Thematische Bibliographien / Steering Ratio

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Auswahl der wissenschaftlichen Literatur zum Thema „Steering Ratio“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 1. Februar 2022

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Zeitschriftenartikel zum Thema "Steering Ratio"

Xu, Huang, Yan Dong Song, Zhi Xiong Lu und Miao Miao Zhao. „Transmission Ratio Research of Hydraulic Steering by-Wire System“. Advanced Materials Research 774-776 (September 2013): 455–59. http://dx.doi.org/10.4028/www.scientific.net/amr.774-776.455.

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To test the hydraulic steering by-wire system whether can achieve the ideal steering characteristics, firstly take experimental tests of the full hydraulic steering system, getting the transmission ratio curve. Then the simulation for the hydraulic steering by-wire system by MATLAB showed that simulation results combined with the test curve, the hydraulic steering by-wire system satisfy the requirement of vehicle working.

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Niu, Zi Ru, Gang Yan Li, Shun Zeng, Tian Li Yan, Si Yu Zhang und Wei Wang. „Research on the Variable Ratio Gear Modeling and Transmission Ratio Test Method of Rack and Pinion Variable Ratio Steering Gear“. Applied Mechanics and Materials 721 (Dezember 2014): 157–61. http://dx.doi.org/10.4028/www.scientific.net/amm.721.157.

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A new modeling method for the variable ratio gear of the rack and pinion variable ratio steering gear was proposed in this paper. It was based on the characteristic that variable ratio gear pair meshing tooth profile surface are the envelope surface of each other and established a variable ratio gear three-dimensional model by simulating the gear machining process in CATIA and using Boolean subtraction operation. According to the related test standard of the variable ratio steering gear transmission ratio, a test bench was design and build, and the correctness of this modeling method was verified by comparing the designed variable ratio curve and the steering gear sample designed and processed by this method.

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Wu, Xiaodong, und Wenqi Li. „Variable steering ratio control of steer-by-wire vehicle to improve handling performance“. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 234, Nr. 2-3 (08.05.2019): 774–82. http://dx.doi.org/10.1177/0954407019848174.

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To improve vehicle handling performance, a variable steering ratio characteristic for steer-by-wire system is designed. The steering ratio is adjusted by a compensating coefficient according to vehicle longitudinal speed and steering wheel angle. To evaluate the performance of vehicle with variable steering ratio, simulations are conducted based on an objective evaluation index, which consists of quadratic cost functions of vehicle lateral deviation, steering angular speed, vehicle lateral acceleration and roll angle. By using the optimized data from the simulation results, a Takagi-Sugeno fuzzy neural network is designed for the steering ratio control. In order to test and validate the proposed controller, a series of comparison experiments are conducted on a closed-loop driver-vehicle system, including lemniscate curve test and double lane-change test. The results demonstrate that compared with a conventional steering system with fixed steering ratio, the proposed system can not only improve steering agility at low speed and steering stability at high speed, but also reduce driver’s workload in critical driving conditions.

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SHIMIZU, Yasuo. „Development of VGS(Variable Gear-ratio Steering : "With the aim of ideal steering"“. Proceedings of the Transportation and Logistics Conference 2001.10 (2001): 9–14. http://dx.doi.org/10.1299/jsmetld.2001.10.9.

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Huang, Junjie, und Benxian Xiao. „Variable steering ratio design and handling stability research for steer-by-wire forklift“. Advances in Mechanical Engineering 11, Nr. 3 (März 2019): 168781401882289. http://dx.doi.org/10.1177/1687814018822898.

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For the TFC35 steer-by-wire forklift, a linear 3-degree-of-freedom forklift model is given, which provides a verification model for variable steering ratio design. The concept of ideal steering ratio is expounded. The variable steering ratio algorithm based on constant yaw rate gain and the variable steering ratio algorithm based on constant lateral acceleration gain are studied. A variable steering ratio algorithm based on two kinds of gain combination is proposed. The advantages and disadvantages of the above three static variable steering ratio algorithms based on constant gain are simulated and analyzed. Aiming at complex working conditions, a dynamic variable steering ratio control scheme based on fuzzy neural network is proposed. The definition, implementation steps, and adjustment algorithms of each layer of fuzzy neural network are given. The final experiment results show that the dynamic variable steering ratio method based on fuzzy neural network is more resistant to the disturbance of its own parameters and can be used in complex dynamic conditions, which helps to improve the handling stability of the forklift.

