scholarly journals Thrust Vectoring/Reversing Tactics in Air-to-Air Combat

1992 ◽  
Author(s):  
C. W. Boppe ◽  
R. P. Martorella
Keyword(s):  
Digital Simulation ◽  
Solution Process ◽  
Considerable Effort ◽  
Thrust Vectoring ◽  
Engine Thrust ◽  
Study Results ◽  
Combat Effectiveness ◽  
Flight Envelope ◽  
Air Combat ◽  
F 14

Considerable effort is now underway to develop technologies for enhancing fighter maneuvering limits. This has in part been motivated by the capabilities of advanced air-to-air missiles. One approach to enhanced combat effectiveness involves flight envelope expansion and improved controllability via engine thrust-vectoring and thrust-reversing. The complexity of fighter combat, however, makes it difficult to perform engineering analyses for assessing potential technological enhancements and risks. This paper describes a digital simulation that has been used to identify benefits associated with improved maneuverability. The Navy/Grumman F-14 aircraft provides the flight characteristics database. Combat tactics are developed as part of the solution process and are based solely on characteristics of the combatants and weapons employed. Head-on and co-directional neutral start combat engagements are used to illustrate study results.

Thrust Vectoring/Reversing Tactics in Air-to-Air Combat

1994 ◽  
Vol 116 (1) ◽  
pp. 124-132 ◽  
Author(s):  
C. W. Boppe ◽  
R. P. Martorella
Keyword(s):  
Digital Simulation ◽  
Solution Process ◽  
Considerable Effort ◽  
Thrust Vectoring ◽  
Engine Thrust ◽  
Study Results ◽  
Combat Effectiveness ◽  
Flight Envelope ◽  
Air Combat ◽  
F 14

Considerable effort is now under way to develop technologies for enhancing fighter maneuvering limits. This has in part been motivated by the capabilities of advanced air-to-air missiles. One approach to enhanced combat effectiveness involves flight envelope expansion and improved controllability via engine thrust-vectoring and thrust-reversing. The complexity of fighter combat, however, makes it difficult to perform engineering analyses for assessing potential technological enhancements and risks. This paper describes a digital simulation that has been used to identify benefits associated with improved maneuverability. The Navy/Grumman F-14 aircraft provides the flight characteristics database. Combat tactics are developed as part of the solution process and are based solely on characteristics of the combatants and weapons employed. Head-on and codirectional neutral start combat engagements are used to illustrate study results.

The Mechanical Characteristics Study on an Interconnected Anti-Rolling Suspension System

2013 ◽  
Vol 791-793 ◽  
pp. 676-680
Author(s):  
You Shan Hou ◽  
Hui Xin Song ◽  
Chao Wang
Keyword(s):  
Mechanical Characteristics ◽  
Digital Simulation ◽  
Rolling Resistance ◽  
Simulation Method ◽  
Suspension System ◽  
Heavy Duty ◽  
Nonlinear Mathematical Models ◽  
Critical Technology ◽  
Study Results ◽  
Heavy Duty Vehicles

The heavy-duty special vehicles easily roll during steering, anti-rolling technology becomes a critical technology to the heavy-duty vehicles. Aiming at the rolling problem of a full load heavy vehicle in the process of steering, an interconnected anti-rolling suspension system with adjustable damping was designed, the nonlinear mathematical models of both hydro-pneumatic independent suspension and interconnected anti-rolling suspension system were established. The mechanical characteristics of two kind of suspension were studied through digital simulation method, discussing the system parameter changes affection on the performance of interconnected anti-rolling suspension system. The study results indicate that the interconnected anti-rolling suspension system bitterly improves vehicles rolling resistance in contrast to the oil-gas mixed independent suspension, the study results provide theoretical basis for the anti-rolling s design of heavy-duty vehicles.

