An approximation time optimal control approach for DC-DC buck converter

2021 ◽  
Vol 20 (3) ◽  
pp. 290
Author(s):  
Zhigui Liu ◽  
Yonghui Chen ◽  
Keqiang Bai
Keyword(s):  
Optimal Control ◽  
Buck Converter ◽  
Time Optimal Control ◽  
Control Approach ◽  
Time Optimal ◽  
Optimal Control Approach

scholarly journals Performance of a Nonlinear Real-Time Optimal Control System for HEVs/PHEVs during Car Following

2014 ◽  
Vol 2014 ◽  
pp. 1-14 ◽  
Author(s):  
Kaijiang Yu ◽  
Junqi Yang
Keyword(s):  
Optimal Control ◽  
Real Time ◽  
Electric Vehicles ◽  
Hybrid Electric Vehicles ◽  
Time Optimal Control ◽  
Management Problem ◽  
Control Approach ◽  
Car Following ◽  
Time Optimal ◽  
Optimal Control Approach

This paper presents a real-time optimal control approach for the energy management problem of hybrid electric vehicles (HEVs) and plug-in hybrid electric vehicles (PHEVs) with slope information during car following. The new features of this study are as follows. First, the proposed method can optimize the engine operating points and the driving profile simultaneously. Second, the proposed method gives the freedom of vehicle spacing between the preceding vehicle and the host vehicle. Third, using the HEV/PHEV property, the desired battery state of charge is designed according to the road slopes for better recuperation of free braking energy. Fourth, all of the vehicle operating modes engine charge, electric vehicle, motor assist and electric continuously variable transmission, and regenerative braking, can be realized using the proposed real-time optimal control approach. Computer simulation results are shown among the nonlinear real-time optimal control approach and the ADVISOR rule-based approach. The conclusion is that the nonlinear real-time optimal control approach is effective for the energy management problem of the HEV/PHEV system during car following.

scholarly journals Single-Switching Reachable Operation Points in a DC-DC Buck Converter: An Approximation from Time Optimal Control

Micromachines ◽  
2020 ◽  
Vol 11 (9) ◽  
pp. 834
Author(s):  
Ilya Dikariev ◽  
Fabiola Angulo ◽  
David Angulo-Garcia
Keyword(s):  
Optimal Control ◽  
Load Resistance ◽  
Buck Converter ◽  
Time Optimal Control ◽  
Optimal Time ◽  
Oscillatory Regime ◽  
Analytic Expressions ◽  
Time Optimal ◽  
Switching Action ◽  
Time Optimal Control Problem

In this paper, we study the time optimal control problem in a DC-DC buck converter in the underdamped oscillatory regime. In particular, we derive analytic expressions for the admissible regions in the state space, satisfying the condition that every point within the region is reachable in optimal time with a single switching action. We then make use of the general result to establish the minimum and maximum variation allowed to the load in two predefined design set-ups that fulfills the time optimal single switching criteria. Finally, we make use of numerical simulations to show the performance of the proposed control under changes in the reference voltage and load resistance.

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