scholarly journals Intelligent drummer module based on beat-tracking

2021 ◽  
Vol 17 (1) ◽  
pp. 1-23
Author(s):  
Juan Camilo Gómez Villamil

Most of the beat-tracking research tends to work on the exploration of theoretical strategies and not on the development of automatic devices that can be functional in real musical environments. As a consequence of the above, there is a scarcity of electronic devices for musical backing based on the beat-tracking technique. So, we have developed an automatic musical backing device based on beat-tracking with the real-time operation.

2010 ◽  
Vol 143-144 ◽  
pp. 576-579 ◽  
Author(s):  
Shu Xian Zhu ◽  
Bang Fu Wang ◽  
Xue Li Zhu ◽  
Sheng Hui Guo

PLC dynamically adjusts power voltage by controlling switches of transformers with different combinations, which is based on the theory of 8421, and makes voltage changes in a very small range. By using this system, energy is saved, and the damage of illumination equipment from voltage instability is greatly reduced, and the life of lamps is effectively extended. Meanwhile, by using the touch screen, this system not only can realize the real time parameter display, but also achieve the real time operation on the panel.


Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 655
Author(s):  
Jürgen Marchgraber ◽  
Wolfgang Gawlik

Battery Energy Storage Systems (BESS) based on Li-Ion technology are considered to be one of the providers of services in the future power system. Although prices for Li-Ion batteries are falling continuously, it is still difficult to achieve profitability from a single service today. Multi-use operation of BESS in order to reach a so-called “value-stacking” of services therefore is a hotly debated topic in literature, since such an operation holds the potential to increase profitability dramatically. The multi-use operation of a BESS can be divided into two parts: the operational planning phase and the real-time operation. While the operational planning phase has been examined in many studies, there seems to be a lack of discussion for the real-time operation. This paper therefore tries to address the topic of the real-time operation in more detail. For this reason, this paper discusses concepts for implementing a real-time multi-use operation and introduces the novel concept of dynamic prioritization, which allows resolving conflicts of services. Besides the ability to cope with abnormal grid conditions, this concept also holds potential for a better utilization of resources during normal grid conditions. A mathematical framework is used to describe several services and their interaction, taking into account the concept of dynamic prioritization. Several applications are presented in order to demonstrate the behavior of the concept during normal and abnormal grid conditions. These applications are simulated in Matlab/Simulink for specific events and in the form of long-time simulations.


2021 ◽  
Author(s):  
Yu Fan ◽  
Jianhua Guo ◽  
Quan Cao ◽  
JingLun Ma ◽  
Jun Zhu ◽  
...  

Abstract Nowadays oil & gas industry is receiving a bulk of data than ever before from its onsite wells where may hundred miles away from operator's headquarter, which benefits us monitoring and analyzing those digital fortune in a data hub, saving a lot of expenditure and improving the efficiency compared to old-fashioned approach which requires senior engineers with rich experience working on wellsite. In this way, the oil & gas operators save money tremendously on human cost under the booming of drilling operations. While, could we do more to dig out further values from those data? Make our operations less dependable on limited resources, the senior drilling engineers, especially when the oil and gas industry face the chasm of human resources sustainability after the hit of downturn, also make the plain real-time data more intuitive and self-explanatory to the operation decision makers in an unprecedented way. What's more, could we make our drilling activities more visible and interactive? This paper is going to introduce using augmented reality technology to create an intuitive platform to integrate and present real-time operation parameters and data. Like any revolutionary method or technology, it could improve the industry efficiency in a non-negligible way, help us manage massive real-time data more effectively and efficiently. The 3D holographic projection presents dynamic models or systems based on the data stream and graphic algorithm, which evolves our industry from 2D world to 3D world, combining the reality environment with the digital world, creating a digital reflection of the real wellsite, bottom hole assembly (BHA), well trajectories, lithological layers, etc. Thanks to the visualization technologies and augmented reality, we can create a digital twin of physic world for those engineers, technicians, managers using holographic method to interact with, scale up and down, analyzing in a better awareness. In this paper, we will describe a digital drilling wellsite which is established on operator's Real Time Operation Center (RTOC)office to monitor and analyze live field operations, the operator could have an overview of their on-site operations, tracking the equipment performance, engineering parameters and downhole status to enhance the understanding and interaction with the on-going field operations. The wellbore trajectory model gives the team a superior knowledge by combining the engineering data or geological data. Not only help well placement in desired reservoir but also improve the anti-collision concept in direction drilling. This model is extreme meaningful when engineers need a discussion to optimize or change their drilling plan as it is 3D visible and able to interact with. We will continues digging out further more value of the real-time data collected from wellsite to educate us find the cost-saving ways which improve our performance and eliminate the complicated conditions that normally resulted in Non production time (NPT) event. For our oil & gas industry, we are just start to have a more adventure and prosperous journey in digitalizing transforming.


