Optimal Sitting and Sizing of Capacitor Using Iterative Search Method for Enhancement of Reliability of Distribution System

2018 ◽  
pp. 123-129 ◽  
Author(s):  
Vikas Singh Bhadoria ◽  
Nidhi Singh Pal ◽  
Vivek Shrivastava ◽  
Shiva Pujan Jaiswal
Keyword(s):  
Distribution System ◽  
Search Method ◽  
Iterative Search

A Study on Automatic Setting Method of Protective Device in Korean Distribution System using Graph Search Method

2020 ◽  
Vol 69 (12) ◽  
pp. 1873-1878
Author(s):  
Ji-Soo Kim ◽  
Chul-Hwan Kim ◽  
Bo-Kyung Ko ◽  
Jin-Sol Song ◽  
Ho-Young Choi ◽  
...  
Keyword(s):  
Distribution System ◽  
Search Method ◽  
Graph Search ◽  
Protective Device

scholarly journals Physics-Based Vehicle Simulation Using PD Servo

2019 ◽  
Vol 9 (22) ◽  
pp. 4949
Author(s):  
Daeun Kang ◽  
Jinuk Jeong ◽  
Seung-wook Ko ◽  
Taesoo Kwon ◽  
Yejin Kim
Keyword(s):  
Search Method ◽  
Curve Shape ◽  
Iterative Search ◽  
Vehicle Simulation ◽  
Simulation Calculation ◽  
Multiple Vehicles ◽  
Simulation Results ◽  
External Forces ◽  
The Given ◽  
Real Vehicle

In this paper, we introduce a novel system for physics-based vehicle simulation from input trajectory. The proposed system approximates the physical movements of a real vehicle using a proportional derivative (PD) servo which estimates proper torques for wheels and controls a vehicle’s acceleration based on the conditions of the given trajectory. To avoid expensive simulation calculation, the input trajectory is segmented and compared to the optimized trajectories stored in a path library. Based on the similarity of the curve shape between the input and simulated trajectories, an iterative search method is introduced to generate a physically derivable trajectory for convincing simulation results. For an interaction with other objects in the virtual environment, the surface of the vehicle is subdivided into several parts and deformed individually from external forces. As demonstrated in the experimental results, the proposed system can create diverse traffic scenes with multiple vehicles in a fully automated way.

scholarly journals Efficient Modulation Scheme for Intermediate Relay-Aided IoT Networks

2020 ◽  
Vol 10 (6) ◽  
pp. 2126 ◽  
Author(s):  
Waleed Shahjehan ◽  
Shahid Bashir ◽  
Saleem Latteef Mohammed ◽  
Ahmed Bashar Fakhri ◽  
Adeniyi Adebayo Isaiah ◽  
...  
Keyword(s):  
Bit Error Rate ◽  
Quadratic Assignment Problem ◽  
Cooperative Relaying ◽  
Search Method ◽  
Mobile Internet ◽  
Quadratic Assignment ◽  
Modulation Scheme ◽  
High Complexity ◽  
Iterative Search ◽  
Mapping Scheme

With the surge of ubiquitous demand for high-complexity and quality mobile Internet-of-things (IoT) services, new cooperative relaying paradigms have emerged. Motivated by the long and unpredictable end-to-end communication in relay-aided IoT networks, there is a need to introduce novel modulation schemes for very low bit error rate (BER) communications. In this paper, a practical modulation mapping scheme has been proposed to reduce decoding errors. Specifically, a hybrid automatic repeat request (HARQ) system has been used with an intermediate relay to transfer a message from a source to a destination. The design of modulation mapping has been optimized by first formulating the objective as the quadratic assignment problem. Later, the solution to the mapping problem is provided using an iterative search method. To validate the proposed solution, extensive simulations have been performed in MATLAB. The results show that the proposed solution outperforms the conventional relay retransmission and the heuristic design approaches.

Forward kinematics analysis of parallel mechanisms with restricted workspace

2014 ◽  
Vol 229 (14) ◽  
pp. 2561-2572 ◽  
Author(s):  
Mingchao Geng ◽  
Tieshi Zhao ◽  
Chang Wang ◽  
Yuhang Chen ◽  
Erwei Li
Keyword(s):  
Jacobian Matrix ◽  
Search Method ◽  
Degree Of Freedom ◽  
Forward Kinematics ◽  
Parallel Mechanisms ◽  
Kinematics Analysis ◽  
Iterative Search ◽  
Newton Raphson ◽  
Equivalent Method ◽  
Quasi Newton

The iterative search method (Newton-Raphson or Quasi-Newton) is an important numerical method for solving the forward kinematics problem of parallel mechanisms. But there may be a failure when the iterative search method solves the forward kinematics problems of a class of mechanisms, whose workspace is restricted. The extreme displacement singularity in the limbs is one reason for the workspace restriction. An equivalent method is proposed to remove the extremely displacement singularity in the limbs, and the forward kinematics solutions of two representative 6 degree of freedom mechanisms are given to illustrate the mechanism equivalence. For the coupled fewer degree of freedom mechanisms, the coupled motion is another reason for the workspace restriction. The virtual mechanism method and modified Jacobian matrix method are applied to solve the forward kinematics problems of this class of mechanisms. Numerical examples are given to validate the theories proposed above.

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