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      2. 山地果茶園輪式運輸機半主動懸架系統設計
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        華南農業大學

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        基金項目:

        廣東省科技計劃項目(No. 2019B020214001);廣東省現代農業產業技術體系創新團隊—茶葉產業創新團隊設施與機械化崗位專家(2019LM119);廣東省科技計劃項目(2017A090905020)


        Design of Semi-active Suspension System for Wheel Transporter in Mountain Fruit Tea Garden
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        Fund Project:

        Guangdong science and technology plan project (No. 2019b020214001); Guangdong modern agricultural technology system innovation team - tea industry innovation team facility and mechanization post expert (2019lm119); Guangdong science and technology plan project (2017a090905020)

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          摘要:

          為了解決山地果茶園運輸機在實際使用中產生的振動劇烈問題,設計一種使用CDC阻尼器的半主動懸架系統,采用模糊PID控制方法,進行裝車試驗。根據懸架系統動力學模型,利用MATLAB建立模糊PID控制器的Simulink模型,對其進行分析和參數調整,得到理想的仿真響應結果,通過分析可知,半主動懸架系統的性能比被動懸架系統提升了10%~20%。設計半主動懸架系統的硬件部分并進行裝車試驗,系統機械結構部分包括彈性元件、減振器改制、導向機構以及各零件連接件,考慮前軸布置空間進行系統布置,采用減振器斜向排布的方式進行系統布置,其與水平面夾角為30°,彈性元件為垂向布置,導向機構安裝在前軸中間位置,用以限制前軸前后的運動并約束垂直方向的運動軌跡。根據設計的模糊PID控制器進行控制電路系統的設計,進行半主動懸架的裝車試驗,利用振動儀和振動傳感器搭建振動測試系統,測試車輛在行駛過程中座椅位置z軸的振動信號,分別在速度和載重一定的工況下,通過半主動懸架裝車前后的測試結果對比,裝有半主動懸架的運輸機振動降幅達為50%,達到了半主動懸架系統的設計要求。裝有半主動懸架系統的車身振動頻率集中范圍大于8Hz,表明車輛的駕駛舒適性較好。

          Abstract:

          In order to solve the problem of severe vibration caused by fruit tea garden conveyer in practical use, a semi-active suspension system using CDC damper was designed, and the loading test was carried out by using fuzzy PID control method. According to the suspension system dynamics model, MATLAB was used to establish a Simulink model of fuzzy PID controller, which was analyzed and the parameters were adjusted, and the ideal simulation response results were obtained. Through the analysis, the performance of semi-active suspension system was improved by 10% ~ 20% compared with that of passive suspension system. Design of hardware part of the semi-active suspension system and loading test, the system of mechanical parts including the elastic element structure, shock absorber, steering mechanism, and the parts fitting the transformation, consider front axle layout space arrangement, the shock absorber system layout in the form of oblique arranged with the horizontal plane Angle of 30 °, elastic element for vertical layout, steering mechanism installed in the middle of the front axle position, to limit the movement before and after the front axle and constraint the trajectories of vertical direction. According to the design of fuzzy PID controller for the design of control circuit system, the semi-active suspension loading experiment was carried out, using vibration meter and vibration sensor system is built, the test vehicle in the process of driving seat position z axis vibration signal, respectively in speed and load conditions, through the semi-active suspension before and after loading, the results of test of conveyor with semi-active suspension vibration drop of about 50%, reached the design requirements of the semi-active suspension system.The vibration frequency concentration range of the vehicle body with semi-active suspension system is more than 8Hz, indicating that the driving comfort of the vehicle is better.

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        • 收稿日期:2019-12-13
        • 最后修改日期:2020-01-20
        • 錄用日期:2020-02-13
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