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基于局部線性化的汽車質(zhì)心側(cè)偏角估計(jì)
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國(guó)家高技術(shù)研究發(fā)展計(jì)劃(863計(jì)劃)資助項(xiàng)目(2009AA11Z216);國(guó)家自然科學(xué)基金資助項(xiàng)目(50908008)


Estimation of Vehicle Sideslip Angle Based on Local Linearization
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    摘要:

    對(duì)于汽車側(cè)偏角估計(jì),現(xiàn)有非線性狀態(tài)觀測(cè)器反饋增益的設(shè)計(jì)大多采用解析法,但其僅適用于表達(dá)式較簡(jiǎn)單的輪胎模型。提出一種基于局部線性化設(shè)計(jì)狀態(tài)觀測(cè)器反饋增益的數(shù)值方法,使得采用精度更高、表達(dá)式更復(fù)雜的輪胎模型成為可能。將非線性系統(tǒng)在狀態(tài)變量空間中離散化,采用數(shù)值計(jì)算獲得若干個(gè)工作點(diǎn)處的反饋增益。為便于實(shí)時(shí)觀測(cè)應(yīng)用,這些離散的反饋增益值被擬合為關(guān)于狀態(tài)變量的函數(shù)。在一個(gè)高精度的車輛動(dòng)力學(xué)實(shí)時(shí)仿真環(huán)境中驗(yàn)證了所提出側(cè)偏角估計(jì)方法的有效性及其對(duì)參數(shù)變化的魯棒性。仿真結(jié)果表明,所提出估計(jì)方法估計(jì)精度較高,具有較好的魯棒性。

    Abstract:

    A numerical methodology for designing observer feedback gains based on local linearization was proposed to make employing tire models with a higher accuracy and more complicated expressions become possible. The proposed methodology was implemented by discretization of the nonlinear system in the state space and calculation of the feedback gains at a certain given number of operating points using numerical approaches. The gains at discretized operating points were fitted to the expressions with respect to state variables to facilitate realtime observation and implementations. The effectiveness and parameter variation robustness of the proposed methodology were evaluated in a highfidelity vehicle dynamics simulation environment, and the simulation results show that the proposed methodology has a high estimation accuracy and good robustness.

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丁能根,李丹華,許景,王健,余貴珍.基于局部線性化的汽車質(zhì)心側(cè)偏角估計(jì)[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2012,43(1):6-11. Ding Nenggen, Li Danhua, Xu Jing, Wang Jian, Yu Guizhen. Estimation of Vehicle Sideslip Angle Based on Local Linearization[J]. Transactions of the Chinese Society for Agricultural Machinery,2012,43(1):6-11.

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  • 在線發(fā)布日期: 2012-01-12
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