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Nonlinear adaptive optimal control for vehicle handling improvement through steer-by-wire system 被引量:8
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作者 Vahid Tavoosi Reza Kazemi Atta Oveisi 《Journal of Central South University》 SCIE EI CAS 2014年第1期100-112,共13页
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 ... 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. 展开更多
关键词 HANDLING vehicle STEER-BY-WIRE controller nonlinear adaptive optimal control hardware loop method
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Dynamic Power Dissipation Control Method for Real-Time Processors Based on Hardware Multithreading
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作者 罗新强 齐悦 +1 位作者 王磊 王沁 《China Communications》 SCIE CSCD 2013年第5期156-166,共11页
In order to eliminate the energy waste caused by the traditional static hardware multithreaded processor used in real-time embedded system working in the low workload situation, the energy efficiency of the hardware m... In order to eliminate the energy waste caused by the traditional static hardware multithreaded processor used in real-time embedded system working in the low workload situation, the energy efficiency of the hardware multithread is discussed and a novel dynamic multithreaded architecture is proposed. The proposed architecture saves the energy wasted by removing idle threads without manipulation on the original architecture, fulfills a seamless switching mechanism which protects active threads and avoids pipeline stall during power mode switching. The report of an implemented dynamic multithreaded processor with 45 nm process from synthesis tool indicates that the area of dynamic multithreaded architecture is only 2.27% higher than the static one in achieving dynamic power dissipation, and consumes 1.3% more power in the same peak performance. 展开更多
关键词 dynamic power dissipation control real-time processor hardware multithread low power design energy efficiency
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