In the article “Trajectory Tracking Control for Mobile Robots Using Reinforcement Learning and PID” by Shuti Wang, Xunhe Yin, Peng Li, Mingzhi Zhang and Xin Wang (Iranian Journal of Science and Technology, Transactions of Electrical Engineering. https://doi.org/10.1007/s40998-019-00286-4), there is an error in page 5. The erratum is to correct this error.

Controlled and improved power quality is one of the fundamental and essential needs in any industry driven by electric power for optimal exploitation of resources. However, in power quality, some crucial problems have been recognized as harmonic distortion, interruption, sag, swell and transient. Out of these, sag and swell are predominantly seen and cause stern impact on the electrical devices or

One of the essential strategies for restricting fault areas and reducing the number of affected customers in each outage is the simultaneous use of distribution automation systems and distribution generations (DGs). The use of DGs in the distribution networks affects the problem of remote control switch (RCS) placement. This study presents a new and practical method to determine the optimal location

This paper presents a fault detection method for induction generators using an unscented Kalman filter. In some applications such as wind turbine energy conversion systems, the induction generators experience oscillations caused by wind speed variation; therefore, the fault detection method should be able to detect fault in the presence of these oscillations. On the other hand, the induction generator

The magnetic levitation system requires a finely tuned controller to suspend a ball in the air. Any imbalance in the force balance condition might result in high fluctuations causing the ball to fall out of levitation. A hybrid tuning strategy based on successful levitation and minimization of vibrations has been designed and tested in real time. The proportional–integral–derivative controller has

This paper suggests heat transfer search (HTS) algorithm for solving complicated combined heat and power economic dispatch (CHPED) problem. The valve point effect, prohibited operating zones of conventional thermal generators and transmission loss are taken into consideration. The main objective of the CHPED problem is to minimize the total fuel cost for producing electricity and heat supplying to

The escalating in load demand prioritized the incorporation of additional renewable energy generation plants to the existing grid. In parallel, the necessity of reactive power balance and damping characteristics has advised the incorporation of flexible AC transmission system controllers to the existing power network. Hereby, the modern power system has been driven towards the much more composite system

This paper presents a planar ultra-wide band (UWB) sensing antenna accompanied with a monopole narrow band communicating antenna for interweave cognitive radio (CR) applications. The UWB antenna bandwidth covers the entire band specified for UWB applications (3.1–10.6 GHz). In addition to the varactor diode, a PIN diode is attached to the communicating antenna to expand the continuous frequency tuning

Fragile watermarking is one of the integrity protection mechanisms of multimedia data like image, video, and audio. A secure fragile image watermarking scheme, which is used to detect modification or tampering occurred on the image content, is devised in this paper. The projected scheme is developed into two steps, i.e., computation of secure authentication code/watermark bit from some of the most

This paper proposed a new methodology based on nature-enthused meta-heuristic optimization algorithm named as whale optimization algorithm (WOA), which can significantly envisage problems for simultaneous allocation of distributed generation (DG) and Distribution STATic COMpensator (DSTATCOM) in the radial distribution systems (RDS). In the proposed method, optimal locations and sizing of the DG and

To address the issue of voltage instability in the stand-alone microgrid structure, the paper presents control algorithm of energy storage system that can support the microgrid network at the time of sudden variation in load. The incorporation of battery module into the microgrid network strengthens the overall structure as it features high energy density. A control strategy is devised that establishes

Android application development has attracted the attention of many software developers as a mainstream software platform. Despite its interesting characteristics, there are a number of issues that result in developing applications with poor performance. Hence, it is very crucial to evaluate quality of Android applications, specially their robustness and responsiveness. Monkey testing is a traditional

This paper develops a new management framework for optimal operation of the hybrid AC–DC microgrids incorporating renewable energy sources and storages. Hybrid microgrid consists of two parts of AC and DC to supply the AC and DC loads, respectively. The power exchange capability of hybrid microgrids between the AC and DC parts makes it possible to reduce the total microgrid costs, effectively. To make

In this paper, a compact multiband CPW-fed monopole antenna is proposed. The designed antenna has a simple structure, which consists of a rectangular radiating patch with two symmetrically structured meandered line slots on both sides and a CPW-fed 50 Ω microstrip line. The designed antenna occupies only 23 × 23 mm2 size on a FR-4 substrate sheet which makes it a good candidate for wireless mobile

In this paper, a robust fault diagnosis method is proposed to estimate the states and faults simultaneously for a special class of Lipschitz nonlinear systems. In the model of system, fault is considered as a linear and additive function and disturbance as a nonlinear function coupled with the system states. An augmented system is constructed by forming a vector composed of states and faults, and a

Person re-identification is to search for a correct match for a person of interest across different camera views among a large number of impostors. While the approaches based on RGB modality have been widely studied to re-identify people, other modalities could be exploited as additional information sources, like depth and skeleton modalities. In this paper, we perform multi- and single-modal person

In wireless mesh networks, during handoff process, the mobile client needs to authenticate with other nodes. It is necessary to ensure secure communication between the mobile client and mesh nodes. However, using the conventional public key infrastructure requires a large overhead of storage requirement, since it has to deal with the management of the public key certifications. In the present paper

The paper proposes a method for microgrid optimal scheduling with renewable energy sources considering islanding constraints. The main purpose of the paper is to reduce the total operating cost of microgrid which includes the purchased energy cost from main grid and total local resources generation cost in grid-connected mode, and generation cost of local generators and renewable sources in islanding

In this work, an improved interactive multiple model-based smoothing algorithm is proposed for tracking and interception of a maneuvering target. The smoothed states are obtained at some past scan (\(k-N\)), but the target interception happens at the current scan. This helps to obtain the real-time benefits of the smoothing. Fixed-lag smoothing interactive multiple model algorithm is employed to follow

An ad hoc network is a set of distributed nodes dispersed within a relatively limited area with wireless connections. Based on available paths, hierarchical algorithms divide the network into two levels of hierarchy. The main goal of this paper is to design an optimum allocation algorithm in the wireless networks using a fuzzy logic (FL) algorithm, namely fuzzy-hierarchical algorithm. FL is adopted