The reviewer’s comment: 1. On page

The reviewer’s comment: 1. On page 2, “One is that the controller needs to consider the initialvalue e(0)” should be replaced with “One is that the design of the controller needs to considerthe sign of the initial value e(0)”, “However, the construction of disturbance observer was notconsidered in [31]” needs to be explained clearly.Response:Thank you very much for this comment. We modified the sentence “One is that the controllerneeds to consider the initial value e(0)” as “One is that the design of the controller needs to consider the sign of the initial value e(0)” and further explained the literature [31] as “To tackle above defects, an improved PPC methodology was proposed in [31]. And [31] only discussed the situation that external disturbances were unknown. However, some known information of nonlinearfunctions may not be able to provide in the practical control system. Therefore, it is necessaryto discuss that how to accurately estimate unknown nonlinear functions and external disturbancesunder the condition that the tracking error meets the PPB.”.