Latency and Its Effects on the Fidelity of Air-to-Air Missile T & E Using Advanced Distributed Simulations PDF Download
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Languages : en
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The Linked Simulators Phase (LSP) of the Systems Integration Test (SIT) was executed by the Joint Advanced Distributed Simulation (JADS) Joint Test Force (JTF) and the Naval Air Warfare Center, Weapons Division (NAWCWPNS) between August and November 1996. The purpose of the SIT is to evaluate the utility of using advanced distributed simulations (ADS) to support cost-effective testing of an integrated missile weapon/launch aircraft system in an operationally realistic scenario. The SIT missions simulate a single shooter aircraft launching an air-to-air missile against a single target aircraft. In the LSP, the shooter, target, and missile were all represented by simulation laboratories. ADS techniques were used to link NAWCWPNS manned flight laboratories representing the aircraft to an air-to-air missile hardware-in-the-loop (HWIL) laboratory representing the missile. In order for this linking to have utility for the T & E of the AIM-9M missile under test the latency of the data exchanged between the laboratories must be sufficiently low and well-behaved so as not to adversely affect the fidelity of the missile laboratory performance. This paper presents the results of the evaluation of latency and its effects on LSP results. Conclusions for T & E applications of the LSP ADS configuration are also given.
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Languages : en
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The Linked Simulators Phase (LSP) of the Systems Integration Test (SIT) was executed by the Joint Advanced Distributed Simulation (JADS) Joint Test Force (JTF) and the Naval Air Warfare Center, Weapons Division (NAWCWPNS) between August and November 1996. The purpose of the SIT is to evaluate the utility of using advanced distributed simulations (ADS) to support cost-effective testing of an integrated missile weapon/launch aircraft system in an operationally realistic scenario. The SIT missions simulate a single shooter aircraft launching an air-to-air missile against a single target aircraft. In the LSP, the shooter, target, and missile were all represented by simulation laboratories. ADS techniques were used to link NAWCWPNS manned flight laboratories representing the aircraft to an air-to-air missile hardware-in-the-loop (HWIL) laboratory representing the missile. In order for this linking to have utility for the T & E of the AIM-9M missile under test the latency of the data exchanged between the laboratories must be sufficiently low and well-behaved so as not to adversely affect the fidelity of the missile laboratory performance. This paper presents the results of the evaluation of latency and its effects on LSP results. Conclusions for T & E applications of the LSP ADS configuration are also given.
Author: Larry McKee
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Languages : en
Pages : 11
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The Live Fly Phase (LFP) of the Systems Integration Test (SIT) was executed by the Joint Advanced Distributed Simulation (JADS) Joint Test Force (JTF) and the 46th Test Wing at Eglin AFB, FL during 1997. The purpose of the SIT was to evaluate the utility of using advanced distributed simulation (ADS) to support cost-effective testing of an integrated missile weapon/launch aircraft system in an operationally realistic scenario. The SIT missions simulated a single shooter aircraft launching an air-to-air missile against a single target aircraft. In the LFP, the shooter and target were represented by live aircraft and the missile by a simulator. ADS techniques were used to link two live F-16 fighter aircraft flying over the Eglin Gulf Test Range to the AMRAAM AIM-120 hardware-in-the-loop (HWIL) simulation facility at Eglin. In order for this linking to have utility for the T & E of the AMRAAM missile under test, the latency variations between the live aircraft and the missile HWIL simulation facility had to be removed so that the aircraft entity state and missile launch data could be properly synchronized to the missile simulation. This paper presents the techniques used to synchronize inputs to the missile HWIL simulation and their effectiveness at achieving the required degree of synchronization. Also, the resulting latency is characterized, and conclusions on T & E applications of the LFP ADS configuration are given.
