Integration effects of UAVs in non-segregated airspace

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Tamer Savas ◽  
Oznur Usanmaz ◽  
Ozlem Sahin ◽  
Ertan Çınar ◽  
Murat Karaderili
Keyword(s):  
Real Time ◽  
Simulation Method ◽  
Flight Time ◽  
Flight Distance ◽  
Content Type ◽  
Time Simulation ◽  
Proposed Model ◽  
Comparison Results ◽  
Quantitative Results ◽  
Real Time Simulations

Purpose The study aims to design a new route model for unmanned aerial vehicles (UAVs) to integrate them into non-segregated airspace. Design/methodology/approach The proposed route model was assessed and validated through real-time simulations. Findings The comparison results of baseline and proposed route model show that a reduction of 38% and 41% in the total flight time and total flight distance were obtained in favour of the proposed model, respectively. Practical implications The proposed route model can be applied by airspace designers and UAV users to perform safe and efficient landing in non-segregated airspace. Originality/value In this study, a new proposed route model is constructed for UAVs. Quantitative results, using a real-time simulation method, are achieved in terms of flight distance and flight time.

The enhancement of the prescribed track for unmanned air vehicles

2020 ◽  
Vol 92 (10) ◽  
pp. 1469-1473
Author(s):  
Oznur Usanmaz ◽  
Murat Karaderili ◽  
Ozlem Sahin ◽  
Tamer Savaş
Keyword(s):  
Real Time ◽  
Traffic Control ◽  
Simulation Method ◽  
Flight Time ◽  
Flight Distance ◽  
Content Type ◽  
Real Time Simulation ◽  
Vehicle Simulation ◽  
Unmanned Air Vehicle ◽  
Time Simulation

Purpose Unmanned aerial vehicles (UAVs) are more affected by adverse wind conditions in especially landing. Therefore, they need to change the runway in use. In case of this change, to eliminate the uncertain maneuvers, there is a need for a special prescribed track. The purpose of this study is the construction of a prescribed track at a single runway to provide a facility to change the runway in use. Design/methodology/approach Two forms of prescribed tracks, as standard and alternate, were constructed for UAVs by taking into consideration the key parameters to design flight procedures. Both tracks were assessed in a real-time simulation method. Moreover, unmanned vehicle simulation was used for a validation process. Findings According to the real-time simulation results, 8.14 NM and 6.64 NM of flight distance and 5.43 min and 4.43 min of flight time for the standard and alternate prescribed tracks were found, respectively. The obtained results were in favor of the alternate prescribed track. Furthermore, the prescribed track was assessed and validated in both air traffic control and UAV simulations. The feedback of pilots and controllers was very positive for a prescribed track, as it provided them with foresight and time to take care in any situations. Practical implications The prescribed track in this paper may be applied by airspace designers and UAV users to perform safe and efficient landing in adverse wind conditions. Originality/value In this study, a prescribed track was constructed for UAVs. Quantitative results were achieved using a real-time simulation method in terms of flight distance and flight time. Additionally, validation of the prescribed track was achieved by unmanned air vehicle simulation.

scholarly journals An Evacuation Route Model of Crowd Based on Emotion and Geodesic

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Bangquan Liu ◽  
Zhen Liu ◽  
Dechao Sun ◽  
Chunyue Bi
Keyword(s):  
Real Time ◽  
Geometric Constraints ◽  
Crowd Density ◽  
Time Simulation ◽  
Critical Issues ◽  
Particle Hydrodynamics ◽  
Crowd Evacuation ◽  
Dense Crowd ◽  
Evacuation Route ◽  
Real Time Simulations

Making unconventional emergent plan for dense crowd is one of the critical issues of evacuation simulations. In order to make the behavior of crowd more believable, we present a real-time evacuation route approach based on emotion and geodesic under the influence of individual emotion and multi-hazard circumstances. The proposed emotion model can reflect the dynamic process of individual in group on three factors: individual emotion, perilous field, and crowd emotion. Specifically, we first convert the evacuation scene to Delaunay triangulation representations. Then, we use the optimization-driven geodesic approach to calculate the best evacuation path with user-specified geometric constraints, such as crowd density, obstacle information, and perilous field. Finally, the Smooth Particle Hydrodynamics method is used for local avoidance of collisions with nearby agents in real-time simulation. Extensive experimental results show that our algorithm is efficient and well suited for real-time simulations of crowd evacuation.

An assessment of flight efficiency based on the point merge system at metroplex airports

2018 ◽  
Vol 90 (1) ◽  
pp. 1-10
Author(s):  
Ozlem Sahin ◽  
Oznur Usanmaz ◽  
Enis T. Turgut
Keyword(s):  
Fuel Consumption ◽  
Empirical Model ◽  
Service Providers ◽  
Control Area ◽  
Flight Time ◽  
Flight Distance ◽  
Data Set ◽  
Content Type ◽  
International Airport ◽  
Entry Points