A Novel Mini Jet Engine Powered Unmanned Aerial Vehicle: Modeling and Control

2021 ◽  
pp. 1-13
Author(s):  
Erdinç Altuğ ◽  
Abdullah Türkmen
Keyword(s):  
Jet Engines ◽  
Flight Duration ◽  
Thrust Vectoring ◽  
Jet Engine ◽  
Modeling And Control ◽  
Engine Thrust ◽  
Heavy Lift ◽  
Aerial Vehicle ◽  
Thrust System ◽  
And Control

Significant progress has been made in recent years on personal air vehicles (PAVs), which offer independent and autonomous urban transportation. On-demand parcel delivery drones and heavy-lift drones are gaining serious attention. Although various designs for these systems have been put forward, they still have not reached sufficient maturity. The current systems provide somehow satisfactory operation, but many of these systems are limited in payload capacity and flight duration, and not suitable for future operations. In this paper, we propose a novel thrust system that uses multiple mini jet engines. Unlike electric motors, the jet engine thrust cannot vary rapidly. This led us to design and develop a thrust vectoring system for each jet engine. This proposed system has the potential to enable drones to carry more payload and achieve longer flight times. This paper discusses the design and modeling of the system as well as the stabilization algorithms that satisfactorily stabilize the proposed system. We presented that due to motor lag, thrust variations cannot stabilize the vehicle. We showed that the use of a thrust vectoring mechanism with LQR-based controller can overcome the effects of motor lag and stabilize the vehicle, successfully.

An Air Combat Effectiveness Study (ACES) Program

1977 ◽  
Vol 21 (5) ◽  
pp. 431-434
Author(s):  
Edward W. Youngling ◽  
Sheldon H. Levine ◽  
John B. Mocharnuk ◽  
Louise M. Weston
Keyword(s):  
World War Ii ◽  
Pilot Training ◽  
Effectiveness Study ◽  
World War ◽  
Program Selection ◽  
Management Procedures ◽  
Combat Effectiveness ◽  
Air Combat ◽  
Selection Test ◽  
Selection Research

History has demonstrated that there is a pressing need for improved selection, training, and management procedures for fighter pilots. In World War II, only one in twenty pilots became an ace. The U.S. Air Force kill ratio in Southeast Asia was approximately 2.5 to 1. In contrast, the Israelis claim to have a kill ratio of 60 to 1. This feasibility study focuses upon enhancing our record of air-to-air combat kills through more stringent and comprehensive selection procedures. Specifically, empirical evidence is presented which demonstrates that a program can be developed to select pilots who will be effective in air-to-air combat. From reviews of U.S. and foreign selection research dating from World War II to the present and an assessment of pilot opinion from hundreds of aces, 45 factors were identified as potential predictors of combat effectiveness. Of these 45 factors, only 10 are adequately evaluated within current military selection programs upon entrance into pilot training. Assessment of the remaining 35 untapped factors is within our technological reach. In fact, many of these factors can be assessed by tests which are presently available. An Air Combat Effectiveness Study (ACES) program is recommended which would provide selection test measures for virtually all of the factors identified as underlying combat effectiveness. As part of the ACES program, selection test measures would be correlated with performance in air combat maneuvering ranges, thereby providing a method for selecting fighter pilots during peacetime. Armed with these selection test scores and an effectively executed validation program, researchers will, for the first time in history, be able to specify a definitive profile of the ace fighter pilot.

scholarly journals An operational effectiveness evaluation method of the swarming UAVs air combat system

2019 ◽  
Vol 277 ◽  
pp. 02010
Author(s):  
Niping Jia ◽  
Zhiwei Yang ◽  
Kewei Yang
Keyword(s):  
Information Entropy ◽  
Evaluation Method ◽  
Effectiveness Evaluation ◽  
Operational Effectiveness ◽  
Combat Effectiveness ◽  
Air Combat ◽  
Operational Information ◽  
Node Attributes ◽  
System Assessment

In this paper, we propose an operational effectiveness evaluation method of the swarming UAVs air combat system. The system network model is firstly established before the evaluation. We divide the edges in the network into nine types according to the Generalized Operation Loop and give the edge attribute of operational information entropy based on node attributes. When calculating the system operational effectiveness, we focus on the striking ability and propose the concept of Operation Loop Capability to represent the target-attack effectiveness of a certain operational loop, which can be calculated from the edge operational information entropies. We can get the combat effectiveness to a certain target from the Operation Loop Capability, and the combat effectiveness of the swarming UAVs air combat system is represented by the sum of the striking capabilities to all targets. Finally, the scene of swarming UAVs air combat is taken as a case study to apply and verify our evaluation method. This paper gives a quantitative perspective on swarming UAVs combat system assessment and can help to analyze the contribution of UAVs and other weapons in the system.

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