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Niu, Zi Ru, Gang Yan Li, Jian Hu, Tian Li Yan, Si Yu Zhang und Jiang Jiang Tan. „Research on Structural Optimization Method of Rack and Pinion Steering Gear with Variable Ratio“. Applied Mechanics and Materials 664 (Oktober 2014): 98–103. http://dx.doi.org/10.4028/www.scientific.net/amm.664.98.

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Compared to the rack and pinion steering gear with constant ratio,the variable ratio rack and pinion of rack and pinion steering gear with variable ratio will cause changes in the force environment of the steering. It is necessary to analyze its structure and find the structural optimization method of the rack and pinion steering gear with variable ratio. The overall model of rack and pinion steering gear with variable ratio was established by using CATIA, and the stress-strain and the deformation analysis of the overall structure was carried out by using ANSYS Workbench. The analysis results provide an important reference basis for the structural optimization method of rack and pinion steering gear with variable ratio.

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Xiang, Dan, Yong Bin Chi, Kai Qi Huang und Wei Xu. „Research on New Varying Gear Ratio System“. Advanced Materials Research 295-297 (Juli 2011): 800–803. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.800.

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A new automotive varying gear ratio system(VGRS)is introduced in this paper. Based on the analysis of foreign advanced theory in this field, a relationship among road wheel angle, steering wheel angle and vehicle speed is derived in order to achieve the optimum steering control for cornering and emergency maneuvers, whilst retaining the high-speed stability.

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Fahami, Sheikh Muhammad Hafiz, Hairi Zamzuri, Saiful Amri Mazlan und Sarah Atifah Saruchi. „The Variable Steering Ratio for Vehicle Steer by Wire System Using Hyperbolic Tangent Method“. Applied Mechanics and Materials 575 (Juni 2014): 781–84. http://dx.doi.org/10.4028/www.scientific.net/amm.575.781.

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In conventional steering system, during the parking maneuver, driver required large turned on the steering wheel to move the fornt tyre. Thus, it will increase the driver burden when turned the steering wheel. The feature of variable steering ratio (VSR), help to reduce driver burden. Moreover, it improves the vehicle maneuver at lower and high speed. This paper, proposed a control algorithm of variable steering ratio (VSR) in vehicle SBW system. The concept of hyperbolic tangent is used where it not only improved the maneuverability at lower speed, but also reduces the driver burden on the steering wheel. To investigate the effectiveness of the proposed VSR algorithm, the result is compared with conventional steering system

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NOMURA, Sachiyo, Hidehisa YOSHIDA und Masao NAGAI. „3207 Analysis of Driver's Steering Behavior by Changing the Relation between Steering Gear Ratio and Steering Torque“. Proceedings of the Transportation and Logistics Conference 2006.15 (2006): 199–202. http://dx.doi.org/10.1299/jsmetld.2006.15.199.

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Alexandru, Petre, Dragoş Macaveiu und Cătălin Alexandru. „Design and simulation of a steering gearbox with variable transmission ratio“. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 226, Nr. 10 (06.01.2012): 2538–48. http://dx.doi.org/10.1177/0954406211433984.

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This article presents the geometric and functional characteristics of a steering gearbox with variable transmission ratio, which contains a translating wheel (circular curved rack) in gearing with an eccentric sector (segment). The solution requires no special technology because it uses conventional involute gears, being obtained/derived from a classic gearbox with constant ratio by changing the gearing characteristics. The precision of the steering system and the reversibility of the gearing are not affected by these modifications, the driver having a good/safe control of the vehicle. This gearbox can be used for the steering systems of some low-power vehicles, assuring an increased actuating torque (less effort); in this way, the assistance (hydraulic power steering or electric power steering) can be avoided. The study is focused on the following objectives: formulating the theoretical bases, establishing the geometrical parameters, and simulating the functionality of the gearbox, based on the specific requirements of the vehicles’ steering system. Important conclusions have been drawn on the influence of some specific parameters in terms of insuring good gearing conditions, such as the variation of the distances between axes and the variation of the clearance between teeth.

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Mehr Quellen

Dissertationen zum Thema "Steering Ratio"

Hrudík, Jan. „Přední náprava vysokovýkonného sportovního vozu“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-443475.

