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基于全輪縱向力優(yōu)化分配的4WD車輛直接橫擺力矩控制 4
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DYC Based on Tire Longitudinal Forces Optimization Distribution
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    摘要:

    為了充分利用四輪獨(dú)立驅(qū)動(4WD)與直接橫擺力矩控制(DYC)各自的優(yōu)勢，提出了基于全輪縱向力優(yōu)化分配的4WD車輛DYC系統(tǒng)方案。利用改進(jìn)的2DOF車輛模型制定DYC穩(wěn)定性控制目標(biāo)，設(shè)計(jì)基于最優(yōu)動態(tài)滑模的“前饋＋反饋”DYC控制器。建立全輪縱向力優(yōu)化分配模式，結(jié)合HSRI輪胎模型設(shè)計(jì)了降低整車路面附著負(fù)荷的目標(biāo)函數(shù)，并通過約束優(yōu)化得出全輪縱向力分配值。研究表明，全輪縱向力優(yōu)化分配可提高整車路面附著余量，進(jìn)一步提升了DYC系統(tǒng)的控制性能。

    Abstract:

    A new 4WD vehicle DYC system based on the tire longitudinal forces optimization distribution was proposed to combine the advantages of DYC and the independent four-wheel-drive chassis. The modified 2DOF vehicle model was utilized to obtain the DYC target for vehicle stability. The “feedforward + feedback” DYC controller was designed with the optimal dynamical sliding mode. The tire longitudinal forces optimization distribution mode was established with the stability index combining HSRI tire model to increase the vehicle-road grip margin. The index was constraining calculated to obtain tire forces distribution results. The simulation result shows that the remaining part of the vehicle-road adhesion is increased by the optimization distribution under DYC, which means the vehicle stability potential is improved than using the general distribution method, i.e. DYC is enhanced further.

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鄒廣才,羅禹貢,李克強(qiáng).基于全輪縱向力優(yōu)化分配的4WD車輛直接橫擺力矩控制 4[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2009,40(5):1-6. DYC Based on Tire Longitudinal Forces Optimization Distribution[J]. Transactions of the Chinese Society for Agricultural Machinery,2009,40(5):1-6.

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