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基于履帶式聯(lián)合收獲機轉(zhuǎn)向特性的局部跟蹤路徑規(guī)劃
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江蘇省現(xiàn)代農(nóng)機裝備與技術(shù)示范推廣項目(NJ2021-59,、NJ2020-61)


Local Tracking Path Planning Based on Steering Characteristics of Crawler-type Combine Harvester
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    為降低履帶式聯(lián)合收獲機導(dǎo)航路徑跟蹤轉(zhuǎn)向控制頻率和提高控制系統(tǒng)的穩(wěn)定性,,提出了一種預(yù)瞄-切線局部跟蹤路徑動態(tài)規(guī)劃算法。規(guī)劃的局部跟蹤路徑由平滑連接的兩段弧線組成,,第1段圓弧由收獲機當(dāng)前位姿與1/2橫向偏差線上的預(yù)瞄點確定,,第2段圓弧由收獲機在1/2橫向偏差線的實際位姿與期望路徑的幾何關(guān)系確定;基于收獲機實際轉(zhuǎn)向運動特性建立了相適應(yīng)的轉(zhuǎn)向控制模型,,左轉(zhuǎn),、右轉(zhuǎn)控制模型擬合的決定系數(shù)R2分別為0.978、0.980,。田間直線導(dǎo)航跟蹤對比試驗表明:當(dāng)前進速度為0.4,、0.8m/s時,橫向偏差的標(biāo)準(zhǔn)差分別為0.0489,、0.0507m,,航向偏差的標(biāo)準(zhǔn)差分別為3.94°、4.66°,,轉(zhuǎn)向控制次數(shù)分別為19,、12次;與傳統(tǒng)純追蹤算法相比,橫向偏差的標(biāo)準(zhǔn)差分別減小19.04%,、31.30%,,航向偏差的標(biāo)準(zhǔn)差分別減小25.94%、9.16%,,轉(zhuǎn)向控制次數(shù)分別減少47.22%,、42.86%。本研究可為履帶式農(nóng)機車輛導(dǎo)航控制器設(shè)計提供參考,。

    Abstract:

    To reduce the navigation path tracking steering control frequency of crawler-type combine harvester and improve the stability of the control system, an aiming-tangent local tracking path dynamic planning algorithm was proposed. The planned local tracking path consisted of two smoothly connected arcs, the first arc defining the aiming point on the line of 1/2 lateral deviation from the current position of the harvester, and the second arc defining the geometry of the desired path from the actual positioning of the harvester on the line of 1/2 lateral deviation. An adapted steering control model was established based on the actual steering motion characteristics of the harvester, with R2 of 0.978 and 0.980 fitted to the left-turn and right-turn control models, respectively. The straight-line navigation tracking comparison test in the field showed that the standard deviation of lateral deviation was 0.0489m and 0.0507m, the standard deviation of heading deviation was 3.94°and 4.66°, and the number of steering control was 19 and 12 when the vehicle speed was 0.4m/s and 0.8m/s, correspondingly. Compared with the conventional aiming pursuit algorithm, the standard deviation of lateral deviation was reduced by 19.04% and 31.30%, the standard deviation of heading deviation was reduced by 25.94% and 9.16%, and the number of steering control was reduced by 47.22% and 42.86%, respectively. The results can provide a reference for crawler-type agricultural vehicles navigation controllers.

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何永強,周俊,袁立存,鄭彭元,梁子安.基于履帶式聯(lián)合收獲機轉(zhuǎn)向特性的局部跟蹤路徑規(guī)劃[J].農(nóng)業(yè)機械學(xué)報,2022,53(11):13-21. HE Yongqiang, ZHOU Jun, YUAN Licun, ZHENG Pengyuan, LIANG Zi’an. Local Tracking Path Planning Based on Steering Characteristics of Crawler-type Combine Harvester[J]. Transactions of the Chinese Society for Agricultural Machinery,2022,53(11):13-21.

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  • 收稿日期:2021-12-27
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  • 在線發(fā)布日期: 2022-11-10
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