汽 车 工 程
2021 43 3 Automotive Engineering 2021
年(第 卷)第 期 ( )
doi .
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两挡变速器换挡过程最优控制的伪谱法求解
刘晓坤,赵鑫鑫
100083
(北京科技大学机械工程学院,北京 )
[摘要] 随着新能源汽车的发展,采用多挡位变速器在保证车辆动力性的前提下,可以提高电机效率。为了减
小换挡冲击,提升乘坐舒适性,需要对驱动电机和换挡电机进行协调控制。本文中以两挡变速器为研究对象,提出
Radau
了一种基于 伪谱法的变速器换挡策略,选取冲击度和滑摩功作为两挡变速器换挡品质的评价函数,利用插值
多项式对换挡过程中系统的状态变量和控制变量进行逼近,由插值多项式的导数值近似代替动力学方程中状态变
量的微分值,将换挡过程的最优控制问题转换为非线性规划问题,并利用现有的非线性规划问题求解器进行求解。
MATLAB
采用 软件对两挡变速器的换挡问题进行伪谱法求解,得到了两挡变速器换挡过程的最优控制轨迹,验证了
伪谱法的有效性和优异性。
关键词:两挡变速器;换挡品质;伪谱法;最优控制
Pseudo-spectral Method for Optimal Control of Two-Speed
Transmission in Shift Process
Liu Xiaokun & Zhao Xinxin
100083
School of Mechanical Engineering,University of Science and Technology Beijing,Beijing
With the development of electric vehicles multi-gear transmission can improve the efficiency of
[Abstract] ,
the motor under the premise of ensuring the power performance of the vehicle. In order to reduce the impact of shift-
ing and improve ride comfort coordinated control of the drive motor and the shift motor is required. In this paper
, ,
taking the two-speed transmission as the research object a shift strategy based on Radau pseudo spectral method is
,
p
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