一类非线性系统的新型趋近律非奇异终端滑模控制

Non-singular Terminal Sliding Model Control of Novel Reaching Law for a Class of Nonlinear Systems

  • 摘要: 针对一类非线性不确定系统,分析已有终端滑模控制奇异、抖振和收敛缓慢的问题,首次将非奇异终端滑动切换函数和新型趋近律同时应用到滑模控制中,在非奇异终端滑模控制消除奇异值的前提下,引入基于幂次趋近律的新型趋近律,设计了新型非奇异终端滑模控制器并验证其稳定性.将其应用于倒立摆系统,解决了奇异问题,提高了系统状态远离滑模面时的趋近性能,缩短了收敛时间,同时削弱了抖振,表明了该方法的有效性.

     

    Abstract: Aimed at addressing the problems of singularity, chattering, and slow convergence of the terminal sliding-mode control for a class of nonlinear uncertain systems, a nonsingular terminal sliding switch function and a novel reaching law are applied together to the sliding-mode control for the first time. Under the assumption of eliminating the singular value, a novel law based on the power-reaching law is introduced to design a new type of nonsingular terminal sliding-mode controller, and its stability is verified. By using the new controller in an inverted pendulum system, it is proved that the reaching performance when system state is far away from sliding surface is enhanced, and system singularity is simultaneously solved. The simulation results show that the system quickly converged to equilibrium, and that the proposed method is effective.

     

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