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Tato diplomová práce byla psána při studentské zahraniční stáži, pod záštitou Evropské Unie – program „ERASMUS Student Mobility for Placement“. Stáž byla absolvována mezi prosincem 2010 a květnem 2011 ve společnosti a.d.Tramontana, mající sídlo v Palau de Santa Eulália, Španělsko. Pro kompletní návrh podvozku a odpružení jakéhokoli vozidla je nezbytná znalost mnoha technických disciplín. Tato diplomová práce se zabývá dvěma z nich – odpružení a řízení. Nejprve je rozebrána teorie, na kterou se může navázat v praktické části práce. Velká pozornost byla věnována srozumitelnosti textu a názornosti obrázků, bez zbytečných detailů, avšak bez vynechání důležitého. Tuto práci je tedy možné užít jako prvního kroku před návrhem podvozku. V další části je popsáno, jak byla probraná teorie využita při návrhu řízení u skutečného vozu, přičemž největší pozornost je věnována Ackermannově teorii řízení a geometrii zabraňující samořízení při propružení. V závěrečných částech je pozornost věnována ukázce některých z každodenních činností v malosériové výrobě automobilů – jde o zjištění maximálně možného pohybu kola při propružení a proces výroby příčných trojúhelníkových ramen včetně návrhu jejich připevnění k šasi.

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Mousa, Pasandi Mohammad Ebrahim. „Implementation of Radio-Over-Fiber OFDM System Including a Novel Optical Null-Steering Beamformer“. Thesis, Université Laval, 2008. http://www.theses.ulaval.ca/2008/25825/25825.pdf.

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Sayyah, Jahromi Mohammad Reza Information Technology &amp Electrical Engineering Australian Defence Force Academy UNSW. „Efficient broadband antenna array processing using the discrete fourier form transform“. Awarded by:University of New South Wales - Australian Defence Force Academy. School of Information Technology and Electrical Engineering, 2005. http://handle.unsw.edu.au/1959.4/38690.

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Processing of broadband signals induced on an antenna array using a tapped delay line filter and a set of steering delays has two problems. Firstly one needs to manipulate large matrices to estimate the filter coefficients. Secondly the use of steering delays is not only cumbersome but implementation errors cause loss of system performance. This thesis looks at both of these problems and presents elegant solutions by developing and studying a design method referred to as the DFT method, which does not require steering delays and is computationally less demanding compared to existing methods. Specifically the thesis studies and compares the performance of a time domain element space beamformer using the proposed method and that using an existing method, and develops the DFT method when the processor is implemented in partitioned form. The study presented in the thesis shows that the processors using the DFT method are robust to look direction errors and require less computation than that using the existing method for comparable performance. The thesis further introduces a broadband beamformer design which does not require any steering delays between the sensors and the tapped delay line section as is presently the case. It has the capability of steering the array in an arbitrary direction with a specified frequency response in the look direction while canceling unwanted uncorrelated interferences. The thesis presents and compares the performance of a number of techniques to synthesize an antenna pattern of a broadband array. These techniques are designed to produce isolated point nulls as well as broad sector nulls and to eliminate the need for the steering delays. Two of the pattern synthesis techniques presented in the thesis allow optimization against unwanted interferences in unknown directions. The techniques allow formulation of a beamforming problem such that the processor is not only able to place nulls in specified directions but also able to cancel directional interferences in unknown directions along with a specified frequency response in the look direction over a band of interest. The thesis also presents a set of directional constraints such that one does not need steering delays and an array can be constrained in an arbitrary direction with a specified frequency response. The constraints presented in the thesis are simple to implement. Based on these constraints a pattern synthesis technique for broadband antenna array is also presented.

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Waldron, Jacob S. „Nineteen-Element Phased-Array Feed Development and Analysis on Effects of Focal Plane Offset and Beam Steering on Sensitivity“. Diss., CLICK HERE for online access, 2008. http://contentdm.lib.byu.edu/ETD/image/etd2545.pdf.

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Karimdady, Sharifabad Farnaz. „Covariance Modeling and Space-Time Coding for MIMO systems“. BYU ScholarsArchive, 2013. https://scholarsarchive.byu.edu/etd/3510.