1987 ◽  
Vol 23 (7) ◽  
pp. 1376-1390 ◽  
Author(s):  
Aristidis P. Georgakakos ◽  
David H. Marks

Author(s):  
Zhaobin Hong ◽  
Chen Li

The real-time vibration suppression and composite adaptive control of coordinated motion for space flexible manipulator with an attitude-controlled base are studied. The dynamic equations of the system are developed by using the Lagrangian assumed modes methods. It is verified that the dynamic equation and Jacobi matrix of the system can be linearly dependent on a group of inertial parameters. Based on the results and with the augmentation approach, a composite adaptive control of space flexible manipulator to track the desired trajectory is developed. Considering the dynamics of flexible subsystem, a control scheme is presented to suppress the vibration during the real-time operation. In particular, it doesn’t require measuring the position, velocity nor acceleration of the base because of an effective exploitation of the particular property of the system dynamics. The numerical simulation is carried out, which confirms the controller proposed is feasible and effective.


Author(s):  
Gaetano Pecoraro ◽  
Antonio Pascucci ◽  
Enrico Maria Carlini ◽  
Matteo Contu ◽  
Marco Cortese ◽  
...  

Energies ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 3004 ◽  
Author(s):  
Fatima Zahra Harmouch ◽  
Ahmed F. Ebrahim ◽  
Mohammad Mahmoudian Esfahani ◽  
Nissrine Krami ◽  
Nabil Hmina ◽  
...  

The real-time operation of the energy management system (RT-EMS) is one of the vital functions of Microgrids (MG). In this context, the reliability and smooth operation should be maintained in real time regardless of load and generation variations and without losing the optimum operation cost. This paper presents a design and implementation of a RT-EMS based on Multiagent system (MAS) and the fast converging T-Cell algorithm to minimize the MG operational cost and maximize the real-time response in grid-connected MG. The RT-EMS has the main function to ensure the energy dispatch between the distributed generation (DG) units that consist in this work on a wind generator, solar energy, energy storage units, controllable loads and the main grid. A modular multi-agent platform is proposed to implement the RT-EMS. The MAS has features such as peer-to-peer communication capability, a fault-tolerance structure, and high flexibility, which make it convenient for MG context. Each component of the MG has its own managing agent. While, the MG optimizer (MGO) is the agent responsible for running the optimization and ensuring the seamless operation of the MG in real time, the MG supervisor (MGS) is the agent that intercepts sudden high load variations and computes the new optimum operating point. In addition, the proposed RT-EMS develops an integration of the MAS platform with the Data Distribution Service (DDS) as a middleware to communicate with the physical units. In this work, the proposed algorithm minimizes the cost function of the MG as well as maximizes the use of renewable energy generation; Then, it assigns the power reference to each DG of the MG. The total time delay of the optimization and the communication between the EMS components were reduced. To verify the performance of our proposed system, an experimental validation in a MG testbed were conducted. Results show the reliability and the effectiveness of the proposed multiagent based RT-EMS. Various scenarios were tested such as normal operation as well as sudden load variation. The optimum values were obtained faster in terms of computation time as compared to existing techniques. The latency from the proposed system was 43% faster than other heuristic or deterministic methods in the literature. This significant improvement makes this proposed system more competitive for RT applications.


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