A CFD-based numerical virtual flight simulator and its application in control law design of a maneuverable missile model

Zhang, Laiping; Chang, Xinghua; Ma, Ruixuan; Zhao, Zhong; Wang, Nianhua

doi:10.1016/j.cja.2019.07.001

Cited by 9 publications

(7 citation statements)

References 22 publications

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“…More details is given by Zhang et al. 47 The infrastructure and executive is an event-driven infrastructure that is component unaware. The components themselves can produce or respond to events and subscribe to or publish data; thus, the infrastructure and executive are coded once with the use of cases and contributing components specified by the input file.…”

Section: The Integrated Coupling Methods For Fish Self-propelled Swimmmentioning

confidence: 99%

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A numerical simulation method for bionic fish self-propelled swimming under control based on deep reinforcement learning

Lang

Chang

Tian

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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In order to simulate the under control self-propelled swimming of bionic fishes, a coupling method of hydrodynamics/kinematics/motion-control is presented in this paper. The Navier-Stokes equations in the arbitrary Lagrangian-Eulerian framework are solved in parallel based on the computational domain decomposition to simulate the unsteady flow field efficiently. The flow dynamics is coupled with the fish dynamics in an implicit way by a dual-time stepping approach. In order to discretize the computational domain during a wide range maneuver, an overset grid approach with a parallel implicit hole-cutting technique is adopted and coupled with morphing hybrid grids around the undulation body. The motion control of the fish swimming is realized by a deep reinforcement learning algorithm, which makes the fish model choose proper undulation manner according to a specific purpose. By adding random disturbances in the training process of fish swimming along a straight line, a simplified two-dimensional fish model obtains the ability to swim along a specific trajectory. Then in subsequent tests, the two-dimensional fish model is able to swim along more complex curves with obstacles. Finally, the starting process of a three-dimensional tuna-like model is simulated preliminarily to validate the ability of the coupling method for three-dimensional complex configurations. The numerical results demonstrate that this study could be used to explore the swimming mechanism of fishes in complex environments and to guide how robotic fishes can be controlled to accomplish their tasks.

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Section: The Integrated Coupling Methods For Fish Self-propelled Swimmmentioning

confidence: 99%

“…5,6 In addition, the coupled solver without maneuvering control has also been validated with some typical test cases. 36,43,47 So, here we will not repeat them again for brevity.…”

Section: The Integrated Coupling Methods For Fish Self-propelled Swimmmentioning

confidence: 99%

A numerical simulation method for bionic fish self-propelled swimming under control based on deep reinforcement learning

Lang

Chang

Tian

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…Meanwhile, unsteady effects such as the dynamic lift and vortex breakdown also result in challenges to control the aircraft securely. Traditional control law design methods based on linear assumptions with small perturbations are no longer suitable [4]. Hence, aircraft designers call for more accurate methods that consider unsteady effects.…”

mentioning

confidence: 99%

“…In previous work [4,20], the authors also developed an NVF simulation tool, named Hybrid Platform for Engineering and Research of FLOWs-Numerical Virtual Flight Simulator (Hyper-FLOW-NVFS). The NVF simulator integrates an unsteady Reynolds-averaged Navier-Stokes (RANS) solver on dynamic grids, a hybrid dynamic grid generator, a rigid-body dynamics solver, and a user-defined flight control system (FCS).…”

mentioning

confidence: 99%

“…The NVF simulator integrates an unsteady Reynolds-averaged Navier-Stokes (RANS) solver on dynamic grids, a hybrid dynamic grid generator, a rigid-body dynamics solver, and a user-defined flight control system (FCS). This NVF simulator is designed by the object-oriented programming approach with the modularity designing method [4]. The verification and validation were carried out also to ensure the credibility of the NVF simulator [20].…”

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confidence: 99%

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Numerical Virtual Flight Simulation of Quasi-Cobra Maneuver of a Fighter Aircraft

Wang

Chang

et al. 2021

Journal of Aircraft

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By using a computational-fluid-dynamics-based numerical virtual flight (NVF) simulator, a simplified quasi-Cobra maneuver of a typical third-generation fighter is simulated and the unsteady aerodynamics, such as the dynamic forces and moments and the flow separation, are analyzed preliminarily. The NVF simulator integrates an unsteady Reynolds-averaged Navier-Stokes (RANS) solver on dynamic unstructured/hybrid grids, a rigid-body dynamics solver, and user-defined flight control system. To analyze the complex multiphysics coupling problem, four cases with increasing complexity are studied, including 1) static state simulation; 2) one-degree-of-freedom (1-DOF) forced pitchup; 3) 1-DOF pitchup by open-loop control of the elevators; and 4) three-degree-of-freedom (3-DOF) quasi-Cobra maneuvering. By applying a cosine function open-loop flight control law to the elevators and introducing a simplified vector thrust model, the fighter can pitch up to a high angle of attack from the cruising state, and then it can pitch down quickly, the whole process is similar to a Cobra maneuver. Even though the RANS simulations are not necessarily highly accurate for the large angle of attack, the multidisciplinary application in this work demonstrates the potential of the NVF simulator for the simulations of realistic poststall maneuvers.

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A parallel implicit hole-cutting method based on background mesh for unstructured Chimera grid

Chang

Wang

et al. 2020

Computers & Fluids

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A CFD-based numerical virtual flight simulator and its application in control law design of a maneuverable missile model

Cited by 9 publications

References 22 publications

A numerical simulation method for bionic fish self-propelled swimming under control based on deep reinforcement learning

A numerical simulation method for bionic fish self-propelled swimming under control based on deep reinforcement learning

Numerical Virtual Flight Simulation of Quasi-Cobra Maneuver of a Fighter Aircraft

A parallel implicit hole-cutting method based on background mesh for unstructured Chimera grid

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