Author: Larry McKee
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Category :
Languages : en
Pages : 11
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The Joint Advanced Distributed Simulation (JADS) Joint Test and Evaluation (JT & E) was chartered by the Office of the Secretary of Defense (Acquisition and Technology) in October 1994 to investigate the utility of advanced distributed simulation (ADS) technologies for support of test and evaluation (T & E). The JADS Joint Test Force (JTF) conducted a System Integration Test (SIT) in which ADS was used to support the testing of an integrated missile weapon/launch aircraft system in operationally realistic scenarios. The SIT scenarios simulated a single shooter aircraft launching an air-to-air missile against a single target aircraft. Extensive testing was performed involving two different ADS architectures: (1) A linked laboratory configuration in which the shooter and target were represented by manned flight laboratories and the missile by an AIM-9M Sidewinder hardware-in-the-loop (HWIL) laboratory. (2) A live shooter/target configuration in which the shooter and target were represented by live F-16 fighters and the missile by an AIM-120 Advanced Medium Range Air-to-Air Missile (AMRAAM) HWIL laboratory. Testing was completed in October 1997, and evaluation of the results Supports the conclusion that each ADS configuration has utility for T & E of the corresponding air-to-air missile involved. This paper discusses the following: (1) Description of the two different architectures utilized in the SIT testing. (2) Technical challenges in implementing ADS. (3) Lessons learned from implementing ADS. (4) Conclusions on the utility of ADS-based testing of air-to-air missiles. (5) Benefits of implementing AD S-based testing of air-to-air missiles.
Author: Larry McKee
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Category :
Languages : en
Pages : 12
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The Joint Advanced Distributed Simulation Joint Test and Evaluation (JADS JT & E) was chartered by the Deputy Director, Test, Systems Engineering and Evaluation (Test and Evaluation), Office of the Under Secretary of Defense (Acquisition and Technology) in October 1994 to investigate the utility of Advanced Distributed Simulation (ADS) technologies for support of Developmental Test and Evaluation (DT & E) and Operational Test and Evaluation (OT & E). The program is Air Force led, with Army and Navy participation, and is nominally scheduled for five years. The JADS JT & E is tasked in three areas: Investigate the present utility of ADS for T & E; Identify the critical constraints, concerns, and methodologies when using ADS for T & E; Identify the requirements that must be introduced into ADS systems if they are to support a more complete T & E capability in the future. The JADS JT & E is executing its charter by evaluating the application of ADS to the T & E of representative military systems. The types of systems selected represent three slices of the T & E spectrum: a System Integration Test (SIT) which explores ADS support of air-to-air missile testing, an End-To-End (ETE) test which explores ADS support for Command, Control, Communications, Computers, and Intelligence (C41) testing, and an Electronic Warfare (EW) test which explores ADS support for EW testing. The JTF will broaden the conclusions developed in the three dedicated test areas by leveraging off of ADS activities sponsored and conducted by other agencies. The SIT consists of two phases. The first phase, the Linked Simulators Phase (LSP), has been completed and employed an all-simulator architecture for testing an AIM-9 Sidewinder missile. The second phase is now underway and links live shooter and target aircraft to an AIM-i 20 AMRAAM hardware-in-the-loop (HWIL) simulation at Eglin AFB.
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Languages : en
Pages : 0
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The Live Fly Phase (LFP) of the Systems Integration Test (SIT) was executed by the Joint Advanced Distributed Simulation (JADS) Joint Test Force (JTF) and the 46th Test Wing at Eglin AFB, FL during 1997. The purpose of the SIT was to evaluate the utility of using advanced distributed simulations (ADS) to support cost-effective testing of an integrated missile weapon/launch aircraft system in an operationally realistic scenario. The SIT missions simulated a single shooter aircraft launching an air-to-air missile against a single target aircraft. In the LFP, the shooter and target were represented by live aircraft and the missile by a simulator. ADS techniques were used to link two live F-16 fighter aircraft flying over the Eglin Gulf Test Range to the Advanced Medium Range Air-to-Air Missile (AMRAAM) AIM-120 hardware-in-the-loop (HWIL) simulation facility at Eglin. This configuration had both DT and OT characteristics. There was a DT flavor because an HWIL facility was used to simulate the missile. This allowed the detailed performance of missile subsystems to be monitored, typical of a DT test. The OT characteristics of the LFP resulted from the use of aircraft performing operationally realistic engagements. Two baseline scenarios were selected from the AMRAAM FOT & E(2) live fire test series and modified for replication in the LFP trials. There were four major test objectives of the LFP: (1) Assess the validity of AMRAAM data generated in the LFP ADS configuration. (2) Assess the ability of the LFP ADS configuration to perform AMRAAM testing. (3) Assess the ability to link live aircraft to a missile HWIL simulation. (4) Evaluate the ability of the LFP ADS configuration to support distributed missile testing. This paper describes the LFP testing that was conducted during 1997, presents the results from evaluating the test objectives, and summarizes the utility of the LFP ADS configuration for air-to-air missile T & E.
