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Adaptive Neural Dynamic Surface Control for Pure-Feedback Systems With Input Saturation  243























                            Figure 15.2 Tracking performance of y =−0.2cos(3πt) + 0.2.
                                                         d






















                            Figure 15.3 Tracking errors of y =−0.2cos(3πt) + 0.2.
                                                   d

                               From all the simulation results, we can find that compared with other
                            two controllers (i.e., S2 and S3), the proposed control S1 can obtain better
                            tracking performance with respect to tracking errors, convergence speed,
                            and control cost.


                            15.5 CONCLUSION

                            In this chapter, an adaptive neural dynamic surface sliding mode control
                            is proposed for uncertain pure-feedback non-linear systems with unknown
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