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The full spatial covariance matrix of the multiple input multiple-output (MIMO) channel is an important quantity in channel modeling, communication system signal processing, and performance analysis, and therefore this matrix forms the heart of the research outlined in this dissertation. The work begins with an investigation of a generalized framework for computing the full MIMO spatial covariance based on the power angular spectrum (PAS) of the multipath field and the transmit and receive antenna element radiation patterns. For the case of uniform linear arrays and when the PAS clusters satisfy uniform, truncated Gaussian, or truncated Laplacian distributions, a series expansion is used to allow analytic evaluation of the required integrals in the formulation. The study also demonstrates the validity of some simplifying assumptions used to reduce the complexity of the covariance computation by applying the technique to ray tracing data as well as considers an analysis of the convergence properties of the series when computed using a finite number of terms. The insights and tools obtained from this covariance analysis are then used to develop a general approach for constructing MIMO transmit and receive beamforming vectors based on the full spatial covariance. While transmit and receive beamforming for the MIMO channel is a well-studied topic, when the transmit precoding is based on channel covariance information, developing near-optimal transmit and receive beamformers when the receiver is constrained to use linear processing remains an unsolved problem. This iterative beamforming algorithm presented here can accommodate different types of available channel information and receiver capabilities as well as either a sum power constraint or a per-antenna power constraint. While the latter is more realistic, construction of the optimal transmit precoder is less understood for this constraint. Simulation results based on measured channels demonstrate that the approach generates beamformer solutions whose performance rivals that achieved for an optimal nonlinear receiver architecture.

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Balasubramanian, Sidharth. „STUDIES ON HIGH-SPEED DIGITAL-TO-ANALOG CONVERSION“. The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1376333781.

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Chang, Iuan-Hong, und 張元鴻. „Creative Design of Vehicle Variable-gear-ratio (VGS) Steering System“. Thesis, 2002. http://ndltd.ncl.edu.tw/handle/42227311726021307360.

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碩士
國立臺北科技大學
自動化科技研究所
90
This thesis deals with the research and development of a new variable-gear-ratio steering system (VGS). The main purposes of the variable-gear-ratio steering system are to connect the steering wheel and the front-wheel steering mechanism and to coordinate the turning angle of the front wheels, according to the steering-wheel angle and the speed of the vehicle, in order to maintain a constant “desired yaw rate gain” at a constant speed of vehicle. However, the value of the desired yaw rate gain should be varied at different vehicle speed to give better maneuverability, stability, and mobility. The definition of the above-mentioned “desired yaw rate gain” is the ration between the yaw rate and the steering wheel angle. This research collects all kinds of vehicle variable-gear-ratio (VGS) steering systems from academic journals and patent publications to conduct a thorough classification and kinematic analysis. This research mainly studies the vehicle steering behaviors from the viewpoint of kinematics to develop a new variable-gear-ratio steering system with more ideal performances. This research wants to achieve two goals: first, keep the desired yaw rate gain constant at a constant speed; second, vary the value of the desired yaw rate gain when the vehicle speed is changed. According to the dimensions of the production vehicles and the ideal vehicle cornering properties, this research derived the ideal relationship between the front wheels and the steering wheel when cornering and accomplished the mechanism design of the new variable-gear-ratio steering system. Finally, Pro/ENGINEER software was employed to construct the solid models of the new design and to conduct dynamic simulations and interference check, in order to verify the performance of the new design.

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Van, Eeden Carl-Johann. „The steering relationship between the first and second axles of a 6x6 off-road military vehicle“. Diss., 2007. http://hdl.handle.net/2263/29026.

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The steering arrangement of a 6x6 off-road military vehicle was investigated, with the aim to determine if a variable steering ratio between the first and second steering axle of the vehicle will make an improvement in the steady and transient state handling of the vehicle. Low speed manoeuvring was evaluated, comparing the vehicle steering geometry with Ackerman geometry. For steady state handling, a bicycle model was developed, and constant radius simulations at various track radii, vehicle speeds and steering ratios (ratio between the first and second steering axle) was performed. For transient dynamic simulations, a mathematical model was developed that included a simple driver model to steer the vehicle through a single lane change, again at various speeds and steering ratios. The vehicle was instrumented, and actual constant radii tests, as well as single lane change tests were performed. The measurements enabled the comparison of simulated and measured results. Although basic mathematical models were used, acceptable correlation was obtained for both steady state and transient dynamic behaviour. The results indicated that for this specific vehicle geometry, where the centre of mass is above the second axle, no marked improvement would be obtained by implementing a variable ratio steering system. The mathematical model was changed to simulate a vehicle with longer wheelbase and different centre of mass. With the new geometry, theoretical slip angles (and therefore tire wear) reductions were more noticeable It was concluded that a variable ratio system between the front and second axle would not be an economically viable improvement for this vehicle, since the improvement achieved will not warrant the additional cost and complexity added to the vehicle.
Dissertation (MEng (Mechanical Engineering))--University of Pretoria, 2007.
Mechanical and Aeronautical Engineering
MEng
unrestricted

