Fixed-time Global Prescribed Performance Control for Vehicular Platoons With Actuator Nonlinearities
The paper proposes a fixed-time global prescribed performance control(GPPC)scheme for the vehicular platoon system with actuator nonlinearities.A smooth equivalent transformation is first designed,with which both dead-zone and saturation can be handled under the same framework,while the inflection point problem caused by actuator nonlinearities is also dealt with.A global prescribed performance method,based on two novel perform-ance functions,is constructed,while guaranteeing the tracking error converges to a predetermined range within a fixed time,eliminating the limitation that the initial value of the error needs to be known in advance,and reducing the overshoot of the error.Then,based on the proposed equivalent transformation and prescribed performance method,a fixed-time sliding mode fault-tolerant control algorithm is designed to achieve individual vehicle stability and string stability.Finally,the effectiveness of the proposed algorithm is verified by MATLAB simulation experi-ment.
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