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Category : Aeronautics
Languages : en
Pages : 974
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Author: Steven Sturgeon
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Category :
Languages : en
Pages : 20
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The Live Fly Phase (LFP) of the Systems Integration Test (SIT) was executed by the Joint Advanced Distributed Simulation (JADS) Joint Test Force (JTF) and the 46th Test Wing at Eglin AFB, FL during 1997. The purpose of the SIT is to evaluate the utility of using advanced distributed simulations (ADS) to support cost-effective testing of an integrated missile weapon/launch aircraft system in an operationally realistic scenario. The SIT missions simulate a single shooter aircraft launching an air-to-air missile against a single target aircraft. In the LFP, the shooter and target were represented by live aircraft and the missile by a simulator. ADS techniques were used to link two live F-16 fighter aircraft flying over the Eglin Gulf Test Range to the AMRAAM AIM-120 hardware-in-the-loop (HWIL) simulation facility at Eglin. In order to successfully integrate these assets for a near real-time test, the JADS team learned several lessons during the risk reduction and test execution phases. The lessons highlighted here concern test control aspects, computer processing, and telemetry issues. Control of a distributed test dealt with tactical aircraft control, scenario and data collection decisions, collocation of critical project personnel, and voice communications. Computer processing lessons dealt with simulated GPS data, pre-processing live GPS data from several aircraft pods, creation of an aircraft to HWIL-missile interface, and contingency planning for real-time malfunctions. Telemetry issues concerned aircraft and terrain shielding, and an implementation to handle random sensor dropouts. These lessons would be applicable for other projects when coupling live and virtual assets for evaluation of fire control radars or precision guided munitions. Many lessons on control and processing also apply to simulation tests which link distributed facilities.
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Languages : en
Pages : 292
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This study examined the effect of data latency upon air-to-air guided missile accuracy. This research was done by modeling a digital guided missile, inserting the model into a computer simulation and generating miss distance statistics. The digital guided missile was modeled after the DIS microcomputer architecture. The DIS (Digital Integrating Subsystem) approach involves a number of loosely coupled microprocessors which communicate over a serial multiplex bus. It was developed at the Air Force Armament Lab., Eglin AFB, FL. The missile simulation, Tactics IV, involves three degrees of freedom and is written in Fortran IV. It was developed by Science Applications, Inc in conjunction with AFWAL/FIMB, Wright Patterson AFB, OH. The results of this study indicate that typical data latency values generate only small increases in miss distance. The maximum delays tested were .01 seconds and the average increase in miss distance was 2.12 feet. Additionally, it was discovered that the transmission rate of the DIS microcomputers greatly affected miss distance. Microcomputers transmitting at 10 HZ generated large miss distances, even without data latency present. The identical missile engagements using transmission rates of 100 HZ resulted in much smaller miss distances.
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Category : Aeronautics
Languages : en
Pages : 704
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Languages : en
Pages : 0
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The Joint Advanced Distributed Simulation (JADS) Joint Test Force (JTF) is chartered by Office of the Secretary of Defense to investigate the utility of Advanced Distributed Simulation (ADS) Technology to Test and Evaluation (T & E). JADS is executing three test programs (C4I, Precision Guided Munitions and Electronic Warfare) representing slices of the overall T & E spectrum as well as observing other activity within the T & E community to form its conclusions. One of the slices, the Electronic Warfare test, is using HLA. To understand expected latency prior to the test execution, JADS is building a testbench to integrate and test the hardware and principle software components. This paper discusses the JADS plan to test the wide area network system latency prior to building the network and hosting the self-protection jammer (SPJ) test federation. The primary focus of this paper is on the process and tools used by JADS to characterize the RTI/network interactions, the system characterization measurements made in the testbed, and how that characterization will be fed back into the federation design.