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„Implementation of Radio-Over-Fiber OFDM System Including a Novel Optical Null-Steering Beamformer“. Thesis, Université Laval, 2008. http://www.theses.ulaval.ca/2008/25825/25825.pdf.

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Lin, You-Hsien, und 林祐賢. „Design and Implementation of Self-Specification Software-Defined Radio with Low-complexity All-Digital Sample Dither Timing Recovery and Receive Beam Steering Techniques“. Thesis, 2016. http://ndltd.ncl.edu.tw/handle/2kxpcc.

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Buchteile zum Thema "Steering Ratio"

Wang, Jun, Zhenhai Gao und Fangming Lou. „Research on Variable Steer Ratio of Active Front Steering System with Fluctuating Velocity“. In Lecture Notes in Electrical Engineering, 475–85. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-33795-6_39.

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Feng, Ying, und Yiming Guo. „Study of Ideal Steering Ratio for Steer-by-Wire System Based on Simulation Test“. In Communications in Computer and Information Science, 540–47. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-25002-6_75.

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Nastasoiu, Mircea, und Nicolae Ispas. „Simultaneous Influences of Tyre Pressure and Steering Geometry upon the Theoretical Speed Ratio in the Running Gear System of Four-Wheel Drive Tractors“. In CONAT 2016 International Congress of Automotive and Transport Engineering, 331–38. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-45447-4_37.

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Abdullahi, Aliyu Buba, Rafael F. S. Caldeirinha, Akram Hammoudeh, Leshan Uggalla und Jon Eastment. „Real Time Multiuser-MIMO Beamforming/Steering Using NI-2922 Universal Software Radio Peripheral“. In Lecture Notes in Networks and Systems, 28–50. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-12388-8_3.

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Arizaca-Cusicuna, Dennis Noel, und Jorge Luis Arizaca-Cusicuna. „Patch Antenna Array Operating at 5G New Radio (NR) Frequency Band with the Ability of Beam Steering“. In Proceedings of the 5th Brazilian Technology Symposium, 193–203. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-57548-9_18.

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Parwez, Md Salik, Hasan Farooq, Ali Imran und Hazem Refai. „Spectral Efficiency Self-Optimization through Dynamic User Clustering and Beam Steering“. In Research Anthology on Developing and Optimizing 5G Networks and the Impact on Society, 79–94. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-7708-0.ch005.

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This paper presents a novel scheme for spectral efficiency (SE) optimization through clustering of users. By clustering users with respect to their geographical concentration we propose a solution for dynamic steering of antenna beam, i.e., antenna azimuth and tilt optimization with respect to the most focal point in a cell that would maximize overall SE in the system. The proposed framework thus introduces the notion of elastic cells that can be potential component of 5G networks. The proposed scheme decomposes large-scale system-wide optimization problem into small-scale local sub-problems and thus provides a low complexity solution for dynamic system wide optimization. Every sub-problem involves clustering of users to determine focal point of the cell for given user distribution in time and space, and determining new values of azimuth and tilt that would optimize the overall system SE performance. To this end, we propose three user clustering algorithms to transform a given user distribution into the focal points that can be used in optimization; the first is based on received signal to interference ratio (SIR) at the user; the second is based on received signal level (RSL) at the user; the third and final one is based on relative distances of users from the base stations. We also formulate and solve an optimization problem to determine optimal radii of clusters. The performances of proposed algorithms are evaluated through system level simulations. Performance comparison against benchmark where no elastic cell deployed, shows that a gain in spectral efficiency of up to 25% is possible depending upon user distribution in a cell.

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Soon, Chin-Boo, und Jairo A. Gutiérrez. „Recognizing RFID as a Disruptive Technology“. In Ubiquitous and Pervasive Computing, 1301–14. IGI Global, 2010. http://dx.doi.org/10.4018/978-1-60566-960-1.ch080.

