Nonlinear and Linear Autopilot Performance Comparison of Tactical Flight Vehicle

Padhi, Radhakant; Sarkar, A. K.; Kar, P.; Srinivasan, T. N.; Sirisha, Chv

doi:10.2514/6.2012-4683

Cited by 9 publications

(6 citation statements)

References 18 publications

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“…2 represents the overall control structure of the proposed controller. This is similar to the well-known three-loop structure [4][5][6][7]. The differences are that δ trim is added up to the inner loop controller and the effective control gains are automatically scheduled as the operating conditions change.…”

Section: Discussion Of Controllermentioning

confidence: 98%

“…This section describes the autopilot design for normal acceleration control using the feedback linearization technique and the two time-scale separation, via three-loop topology [4][5][6][7]. In the feedback linearization techniques, the choice of the desired error dynamics can determine the control structure.…”

Section: Proposed Controller For Acceleration Controlmentioning

confidence: 99%

“…In both flight environments, we select the normal acceleration as the output to be controlled. The feedback linearization technique is then applied along with the specific desired error dynamics [4][5][6][7] to design the proposed controller. To investigate the performance of the proposed method, a simulation study using a nonlinear interceptor model [8] is performed.…”

Section: Introductionmentioning

confidence: 99%

“…Also, under the proposed controller, the aerodynamic force and the thrust are automatically allocated to produce the normal acceleration required according to the effectiveness of the aerodynamic force and the thrust. Finally, the result controller is given by a similar form of the well-known threeloop controller [4][5][6][7] with parameter-varying control gains. Therefore, the physical meaning of the proposed controller is clearly presented.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Nonlinear acceleration controller for exo-atmospheric and endo-atmospheric interceptors with TVC

Lee

Jun

Shin

et al. 2017

2017 25th Mediterranean Conference on Control and Automation (MED)

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In this paper, we propose a nonlinear acceleration controller that can be used for both the endo-and exoatmospheric interceptors with thrust vector control (TVC) without changing the control configuration. The acceleration perpendicular to the velocity vector is selected as the output to be controlled. Then apply the feedback linearization and the specific form of the desired error dynamics to create the resulting controller which is given by the well-known three loop control structure with parameter-varying control gains. According to changes in altitude operating conditions, the proposed controller can adaptively allocate the aerodynamic force and the thrust to produce the required normal acceleration. Also, we can have confidence in the reliability of the proposed controller because it is given by a similar form of the well-known three loop controller. Numerical simulations are performed to show the validity of the proposed method.

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Section: Discussion Of Controllermentioning

confidence: 98%

Section: Proposed Controller For Acceleration Controlmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Nonlinear acceleration controller for exo-atmospheric and endo-atmospheric interceptors with TVC

Lee

Jun

Shin

et al. 2017

2017 25th Mediterranean Conference on Control and Automation (MED)

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“…13, the rate of the normal acceleration is determined as Eq. (16). Note, in this derivation, it is assumed that terms regarding the rate of the deflection angle,δ t , are small.…”

Section: A Proposed Control Mechanismmentioning

confidence: 99%

Nonlinear Autopilot Design for Endo- and Exoatmospheric Interceptor With Thrust Vector Control

Hong

Lee

2020

IEEE Trans. Aerosp. Electron. Syst.

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This paper proposes an autopilot design for an interceptor with Thrust-Vector-Control (TVC) that operates in the endo-and exo-atmospheric regions. The main objective of the proposed autopilot design is to ensure control performance in both atmospheric regions, without changing the control mechanism. In this paper, the characteristics of the aerodynamic forces in both atmospheric regions are first investigated to examine the issue of the conventional control mechanism at various altitudes. And then, a control mechanism, which can be applied to both atmospheric regions, is determined based on the analysis results. An autopilot design is then followed by utilizing the control mechanism and the feedback linearization control (FBLC) method. Accordingly, the proposed autopilot does not rely on changing the control mechanism depending on flight condition unlike the conventional approach as well as it can adjust the control gains automatically according to the changes of flight operating conditions. In this paper, the robustness of the proposed autopilot is investigated through the tracking error analysis and the relative stability analysis in the presence of model uncertainties. The physical meaning of the proposed autopilot is also presented by comparing to the well-known three-loop control structure. Finally, numerical simulations are performed to show the performance of the proposed method.

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Investigation on Physical Meaning of Three-loop Autopilot

Lee

Hong

2020

Int. J. Control Autom. Syst.

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Nonlinear and Linear Autopilot Performance Comparison of Tactical Flight Vehicle

Cited by 9 publications

References 18 publications

Nonlinear acceleration controller for exo-atmospheric and endo-atmospheric interceptors with TVC

Nonlinear acceleration controller for exo-atmospheric and endo-atmospheric interceptors with TVC

Nonlinear Autopilot Design for Endo- and Exoatmospheric Interceptor With Thrust Vector Control

Investigation on Physical Meaning of Three-loop Autopilot

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