the PLCMST outperforms the other two approaches, particularly when …
Linear State Feedback Design For Surge Control Of Axial Flow Compressor Dynamics, Der-Cherng Liaw, Yun-Hua Huang, Wen-Ching Chung
Linear State Feedback Design For Surge Control Of Axial Flow Compressor Dynamics, Der-Cherng Liaw, Yun-Hua Huang, Wen-Ching Chung
Journal of Marine Science and Technology
Based on Moore and Greitzer’s model [15], the surge behavior of axial flow compression system was found to be attributed to the appearance of Andronov-Hopf bifurcationin [12]. In this paper, we focus on the design of control law to prevent and/or delay the occurrence of the bifurcations, which will then suppress the surge behavior. Both types of linear dynamic state feedback and linear washout filter controllers are proposed. The proposed washout design does not require the explicit knowledge of the operating point and keep the original equilibrium characteristic while the dynamic feedback design will change the equilibrium operating points for …
Dynamic Output Feedback Sliding Mode Controller Design For Chattering Avoidance, Jeang-Lin Chang, Jui-Che Tsai
Dynamic Output Feedback Sliding Mode Controller Design For Chattering Avoidance, Jeang-Lin Chang, Jui-Che Tsai
Journal of Marine Science and Technology
For a class of linear MIMO uncertain systems, a dynamic output feedback sliding mode control algorithm that avoids the chattering problem and high gain control is proposed in this paper. Without using any differentiator, we develop a modified asymptotically stable second order sliding mode control law in which the developed controller can guarantee the finite time convergence to the sliding mode and the system states asymptotically approach to zero. Finally, a numerical example is explained for demonstrating the applicability of the proposed scheme.
Active Appearance Model Algorithm With K-Nearest Neighbor Classifier For Face Pose Estimation, Bing-Fei Wu, Chih-Chung Kao, Cheng-Lung Jen, Chia-Rong Chiang, Po-Hung Lai
Active Appearance Model Algorithm With K-Nearest Neighbor Classifier For Face Pose Estimation, Bing-Fei Wu, Chih-Chung Kao, Cheng-Lung Jen, Chia-Rong Chiang, Po-Hung Lai
Journal of Marine Science and Technology
In this paper, a face pose estimation (FPE) algorithm using active appearance model (AAM) with a k-nearest neighbor (kNN) classifier is presented. AAM is a model-based image representation method used to describe non-rigid visual objects, with both shape and texture variations, using a mean vector and linear combinations of a set of variation modes. Since AAM is a deformable model, it has several variations. Owing to the variations, the model is adjusted to the input test face image using iterative searching and fitting. The error, which measures the difference between the model and a test image, is minimized with the …
Numerical Modeling Of Wave-Induced Rotations Of A Bottom-Hinged Flapper With A Sph Model, Da-Wei Chen, Shiaw-Yih Tzang, Chih-Min Hsieh, Yi-Chih Chow, Jiahn-Horng Chen, Chen-Chou Lin, Robert Rong-Jiann Hwang
Numerical Modeling Of Wave-Induced Rotations Of A Bottom-Hinged Flapper With A Sph Model, Da-Wei Chen, Shiaw-Yih Tzang, Chih-Min Hsieh, Yi-Chih Chow, Jiahn-Horng Chen, Chen-Chou Lin, Robert Rong-Jiann Hwang
Journal of Marine Science and Technology
In this study, a Smoothed Particle Hydrodynamics model for simulating wave-induced rotations of a bottom-hinged flapper was established in a 2-D numerical wave flume. The simulated rotating angles illustrated that the flapper could swing back and forth following harmonic wave loadings. The simulations were also seen to be in good agreement with experimental data, confirming the applicability of the present numerical model. The simulated hydrodynamic behaviors at different phases showed that the flapper moved downstream under the wave crest and upstream under the wave trough following the elliptical form of water particle trajectory. The energy conversions of a flapper during …
Development Of A Strapdown Inertial Navigation System Simulation Platform, Dah-Jing Jwo, Jyun-Han Shih, Chia-Sheng Hsu, Kai-Lun Yu
Development Of A Strapdown Inertial Navigation System Simulation Platform, Dah-Jing Jwo, Jyun-Han Shih, Chia-Sheng Hsu, Kai-Lun Yu
Journal of Marine Science and Technology
This paper presents a strapdown inertial navigation system (SINS) simulation platform. The numerical simulator solves the navigation equations in navigation frame where the quaternion vector is employed for attitude calculation. The measured quantities (angular body rates and specific force) are generated by the numerical simulator. The results are also confirmed with the navigation solutions given by a commercial inertial navigation system toolbox using the generated body angular rates and specific force of the SINS. The paper can provide the readers with further information for developing their own SINS simulation tools.
Effects Of Surface Roughness And Flow Rheology On The Ehl Of Circular Contacts With Power-Law Fluid, Li-Ming Chu, Jaw-Ren Lin, Hsiang-Chen Hsu, Yuh-Ping Chang
Effects Of Surface Roughness And Flow Rheology On The Ehl Of Circular Contacts With Power-Law Fluid, Li-Ming Chu, Jaw-Ren Lin, Hsiang-Chen Hsu, Yuh-Ping Chang
Journal of Marine Science and Technology
The coupled effects of surface roughness and flow rheology on the Elastohydrodynamic lubrication (EHL) circular contact problems are analyzed and discussed. The average flow model is adapted for the interaction of the flow rheology of lubricant and surface roughness. The averaged Reynolds type equation, the rheology equations, the elastic deformation equation, and the force balance equation are solved simultaneously. The multilevel multi-integration (MLMI) algorithm and Gauss-Seidel iteration method are utilized to calculate the film thickness and pressure distributions. The effects of flow index, Peklenik number, and standard deviation of composite surface roughness on the film thickness and pressure distributions are …