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Development of a novel disturbance observer based fractional order PD controller for a gun control system.

Gao Q, Zheng L, Chen J, Wang L, Hou Y - ScientificWorldJournal (2014)

Bottom Line: The optimal control parameters of the FOPD are determined from the loop-shaping perspective, and the Q-filter of the DOB is deliberately designed with consideration of system robustness.The linear frame of the proposed control system will enable the analysis process more convenient.The disturbance rejection properties and the tracking performances of the control system are investigated by both numerical and experimental tests, the results demonstrate that the proposed DOB based FOPD control system is of more robustness, and it is much more suitable for the gun control system with strong nonlinearity and disturbance.

View Article: PubMed Central - PubMed

Affiliation: School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210014, China.

ABSTRACT
Motion control of gun barrels is an ongoing topic for the development of gun control equipment (GCE) with excellent performances. In this paper, a novel disturbance observer (DOB) based fractional order PD (FOPD) control strategy is proposed for the GCE. By adopting the DOB, the control system behaves as if it were the nominal closed-loop system in the absence of disturbances and uncertainties. The optimal control parameters of the FOPD are determined from the loop-shaping perspective, and the Q-filter of the DOB is deliberately designed with consideration of system robustness. The linear frame of the proposed control system will enable the analysis process more convenient. The disturbance rejection properties and the tracking performances of the control system are investigated by both numerical and experimental tests, the results demonstrate that the proposed DOB based FOPD control system is of more robustness, and it is much more suitable for the gun control system with strong nonlinearity and disturbance.

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Tracking performance of the control system with external disturbance.
© Copyright Policy - open-access
Related In: Results  -  Collection


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fig5: Tracking performance of the control system with external disturbance.

Mentions: To avoid repetition, Figure 5(a) only illustrates the tracking error of the control system with constant angular speed ; the estimated external disturbance signal is illustrated in Figure 5(b). As shown in Figure 5(a), the response time of the two control systems is about 0.26 s. The tracking error of the DOB based FOPD control system in the steady state is about 0.5 mil which is about 26.32% of that of the control system without the DOB. From the estimated disturbance signal shown in Figure 5(b), it verifies that the DOB can effectively estimate the disturbances. The enhanced tracking accuracy demonstrates that the DOB based FOPD control strategy can efficiently improve the robustness of the control system, and it indeed outperforms the conventional FOPD control strategy.


Development of a novel disturbance observer based fractional order PD controller for a gun control system.

Gao Q, Zheng L, Chen J, Wang L, Hou Y - ScientificWorldJournal (2014)

Tracking performance of the control system with external disturbance.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3927559&req=5

fig5: Tracking performance of the control system with external disturbance.
Mentions: To avoid repetition, Figure 5(a) only illustrates the tracking error of the control system with constant angular speed ; the estimated external disturbance signal is illustrated in Figure 5(b). As shown in Figure 5(a), the response time of the two control systems is about 0.26 s. The tracking error of the DOB based FOPD control system in the steady state is about 0.5 mil which is about 26.32% of that of the control system without the DOB. From the estimated disturbance signal shown in Figure 5(b), it verifies that the DOB can effectively estimate the disturbances. The enhanced tracking accuracy demonstrates that the DOB based FOPD control strategy can efficiently improve the robustness of the control system, and it indeed outperforms the conventional FOPD control strategy.

Bottom Line: The optimal control parameters of the FOPD are determined from the loop-shaping perspective, and the Q-filter of the DOB is deliberately designed with consideration of system robustness.The linear frame of the proposed control system will enable the analysis process more convenient.The disturbance rejection properties and the tracking performances of the control system are investigated by both numerical and experimental tests, the results demonstrate that the proposed DOB based FOPD control system is of more robustness, and it is much more suitable for the gun control system with strong nonlinearity and disturbance.

View Article: PubMed Central - PubMed

Affiliation: School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210014, China.

ABSTRACT
Motion control of gun barrels is an ongoing topic for the development of gun control equipment (GCE) with excellent performances. In this paper, a novel disturbance observer (DOB) based fractional order PD (FOPD) control strategy is proposed for the GCE. By adopting the DOB, the control system behaves as if it were the nominal closed-loop system in the absence of disturbances and uncertainties. The optimal control parameters of the FOPD are determined from the loop-shaping perspective, and the Q-filter of the DOB is deliberately designed with consideration of system robustness. The linear frame of the proposed control system will enable the analysis process more convenient. The disturbance rejection properties and the tracking performances of the control system are investigated by both numerical and experimental tests, the results demonstrate that the proposed DOB based FOPD control system is of more robustness, and it is much more suitable for the gun control system with strong nonlinearity and disturbance.

Show MeSH
Related in: MedlinePlus