Limits...
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.

Show MeSH

Related in: MedlinePlus

Semiphysical simulation platform.
© Copyright Policy - open-access
Related In: Results  -  Collection


getmorefigures.php?uid=PMC3927559&req=5

fig4: Semiphysical simulation platform.

Mentions: To investigate the efficiency of the proposed control strategy applying for the GCE, a semiphysical simulation platform is constructed to simulate the practical working conditions of the gun control system. The structure diagram and the photographic diagram of the platform are, respectively, illustrated in Figures 4(a) and 4(b). From the components as shown in Figure 4, the platform mainly consists of seven parts, namely, the control computer, the sensor system for measurement, the power amplifier (PA), the precision reduction gearbox (PRG), the loading fixture (LF), the actuating motor (AM), and the test bed. The loading fixture consisting of the rotational inertia plate (RIP) and the magnetic powder brake (MPB) is employed here for the simulation of the rotational inertia, the load torque, and the frictional resistance moment, which would be generated under the real working conditions. The rotational inertia variations of the loads can be well simulated by changing the RIP, and, similarly, the variations of the load torque and the frictional resistance moment can also be well simulated by controlling the output torque of the MPB.


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)

Semiphysical simulation platform.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

fig4: Semiphysical simulation platform.
Mentions: To investigate the efficiency of the proposed control strategy applying for the GCE, a semiphysical simulation platform is constructed to simulate the practical working conditions of the gun control system. The structure diagram and the photographic diagram of the platform are, respectively, illustrated in Figures 4(a) and 4(b). From the components as shown in Figure 4, the platform mainly consists of seven parts, namely, the control computer, the sensor system for measurement, the power amplifier (PA), the precision reduction gearbox (PRG), the loading fixture (LF), the actuating motor (AM), and the test bed. The loading fixture consisting of the rotational inertia plate (RIP) and the magnetic powder brake (MPB) is employed here for the simulation of the rotational inertia, the load torque, and the frictional resistance moment, which would be generated under the real working conditions. The rotational inertia variations of the loads can be well simulated by changing the RIP, and, similarly, the variations of the load torque and the frictional resistance moment can also be well simulated by controlling the output torque of the MPB.

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