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Multilevel current source converter (MCSC) is an effective way to increase the power rating of conventional current source-fed motor drive, especially its current rating. However, there are still several challenges existing in this configuration, which mainly focus on its modulation and control techniques, and the inherent DC current imbalance issue. In this paper, a model predictive control (MPC)...
Nowadays, the control systems based on communication networks are used various industries such as manufacturing, automotive, aerospace, power generation and distribution, with many advantages and a couple of disadvantages. The latter can seriously affect the performances and the stability of each control system in the network and of the complex system as a whole. Moreover, it is well known that packet...
This paper proposes a decoupled power control algorithm for grid integration of photovoltaic (PV) systems using quasi-Z-source inverter (qZSI). The proposed controller uses model predictive control (MPC) framework to inject the maximum available power harvested from the PV panels to the grid and also to compensate reactive power required by the grid. Thus, a power electronics interface (PEI) is proposed...
A model predictive control method for a bi-directional DC/DC converter with feedback correction is presented. This method can improve the ability of energy storage system to maintain the stability of the DC voltage, and the converter inductor current track the given fast. The bus voltage overshoot is inhibited. The response speed of storage system to the power fluctuation of DC microgrid is enhanced...
This paper presents a model predictive control of a resonant inverter with LLC load configuration. The targeted application is an induction furnace. The proposed control requires neither phase-locked loop control nor PI tuning since the LLC load model is used to predict future current values for the load. An objective function is formulated such that a proper operating frequency reflecting the targeted...
The three-phase direct matrix converter has been researched exclusively as a direct AC/AC converter, being a competitive alternative to the conventional AC/DC/AC converter. Other possibilities of the matrix converter such as AC/DC, DC/AC and DC/DC conversion still remain unexplored. This paper firstly explores these possibilities and puts forward a concept of the versatile converter. With one matrix...
This paper presents a new and simple voltage control strategy for three phase current source inverter (CSI) using finite-set model predictive control. The proposed method can ensure an interruptible power supply (UPS) for the local loads of an islanded grid connected CSI independently of the type of these loads. The control of the inverter's output voltages is performed using the discrete model prediction...
This paper present a MPC based yaw rate control frame for active front steering vehicle. Firstly, by establishing the yaw rate ideal model, the reference value of the yaw rate of the vehicle is obtained. And the reference yaw rate is constrained by tyre-road friction coefficient and vehicle speed. Then the MPC controller is designed by minimizing the rate of change of the control action and deviation...
This paper incorporates sampling-based global path planning with model predictive image-based visual servoing (IBVS) for quadrotor unmanned aerial vehicles (UAVs) equipped with a fixed camera. The proposed method produces safe control inputs of quadrotor in obstacle environment by taking image feature kinematics into account. Firstly, we utilize a sampling-based algorithm for optimal path planning,...
Simulation of the traffic flow is an effective approach to resolve the traffic congestion problem and expect to elucidate the traffic congestion mechanism. In this paper, we propose a traffic flow model based on the MLD (Mixed Logical Dynamical) system approach which regard the lane change and overtaking behavior. The research revealed that traffic jam spreads from driving lane to overtake lane.
The understanding of the pedestrian behavior in the crowed is important for the assessment of urban layout and various approaches are reported for evaluating the safety of the social infrastructures. In this paper, a simulation model of pedestrian flow is proposed based on Mixed Logical Dynamical (MLD) system approach, and further a calculation algorithm for the direction change of avoidance region...
Under the large-scale penetration of photovoltaic generation systems, the temperature constraints of transmission lines play a key role in the flexible operation of the power grid. In this paper, simplified line temperature constraints are derived from its physical model, and the strength and limitation of the simplified models are investigated. The features of the proposed models are further discussed...
When leg/wheel mobile robots are controlled by model predictive control (MPC), the optimization is too complex for an embedded CPU. Then, we proposed a method which reduces computational complexity by sequential optimization for the models partitioned into each leg. However, robustness of the proposed method was not evaluated enough in the disturbing environment. In this paper, we conduct simulations...
Aiming at the issues of random delay and delay uncertainty in both the before channel and feedback channel for network control system, the root causes of random delay influence closed-loop control system by case is analysis, and the predictive control method based on neural network to solve the feasibility of existence network random delay in control system closed-loop control has provided. Simulation...
Low switching frequency operation is one of the most effective methods to reduce the switch losses in high-power industrial machine drives. However, a low switching frequency would affect the operation performance, e.g., harmonic distortion in the stator current, modulation delay and so on. With an electrically excited synchronous machine (EESM) being taken as the high-power drive load of a two-level...
This paper compares two torque control methodologies, namely Field Oriented and Model Predictive ones, for monitoring Interior Permanent Magnet Motor (IPMM) over a wide speed range. IPMM magnetic saturation and cross coupling effects are taken into consideration, increasing significantly the precision of the developed controllers. Maximum Torque per Ampere (MTPA) and Field Weakening (FW) operating...
As it is well-known, one of the main problems when dealing with fusion reactors is the plasma instability. The UPV/EHU Stellarator has been constructed to serve as a plasma control testbed so that the plasma behavior within the vacuum chamber may be studied for different real-time control laws. While in most of the large facilities the system control is performed by traditional control laws, the process...
For some big cities where congestion occurs frequently, this paper proposes a novel predictive congestion control algorithm, focusing on imposing hard constraints on links for avoiding congestion. Traditionally the urban traffic network is often optimized with some micro-integrated global performance indexes, which equalize the effect of congestion and the emergency of congestion may be ignored. However,...
The technique of post-combustion CO2 capture is one of the most direct and effective means of reducing CO2 emissions from coal-fired power plants. However, owing to the complex behavior of CO2 capture system, such as large inertia, strong coupling among multi-variables, and strict constraints, the conventional PID controllers cannot meet the flexible operation requirement. For this reason, this paper...
In this paper, angular velocity control of permanent magnet dc motor is addressed by using an output feedback discrete-time model predictive control (MPC) algorithm. The operational constraints are imposed on the control input. The control system is designed based on a topology of the dc-dc buck power converter-dc motor system in the presence of unknown, exogenous, time-varying load torque disturbances...
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