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| 1 | Vehicle path tracking by integrated chassis control显示文摘The control problem of trajectory based path following for passenger vehicles is studied. Comprehensive nonlinear vehicle model is utilized for simulation vehicle response during various maneuvers in MATLAB/Simulink. In order to follow desired path, a driver model is developed to enhance closed loop driver/vehicle model. Then, linear quadratic regulator(LQR) controller is developed which regulates direct yaw moment and corrective steering angle on wheels. Particle swam optimization(PSO) method is utilized to optimize the LQR controller for various dynamic conditions. Simulation results indicate that, over various maneuvers, side slip angle and lateral acceleration can be reduced by 10% and 15%, respectively, which sustain the vehicle stable. Also, anti-lock brake system is designed for longitudinal dynamics of vehicle to achieve desired slip during braking and accelerating. Proposed comprehensive controller demonstrates that vehicle steerability can increase by about 15% during severe braking by preventing wheel from locking and reducing stopping distance. | Saman Salehpour Yaghoub Pourasad Seyyed Hadi Taheri | 2015 | Journal of Central South University2015，22，4： | 9 |
| 2 | 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 |
| 3 | Synthesis and characterization of nanocrystalline titanium nitride powder from rutile and anatase as precursors显示文摘 | Roya Aghababazadeh Ali Reza Mirhabibi Brian Rand Sara Banijamali Jalil Pourasad Mehdi Ghahari | 2006 | Surface Science2006，，13： | 1 |
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