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基于POE的動力學(xué)建模與快速非奇異終端滑??刂?/div>
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國家自然科學(xué)基金創(chuàng)新研究群體資助項目(51221004)、浙江省自然科學(xué)基金資助項目(LY13E050001)和杭州市重大科技創(chuàng)新資助項目(20132111A04)


Dynamic Modeling Based on POE and Non-singular Terminal Sliding Mode Control
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    摘要:

    結(jié)合旋量指數(shù)積形式(POE)和凱恩方程的優(yōu)點,提出了一種具有明顯幾何意義的高效動力學(xué)建模方法,并以此為基礎(chǔ)提出機器人系統(tǒng)的快速非奇異終端滑??刂扑惴?。凱恩方程中的偏速度選擇為基于旋量理論描述的合適的物體雅可比矩陣,并以此定義其他動力學(xué)模型參數(shù)表達(dá)方式,且在“錢江一號”串聯(lián)機器人上進行建模實例驗證。基于該動力學(xué)模型,為了改善傳統(tǒng)滑模控制的有限時間收斂特性,保證全局控制非奇異性,提出了一種快速全局非奇異終端滑??刂疲ㄟ^構(gòu)造帶狀態(tài)高次項的滑模面函數(shù),得到全局非奇異控制,并保證系統(tǒng)從任意狀態(tài)到達(dá)滑模面的時間和在滑模上到達(dá)平衡點的時間均為有限且快速收斂,通過李雅普諾夫函數(shù)證明了其穩(wěn)定性,并結(jié)合對比實驗,驗證了該方法在機器人系統(tǒng)中的魯棒性和有效性。

    Abstract:

    To compact the dynamic analysis and improve the computation efficiency, the advantages of Kanes equations and the product of exponential (POE) formulas were combined based on screw theory to propose a new effective dynamic modeling of robot manipulator with explicit geometric significance, and based on this dynamic model, a non-singular terminal sliding mode control was presented to achieve better performance. The velocity Jacobian matrix was addressed in the product of exponential form by introducing the screw theory, and the partial velocity of Kane’s equations was selected specifically from the suitable velocity Jacobian matrix. Then a dynamic modeling example based on Kane’s equations and screw theory was established, which led to be less complicated compared with other typically dynamic methods. With the proposed dynamic equations of serial robot manipulator, a fast non-singular terminal sliding mode (FNTSM) control was presented by introducing an improved fast non-singular terminal sliding mode surface, which was designed to ensure the fast convergence in global system state whether it was near to equilibrium or far away from the equilibrium. Then the stability analysis of the proposed method was performed by using Lyapunov stability theory. Finally, comparative experiments were implemented to demonstrate the effectiveness and robustness of the proposed approach.

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陳慶誠,朱世強,Rajat Mittal,張學(xué)群.基于POE的動力學(xué)建模與快速非奇異終端滑??刂芠J].農(nóng)業(yè)機械學(xué)報,2015,46(6):310-318. Chen Qingcheng, Zhu Shiqiang, Rajat Mittal, Zhang Xuequn. Dynamic Modeling Based on POE and Non-singular Terminal Sliding Mode Control[J]. Transactions of the Chinese Society for Agricultural Machinery,2015,46(6):310-318.

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  • 收稿日期:2015-03-15
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  • 在線發(fā)布日期: 2015-06-10
  • 出版日期: 2015-06-10