Purpose Metroplex is a system of two or more airports, in physical proximity, with highly interdependent arrival and departure operations. The purpose of this study is the construction of an efficient and effective air route model based on the point merge system (PMS) to reduce aircraft fuel consumption and CO2 emissions for three metroplex airports in Istanbul terminal control area (TMA). Design/methodology/approach A PMS arrival route model is constructed for metroplex airports. In the proposed model, two situations are taken into consideration: for delay which can be defined as flying on sequencing legs (PMSdel) and for no delay (PMSno del). An empirical model is developed using a data set including the flight data records of ten actual B737-800 domestic flights. With this empirical model, both the baseline and the PMS models (PMSdel and PMSno del) are compared in terms of fuel consumption, CO2 emissions and flight distance and time as a theoretical computation. Findings In the proposed PMSno del arrival route model, according to different entry points for Istanbul Ataturk International Airport (LTBA), the analyses show an average reduction of 26 per cent in flight time, 24.5 per cent in flight distance, 17 per cent in fuel burned and CO2 emissions; in addition, for Sabiha Gökcen International Airport (LTFJ) there are 34, 23 and 32 per cent average savings for flight time, flight distance and fuel burned together with CO2 emissions obtained, respectively. Even if the PMSdel model, for LTFJ except only one entry point, for LTBA except two entry points, better results are obtained than baseline. Practical implications The point merge model for metroplex airports in this paper can be applied by airspace designers and Air Navigation Service Providers to perform efficient and effective arrival routes. Originality/value In this study, a point merge model is constructed for metroplex airports. Quantitative results, using an empirical model, are achieved in terms of fuel consumption, CO2 emissions and flight distance and time at metroplex airports.

Control-oriented modeling and real-time simulation method for a dual-mode scramjet combustor

2018 ◽  
Vol 153 ◽  
pp. 82-94 ◽  
Author(s):  
Jicheng Ma ◽  
Juntao Chang ◽  
Junlong Zhang ◽  
Wen Bao ◽  
Daren Yu
Keyword(s):  
Real Time ◽  
Simulation Method ◽  
Dual Mode ◽  
Real Time Simulation ◽  
Scramjet Combustor ◽  
Time Simulation

Modelling the relationship between population density and air quality using fractional Hausdorff grey multivariate model

Kybernetes ◽  
2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Kaihe Shi ◽  
Lifeng Wu
Keyword(s):  
Air Quality ◽  
Population Density ◽  
Composite Index ◽  
Original Data ◽  
Multivariate Model ◽  
Grey Model ◽  
Content Type ◽  
New Information ◽  
Proposed Model ◽  
Comparison Results

Purpose The proposed model can emphasize the priority of new information and can extract messages from the first pair of original data. The comparison results show that the proposed model can improve the traditional grey model. Design/methodology/approach The grey multivariate model with fractional Hausdorff derivative is firstly put forward to enhance the forecasting accuracy of traditional grey model. Findings The proposed model is used to predict the air quality composite index (AQCI) in ten cities respectively. Originality/value The effect of population density on AQCI in cities with poor air quality is not as significant as that of the cities with better air quality.

The Research on Real-Time Simulation of Wavers Based Parallel DSP System

2013 ◽  
Vol 373-375 ◽  
pp. 2175-2179
Author(s):  
Ying Li ◽  
Jing Qiu
Keyword(s):  
Real Time ◽  
Simulation Method ◽  
Ocean Wave ◽  
Practical Significance ◽  
Real Time Simulation ◽  
Wave Simulation ◽  
Time Simulation ◽  
Dsp System ◽  
Low Efficiency ◽  
The Waves

3D ocean wave simulation has long been hot issues in the field of computer graphics and real-time simulation and has practical significance in many areas of society. Complexity and randomness of the waves led to large areas of ocean wave simulation calculation exists for compute-intensive, low efficiency, memory requirements and other limitations. In response to the phenomenon of a decline in real-time with the fidelity lifting, this paper proposes a parallel simulation method, in which the wave data is calculated by each DSP and the results will be stitched as large ocean area. Experimental results show that the multi-DSP parallel processing method can satisfy the feeling of reality and real-time requirements of the waves at the same time, which will improve the system real-time performance without loss the wave details.

scholarly journals High Flexibility Hybrid Architecture Real-Time Simulation Platform Based on Field-Programmable Gate Array (FPGA)

Energies ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 6041
Author(s):  
Ruyun Cheng ◽  
Li Yao ◽  
Xinyang Yan ◽  
Bingda Zhang ◽  
Zhao Jin
Keyword(s):  
Real Time ◽  
Simulation Method ◽  
Hybrid Architecture ◽  
Simulation Platform ◽  
Real Time Simulation ◽  
Interactive Operation ◽  
Time Simulation ◽  
Simulation Step ◽  
High Flexibility ◽  
Network Simulation Method

With the expansion of system scale and the reduction in simulation step size, the design of a power system real-time simulation platform faces many difficulties. The interactive operation of real-time simulation presents the characteristics of phased and centralized. This paper proposes selecting the appropriate simulation method for each sub-network according to the system operation requirements, and the sub-network simulation method can be changed with the change in system operation requirements in the simulation process. In order to change the sub-network simulation method in the simulation process, a high flexibility hybrid architecture real-time simulation platform based on FPGA was designed. The main body of the architecture runs in the high control mode of instruction flow and uses instruction flexibility to realize the requirement of changing methods. The algorithm modularity architecture is used as an auxiliary architecture to reduce the instruction cost and increase the computing power. Finally, the hybrid architecture real-time simulation platform was implemented in the Xilinx VC709 board (Xilinx corporation, San Jose, CA, USA), and the verification results show that under the same system scale, the hybrid architecture simulation platform combined with simulation method changing realizes shorter simulation step and complex interactive operation.

Sign in / Sign up

Export Citation Format

Share Document