http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Xianku Zhang,Guoqing Zhang 제어·로봇·시스템학회 2016 International Journal of Control, Automation, and Vol.14 No.4
This study is concerned with robust adaptive fuzzy stabilization of the nonlinearly parameterized andperiodically time-varying system with known period of the parameterized disturbance. In this note, a novel uncertaintydelivering approach is developed to overcome the problems: “the initial evident oscillating error”, “explosionof complexity” and “curse of dimensionality” from the root causes that are common in the current literatures onapproximation-based algorithms. Furthermore, a novel adaptive fuzzy control scheme is proposed with advantagesof concise structure and easy-to-implementation in practical engineering. Only one fuzzy type approximator isintroduced to compensate uncertainties of the whole system in the scheme. Based on small gain theory, all signalsof the composite closed-loop system are guaranteed to be uniformly ultimately bounded. Finally, three simulationexperiments are presented to demonstrate the effectiveness of our results.
Controller Design for MIMO System with Time Delay Using Closed-loop Gain Shaping Algorithm
Zhiheng Zhang,Xianku Zhang 제어·로봇·시스템학회 2019 International Journal of Control, Automation, and Vol.17 No.6
In this paper, a general scheme is proposed for Multi Input Multi Output (MIMO) systems with time delays by using closed-loop gain shaping algorithm (CGSA). The controller is designed based on the minimum phase(MP) part of these processes. For every closed loop, there is the unique variable parameter, the performance and robustness can be tuned quantitatively to satisfy the practical requirements of project. Finally, three examples in published literatures are performed to illustrate the effectiveness of proposed method. Compared with the relative references, the control performances of proposed method are superior to those of existed research, and the control scheme is with advantages of concision and efficiency.
Qiang Zhang,Xianku Zhang,임남균 대한조선학회 2017 International Journal of Naval Architecture and Oc Vol.9 No.5
Course keeping is hard to implement under the condition of the propeller stopping or reversing at slow speed for berthing due to the ship's dynamic motion becoming highly nonlinear. To solve this problem, a practical Maneuvering Modeling Group (MMG) ship mathematic model with propeller reversing transverse forces and low speed correction is first discussed to be applied for the right-handed single-screw ship. Secondly, a novel PID-based nonlinear feedback algorithm driven by bipolar sigmoid function is proposed. The PID parameters are determined by a closed-loop gain shaping algorithm directly, while the closed-loop gain shaping theory was employed for effects analysis of this algorithm. Finally, simulation experiments were carried out on an LPG ship. It is shown that the energy consumption and the smoothness performance of the nonlinear feedback control are reduced by 4.2% and 14.6% with satisfactory control effects; the proposed algorithm has the advantages of robustness, energy saving and safety in berthing practice.