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Recognizing radio frequency identification (RFID) as a disruptive technology unearths interesting facts that could help managers decide how to approach their RFID projects. RFID for the supply chain (RFID/SC) has attracted global attention and the adoption pace is quickening. It has characteristics resembling that of a disruptive technology. To better understand RFID/SC, we use Christensen’s principles of disruptive technology and the motivation/ability framework to illustrate the uniqueness of RFID/SC. The principles provide valuable information for managers steering their RFID projects toward success. We provide cases studies as vignettes to support the applications of the theories. The objectives of this paper are: (1) to equip managers with the knowledge of disruptive technology in the context of RFID/SC, (2) to highlight the need to assess an organization’s motivation and ability for adopting RFID/SC, and (3) to propose further research areas in RFID/SC in the IS field.

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Michael Wu, Chung-Tse, und Pai-Yen Chen. „Low-Profile Metamaterial-Based Adaptative Beamforming Techniques“. In Modern Printed-Circuit Antennas. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.90012.

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In this chapter, we will review recent research advances on beamforming and spatial multiplexing techniques using reconfigurable metamaterials (MTMs) and metasurfaces. This chapter starts by discussing basic principles and practical applications of transmission line-based metamaterials and planar metasurfaces, followed by their active versions that enable novel smart antennas with beam steering and beamshaping functions. We include detailed descriptions of their practical realizations and the integration with circuits and the radio-frequency (RF) frontend, which are used to adaptively and dynamically manipulate electromagnetic radiation. We summarize the state-of-the-art MTM/metasurface-based beamforming techniques and provide a critical comparison for their uses in the RF-to-millimeter-wave range in terms of cost, reconfigurability, system integratability and radiation properties. These techniques are expected to pave the way for the massive deployment of communication, radar, remote sensing and medical and security imaging systems.

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Lin, Cheng-Min, und Tzong-Jye Liu. „Data Communications Inside Vehicular Environments“. In Wireless Technologies, 847–62. IGI Global, 2012. http://dx.doi.org/10.4018/978-1-61350-101-6.ch320.

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ZigBee is based on IEEE 802.15.4 which specifies the physical layer and medium access control (MAC) for low-cost and low-power LR-WPAN. The technology can be applied in intelligent key, A/C operation and steering wheel inside vehicles. There are two types of devices in ZigBee, FFD and RFD. A FFD can communicate with RFDs and other FFDs, while a RFD can only communicate with a FFD. In ZigBee physical layer, it follows IEEE 802.15.4 standard and operates in unlicensed RF worldwide (2.4GHz global, 915MHz Americas or 868 MHz Europe). A superframe contained an active portion and an inactive portion is used in the MAC layer of ZigBee. The active portion includes CAP and CFP. In the inactive partition, the coordinator can enter sleep mode to save its power. Three main topologies of ZigBee are star, mesh, and tree. However, ZigBee is successfully produced into a low-cost controller applied for automotive applications, including vehicle control and status monitoring. According to the forecast of ON World in 2005 (ON WORLD, 2009), the deployed wireless sensing network nodes will increase to 127 million in 2010 from 1.2 million in 2005. It can be applied in home automation, battlefield surveillance, health care applications and vehicular environments. A wireless sensor network (WSN) constitutes a lot of wireless sensing nodes. In addition, a node in WSN consists of one or more sensors, a radio transceiver, and a microcontroller. The sensor can be used for sensing temperature, pressure, sound, vibration, motion or position, etc. to collect status from devices or environments. The transceiver is used to relay the information of the collected status computed by the microcontroller to a center node, called a gateway or sink. Therefore, a WSN belongs to one type of wireless ad-hoc networks. However, the nodes in a WSN are usually smaller than that in traditional wireless ad-hoc networks regarding node size, computing power, memory size, and transmission rage. In other words, the transmission ability, computing power, and memory size of WSN nodes are limited.

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Konferenzberichte zum Thema "Steering Ratio"

Wei, Jie, Guobiao Shi und Yi Lin. „Design of new variable steering ratio for mechanical active steering system“. In 2013 IEEE International Conference on Vehicular Electronics and Safety (ICVES). IEEE, 2013. http://dx.doi.org/10.1109/icves.2013.6619597.

