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A Bidirectional Single-Stage DC/AC Converter for Grid Connected Energy Storage Systems
Jianliang Chen,Xiaozhong Liao,Deshang Sha 전력전자학회 2015 JOURNAL OF POWER ELECTRONICS Vol.15 No.4
In this paper, a unified control strategy using the current space vector modulation (CSVM) technique is proposed and applied to a bidirectional three-phase DC/AC converter. The operation of the converter changes with the direction of the power flow. In the charging mode, it works as a buck type rectifier; and during the discharging mode, it operates as a boost type inverter, which makes it suitable as an interface between high voltage AC grids and low voltage energy storage devices. This topology has the following advantages: high conversion efficiency, high power factor at the grid side, tight control of the charging current and fast transition between the charging and discharging modes. The operating principle of the mode analysis, the gate signal generation, the general control strategy and the transition from a constant current (CC) to a constant voltage (CV) in the charging mode are discussed. The proposed control strategy has been validated by simulations and experimental results obtained with a 1kW laboratory prototype using supercapacitors as an energy storage device.
The Analysis of Agricultural Output in Port SD Province Based on System Dynamics
Jianliang Liu,Junhai Ma,Yi Tian 보안공학연구지원센터 2015 International Journal of u- and e- Service, Scienc Vol.8 No.9
In order to know various factors affecting agricultural development in Shandong Province, this paper uses system dynamics model, modeling on agricultural output system in Shandong Province .It analyses how population growth, household consumption, the existing agricultural resources as well as GDP of Shandong Province affect the agricultural output, and uses Vensim software to make algorithm implemented. It analyses the effects of changed factors on agricultural output, and helps for government to make the agricultural development policy.
Lu Jianliang,고정훈 한국상품문화디자인학회 2023 상품문화디자인학연구 Vol.74 No.-
The automobile is a very large and complex product, made up of many subsystems and components. Among them, the dashboard is the core work information display area of the car, is an important interface of human-vehicle interaction. When driving, the dashboard not only shows the most important information of the car to the driver, but also guides the driver's driving operation. It is the record of the state of the car and the expression of the user's will to use. Some studies have found that driving emotion has become one of the important reasons for road traffic accidents. This paper takes the dashboard as the research object, on the basis of previous theoretical studies, takes the emotional effect of users as the research focus, and launches the design research of automobile dashboard based on interactive experience emotion. Firstly, based on the literature research method, the theory of emotional experience is combed and summarized. Secondly, the comparative research method is used to select the top 10 American brands in terms of sales share in 2022 and conduct a comparative study on the dashboard interfaces of popular models of these 10 brands. Then, from the perspective of user experience, with user emotions as the center, the paper analyzes the four parts of the interactive interface of automobile dashboard, including graphics, text, color and page layout, and summarizes the impact of interactive interface information on user experience. This paper attempts to study the impact of dashboard interactive interface on drivers' emotions, so as to provide emotional value for users and increase the satisfaction of user experience. Finally, based on the information elements that can be designed for the dashboard interface, some design suggestions are proposed from the perspective of user emotional intervention.
A Bidirectional Single-Stage DC/AC Converter for Grid Connected Energy Storage Systems
Chen, Jianliang,Liao, Xiaozhong,Sha, Deshang The Korean Institute of Power Electronics 2015 JOURNAL OF POWER ELECTRONICS Vol.15 No.4
In this paper, a unified control strategy using the current space vector modulation (CSVM) technique is proposed and applied to a bidirectional three-phase DC/AC converter. The operation of the converter changes with the direction of the power flow. In the charging mode, it works as a buck type rectifier; and during the discharging mode, it operates as a boost type inverter, which makes it suitable as an interface between high voltage AC grids and low voltage energy storage devices. This topology has the following advantages: high conversion efficiency, high power factor at the grid side, tight control of the charging current and fast transition between the charging and discharging modes. The operating principle of the mode analysis, the gate signal generation, the general control strategy and the transition from a constant current (CC) to a constant voltage (CV) in the charging mode are discussed. The proposed control strategy has been validated by simulations and experimental results obtained with a 1kW laboratory prototype using supercapacitors as an energy storage device.
Discrete-Time Adaptive Iterative Learning Control with Unknown Control Directions
Miao Yu,Jianliang Zhang,Donglian Qi 제어·로봇·시스템학회 2012 International Journal of Control, Automation, and Vol.10 No.6
An adaptive iterative learning control scheme is proposed for a class of discrete-time nonlinear systems with random initial conditions and iteration-varying desired trajectories. The discrete Nussbaum gain method is incorporated into the control design to tackle the problem associated with the lack of a priori knowledge of the control directions. The proposed control algorithm guarantees the boundedness of all the signals in the controlled system. The tracking error converges to zero asymptotically along the iterative learning axis. The effectiveness of the proposed control law is veri-fied through numerical simulation.
Tianqi Zhu,Jianliang Mao,Chuanlin Zhang,Linyan Han 제어·로봇·시스템학회 2024 International Journal of Control, Automation, and Vol.22 No.1
This paper presents a novel image-based visual servoing (IBVS) controller for a six-degree-of-freedom (6-DoF) robot manipulator by employing a fuzzy adaptive model predictive control (FAMPC) approach. The control strategy allows the robot to track the desired feature points adaptively and fulfill kinematic constraints appearing in a vision-guided task with different initial Cartesian poses. To this aim, the successive linearization method is firstly employed to transform the nonlinear IBVS model to the linear time-invariant (LTI) one at each sampling instant. The nonlinear optimization problem is therefore degraded into a convex quadratic programming (QP) problem. Subsequently, a fuzzy logic is exploited to tune the weighting coefficients in the cost function on the basis of image pixels changes at each step, endowing the reliable adaptation capabilities to different working environments. Experimental comparison tests performed on a 6-DoF robot manipulator with an eye-in-hand configuration are provided to demonstrate the efficacy of the proposed controller.