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| 1 | Aerodynamic drag reduction of heavy vehicles using append devices by CFD analysis显示文摘Improving vehicle fuel consumption,performance and aerodynamic efficiency by drag reduction especially in heavy vehicles is one of the indispensable issues of automotive industry.In this work,the effects of adding append devices like deflector and cab vane corner on heavy commercial vehicle drag reduction were investigated.For this purpose,the vehicle body structure was modeled with various supplementary parts at the first stage.Then,computational fluid dynamic(CFD) analysis was utilized for each case to enhance the optimal aerodynamic structure at different longitudinal speeds for heavy commercial vehicles.The results show that the most effective supplementary part is deflector,and by adding this part,the drag coefficient is decreased considerably at an optimum angle.By adding two cab vane corners at both frontal edges of cab,a significant drag reduction is noticed.Back vanes and base flaps are simple plates which can be added at the top and side end of container and at the bottom with specific angle respectively to direct the flow and prevent the turbulence.Through the analysis of airflow and pressure distribution,the results reveal that the cab vane reduces fuel consumption and drag coefficient by up to 20 % receptively using proper deflector angle.Finally,by adding all supplementary parts at their optimized positions,41% drag reduction is obtained compared to the simple model. | Mehrdad khosravi Farshid Mosaddeghi Majid Oveisi Ali Khodayari Bavil | 2015 | Journal of Central South University2015，22，12： | 15 |
| 2 | Nonlinear adaptive optimal control for vehicle handling improvement through steer-by-wire system显示文摘A control algorithm for improving vehicle handling was proposed by applying right angle to the steering wheel,based on the nonlinear adaptive optimal control(NAOC).A nonlinear 4-DOF model was initially developed,then it was simplified to a 2-DOF model with reasonable assumptions to design observer and optimal controllers.Then a simplified model was developed for steering system.The numerical simulations were carried out using vehicle parameters for standard maneuvers in dry and wet road conditions.Moreover,the hardware in the loop method was implemented to prove the controller ability in realistic conditions.Simulation results obviously show the effectiveness of NAOC on vehicle handling and reveal that the proposed controller can significantly improve vehicle handling during severe maneuvers. | Vahid Tavoosi Reza Kazemi Atta Oveisi | 2014 | Journal of Central South University2014，21，1： | 8 |
| 3 | Design of an optimal active stabilizer mechanism for enhancing vehicle rolling resistance显示文摘Improving rollover and stability of the vehicles is the indispensable part of automotive research to prevent vehicle rollover and crashes.The main objective of this work is to develop active control mechanism based on fuzzy logic controller(FLC) and linear quadratic regulator(LQR) for improving vehicle path following,roll and handling performances simultaneously.3-DOF vehicle model including yaw rate,lateral velocity(lateral dynamic) and roll angle(roll dynamic) were developed.The controller produces optimal moment to increase stability and roll margin of vehicle by receiving the steering angle as an input and vehicle variables as a feedback signal.The effectiveness of proposed controller and vehicle model were evaluated during fishhook and single lane-change maneuvers.Simulation results demonstrate that in both cases(FLC and LQR controllers) by reducing roll angle,lateral acceleration and side slip angles remain under 0.6g and 4° during maneuver,which ensures vehicle stability and handling properties.Finally,the sensitivity and robustness analysis of developed controller for varying longitudinal speeds were investigated. | Yaghoub Pourasad Mehdi Mahmoodi-k Majid Oveisi | 2016 | Journal of Central South University2016，23，5： | 6 |