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Nozaki, Hiromichi, Kensho Mizuno und Takahiko Yoshino. „Effect of Rear-Wheel Active Steering and Variable Steering Wheel Gear Ratio on Proportional Derivative Steering Assistance“. In SAE 2012 Commercial Vehicle Engineering Congress. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2012. http://dx.doi.org/10.4271/2012-01-1936.

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Ahmed, Waqar, Raja Amer Azim und Sana Fatima. „Steering Strategy for a Multi-Axle Wheeled Vehicles“. In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-86323.

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This paper presents a mathematical model for multi-axle steering vehicles operating on level ground. For transporting heavy loads vehicles with multiple axles are required. Apart from added complexity steering of multiple axle for turning is a big challenge. Due to type of load being carried a single unit vehicle is sometimes preferred. The mathematical model of a six axle vehicle with 4-axle steering system is developed. Simulations at various track radii, vehicle speeds and steering ratios (ratio between the first, second, fifth and sixth steering axle) are performed. Axle steering angles and wheel slip angles are evaluated. The steering ratio requirements vary with vehicle speed and turn radius. A configuration is selected for better performance for a wider range. The resulting steering ratios show good vehicle maneuverability, stability and steering efficiency.

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Fang Li, Lifang Wang, Chenglin Liao und Yan Wu. „Active steering control strategy of steer-by-wire system based on variable steering ratio“. In 2014 IEEE Transportation Electrification Conference and Expo, Asia-Pacific (ITEC Asia-Pacific). IEEE, 2014. http://dx.doi.org/10.1109/itec-ap.2014.6940706.

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Zong, Changfu, Li Mai, Bo Hu und Zhenhai Gao. „Research on Steer-by-Wire System With Ideal Steering Ratio and 4WS“. In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-81183.

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This paper has studied the variable steering ratio for steering-by-wire (SBW) based on the 29 DOF vehicle dynamic model, which kept the steering gain of vehicle constant. And the steering ratio varied with the vehicle velocity and hand wheel angles. We have proposed three control strategies for SBW including front wheel control, yaw rate feedback control and yaw rate & acceleration feedback control. We compared these three control methods by simulation and simulator tests. We have researched the forward and feedback control methods in the four wheels (4WS) for SBW system. And compared with 2WS for SBW and the classical 4WS. The results indicated that 4WS for SBW could improve the vehicle handling.

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Nozaki, Hiromichi. „Influence of Steering Wheel Gear Ratio on Drift Control“. In Future Transportation Technology Conference & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2005. http://dx.doi.org/10.4271/2005-01-3473.

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Shimizu, Yasuo, Toshitake Kawai und Junji Yuzuriha. „Improvement in Driver-Vehicle System Performance by Varying Steering Gain with Vehicle Speed and Steering Angle: VGS (Variable Gear-Ratio Steering System)“. In International Congress & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1999. http://dx.doi.org/10.4271/1999-01-0395.

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Oshima, Atsushi, Xu Chen, Sumio Sugita und Masayoshi Tomizuka. „Control Design for Cancellation of Unnatural Reaction Torque and Vibrations in Variable-Gear-Ratio Steering System“. In ASME 2013 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/dscc2013-3797.

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Variable-gear-ratio steering is an advanced feature in automotive vehicles. As the name suggest, it changes the steering gear ratio depending on the speed of the vehicle. This feature can simplify steering for the driver, which leads to various advantages, such as improved vehicle comfort, stability, and safety. One serious problem, however, is that the variable-gear-ratio system generates unnatural torque to the driver whenever the variable-gear-ratio control is activated. Such unnatural torque includes both low-frequency and steering-speed-dependent components. This paper proposes a control method to cancel this unnatural torque. We address the problem by using a tire sensor and a set of feedback and feedforward algorithms. Effectiveness of the proposed method is experimentally verified using a hardware-in-the-loop experimental setup. Stability and robustness under model uncertainties are evaluated.

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Zheng, Hongyu, Jinghuan Hu und Shuo Yang. „Variable Steering Ratio Design for Vehicle Steer-by-Wire System with Joystick“. In SAE 2016 World Congress and Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2016. http://dx.doi.org/10.4271/2016-01-0455.

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Heathershaw, Andrew. „Optimizing Variable Ratio Steering for Improved On-Centre Sensitivity and Cornering Control“. In SAE 2000 World Congress. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2000. http://dx.doi.org/10.4271/2000-01-0821.

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