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首页> 外文期刊>JSME International Journal. Series C, Mechanical Systems, Machine Elements and Manufacturing >LQR Controller for Toroidal Continuously Variable Transmission in Reverse Motion
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LQR Controller for Toroidal Continuously Variable Transmission in Reverse Motion

机译:反向运动中环形无级变速器的LQR控制器

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摘要

The system considered in this paper is a Toroidal Continuously Variable Transmission (TCVT) system for cars. This system is unstable in reverse motion as some mechanical parts have been removed from the original one for cost reduction, and the gear ratio has to be regulated around its nominal value for car reverse motion. The control theory used here is the Linear Quadratic Regulator (LQR) associated to a gain-scheduling technique, as the TCVT system is nonlinear according to the car speed. Moreover, as the LQR method requires the entire TCVT state vector and as the only available signal is the gear ratio, a full-order observer is designed. In order to take the other nonlinearities of the system into account, the observer is nonlinear: a diffeomorphism is then used for converting the variables provided by the nonlinear observer into the needed variables. In order to verify the effectiveness and the robustness of the controller against the car speed and the torque shift disturbance phenomenon, several experiments with a test-bed and with an actual vehicle have been performed and showed the efficiency of the proposed controller.
机译:本文考虑的系统是用于汽车的环形无级变速器(TCVT)系统。该系统在反向运动中不稳定,因为一些机械零件已从原始零件中移除以降低成本,并且对于汽车反向运动,必须将齿轮比调节在其标称值附近。这里使用的控制理论是与增益调度技术相关的线性二次调节器(LQR),因为TCVT系统根据车速是非线性的。此外,由于LQR方法需要整个TCVT状态向量,并且由于唯一可用的信号是齿轮比,所以设计了一个全阶观测器。为了考虑系统的其他非线性,观察者是非线性的:微分同构用于将非线性观察者提供的变量转换为所需变量。为了验证控制器对车速和扭矩变化扰动现象的有效性和鲁棒性,已在试验台和实际车辆上进行了几次实验,并证明了所提出控制器的效率。

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