| 4 | 使用综合防摇杆和卷取弹簧机构优化重型越野车悬架系统的稳定性(英文)显示文摘短悬架系统对车辆操纵和行驶有重要的影响,因此优化车辆悬架系统是提高车辆稳定性和操纵性的有效方法之一。运动控制、稳定性维护和平顺性改善是越野车悬架系统设计中的基本问题。基于Trucksim软件,建立了一种主要应用于越野车的依赖悬架系统。然后,利用综合防摇杆和卷取弹簧对悬架系统的几何参数进行优化,提高了车辆的平顺性、操纵性和稳定性。Trucksim提供了悬架系统的仿真结果和由于路面粗糙度和转向角不同而引起的几何参数的变化,并比较了在优化和非优化条件下,悬架系统在各种驾驶操纵中的优化效果。仿真结果表明,悬架系统类型和几何参数对车辆性能有显著影响。 | Ilgar JAVANSHIR Andino MASELENO Shahin TASOUJIAN Majid OVEISI | 2018 | Journal of Central South University2018，25，9： | 3 |
| 5 | 查看详情显示文摘 | Shaterian H R Oveisi A R | | 0，，： | 1 |
| 6 | Breakage behaviour of wood pellets due to free fall显示文摘 | Oveisi E Lau A Sokhansanj S | 2013 | Powder Technology2013，235，： | 1 |
| 7 | Induction of oxidative stress by glutathione depletion cause severe hypertension in normal rats显示文摘 | Vaziri ND Wang XQ Oveisi F | 2000 | Hypertension2000，39，1： | 1 |
| 8 | Oleylethanolamide regulates feeding and body weight through activation of the nuclear receptor PPAR-α 显示文摘 | Fu J Gaetani S Oveisi F | 2003 | Nature2003，425，6953： | 1 |
| 9 | Effect of antioxidant therapy on blood pressure and NO synthase expression in hypertensive rats显示文摘 | Vaziri ND Ni Z Oveisi F | 2000 | Hypertension2000，36，6： | 1 |
| 10 | Oleylethanolamide regulates feeding and body weight through activation of the nuclear receptor PPAR-α显示文摘 | Fu J Gaetani S Oveisi F | 2003 | Nature2003，425，： | 1 |
| 11 | Induction of oxida- tive stress by glutathione depletion causes severe hypertension in normal rats显示文摘 | VAZIRI ND WANG XQ OVEISI F | 2000 | Hypertension2000，36，： | 1 |
| 12 | Induction of oxidative stress by glutathione depletion cause severe hypertension in normal rats 显示文摘 | Vaziri ND Wang XQ Oveisi F | 2000 | Hypertension2000，36，1： | 1 |
| 13 | Induction of oxidative stress by glutathione depletion causes severe hypertension in normal rats 显示文摘 | Vaziri ND Wang XQ Oveisi F | 2000 | Hy- pertension2000，36，1： | 1 |
| 14 | Effect of metformin and pioglitazone treatment on cardiovascular risk profile in polycystic ovary syndrome显示文摘 | Ziaee A Oveisi S Abedini A | 2012 | Acta Med Indones2012，44，1： | 1 |
| 15 | Oleylethanolamide regulates feeding and body weight through activation of the nuclear receptor PPAR-a 显示文摘 | Fu J Gaetani S Oveisi F | 2003 | Nature2003，425，： | 1 |
| 16 | Role of secondary hyperparathyroidism in the genesis of hypertriglyeeridemia and VLDL receptor deficiency in chronic renal failure 显示文摘 | Liang K Oveisi F Vaziri ND | 1998 | Kidney Int1998，53，3： | 1 |
| 17 | Effects of additive therapy with spironolactone on albuminuria in diabetes mellitus: A pilot randomized clinical trial 显示文摘 | Ziaee A Abbas Vaezi A Oveisi S | 2013 | CaspianJ Intern Med2013，4，： | 1 |
| 18 | Induction of oxidative stress by glutathione depletion causes severe hypertension in normal rats显示文摘 | Vaziri ND Wang XQ Oveisi F | 2000 | Hypertension2000，36，1： | 1 |
| 19 | Efficiency of Mesosulfuron-methyl and Clodinafop-propargyl Dose for the Control of LoliumPerenne in Wheat显示文摘 | VAZAN S OVEISI M BAZIAR S | 2011 | Crop Protection2011，30，6： | 1 |
| 20 | Tree - Structured FeatureExtraction Using Mutual Information 显示文摘 | Oveisi F Erfanian A Patras I | 2012 | IEEE Transac-tions on Neural Networks and Learning Systems2012，23，1： | 1 |
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