Inertially Stabilized Platform for Airborne Remote Sensing Using Magnetic Bearings

Lin, Zhuchong; Liu, Kun; Zhang, Wei

doi:10.1109/tmech.2015.2451137

Cited by 22 publications

(9 citation statements)

References 18 publications

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“…The magnetic flux density in the vertical winding region 1 and the left horizontal winding region 2 are analyzed. The coupling of the upper flux and the lower flux in the partition region 3 is analyzed.…”

Section: Mathematical Model Analysis Of Distribution Characteristics mentioning

confidence: 99%

“…The multi-degree-of-freedom positioning platforms are widely used in aerospace and industrial manufacturing, such as optical imaging systems, lithographic processing of semiconductors and precision machining [ 1 , 2 , 3 , 4 , 5 ]. But there are some disadvantages of the friction, wear creep and contact fatigue in mechanical contact platforms, which limits the improvement of positioning accuracy [ 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

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A Novel 2-DOF Lorentz Force Actuator for the Modular Magnetic Suspension Platform

Yang

Zhao

et al. 2020

Sensors

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The modular magnetic suspension platform depends on multi degree of freedom of Lorentz force actuators for large bearing capacity, high precision positioning and structure miniaturization. To achieve the integration of vertical driving force and horizontal driving force, a novel 2- (two degrees-of-freedom) DOF Lorentz force actuator is developed by designing the pose of the windings and permanent magnets (PMs). The structure and the working principle are introduced. The electromagnetic force mathematical model is established by the equivalent magnetic circuit method to analyze the coupling of magnetic flux. The distribution characteristics of magnetic flux density are analyzed by the finite-element method (FEM). It is found that the coupling of the magnetic flux and the large magnetic field gradient severely reduce the uniformity of the air-gap magnetic field. The electromagnetic force characteristic is investigated by FEM and measurement experiments. The difference between FEM and experiment results is within 10%. The reasons of driving force fluctuation are explained based on the distribution of air-gap magnetic field. The actuator performance are compared under the sliding mode control algorithm and PID control algorithm and the positioning accuracy is 20 μm and 15 μm respectively. Compared with the similar configuration, the motion range and force coefficient of the Lorentz force actuator in this paper are larger. It has a certain guiding significance on the structure design of the multi degree of freed Lorentz force actuator.

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Section: Mathematical Model Analysis Of Distribution Characteristics mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Novel 2-DOF Lorentz Force Actuator for the Modular Magnetic Suspension Platform

Yang

Zhao

et al. 2020

Sensors

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“…The application scenarios include carriers like unmanned vehicles, aerial carriers, and naval vessels. For instance, Zhuchong et al [3] developed an inertial-stabilized platform for airborne remote sensing using magnetic bearings. Zhou et al [4] presented the design of a mechatronic system for a two-axis inertial-stabilized platform in an unmanned helicopter-(UH-) based airborne power line inspection system.…”

Section: Introductionmentioning

confidence: 99%

Stability Precision Error Correction of Photoelectric Detection by Unmanned Aerial Vehicle

Hong

Gan

et al. 2021

Journal of Sensors

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For getting clear images and overcoming shaking caused by various disturbances, real-time compensation of pointing errors will improve the overall stability performance of photoelectric detection by unmanned aerial vehicle. However, the compensation will be greatly deteriorated by error-causing sources, and the error correction process is of great importance. In this research, the problem of stability precision error correction is comprehensively studied. First, by modeling overall kinematics, error-causing sources, and error compensation, the error correction process is mathematically modeled and simulated. Then, by using simulation data regression, error correction models including the global function model and parametric model are established. The models are validated by carrying out both simulations and validation experiments. At last, the performances of the error correction models are compared and analyzed, which concerns the factors of parameter identification, model simplicity, and final improvement effect. Results show that the final stability precision can be greatly improved over 20%, and the parametric model outperforms the global function model comprehensively. It can be concluded that, either in simulation environment or real application scenarios, the obtained models and related analysis results are effective in improving the system stability performance.

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“…Since the AMB system provides a contactless suspension to yaw gimbal, the vibration disturbances from other gimbals could be effectively isolated, and the friction between levitated gimbal and suspension elements would be minimized [18]. Moreover, the displacement of yaw gimbal is controllable by regulating the winding current of AMB system based on displacement feedback [19][20][21][22][23], and then the vibration isolation could be realized with the active controllability of an AMB system [24].…”

Section: Introductionmentioning

confidence: 99%

Coupling Analysis and Cross-Feedback Control of Three-Axis Inertially Stabilized Platform with an Active Magnetic Bearing System

Tong

Xiang

Wong

2020

Shock and Vibration

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An active magnetic bearing (AMB) system is used to suspend the yaw gimbal of three-axis inertially stabilized platform (ISP) to minimize the friction. The dynamic functions of three gimbals in ISP are developed. The base coupling at dynamic base plate is stronger than that at static base plate, and the gimbal coupling among three gimbals increases with the number of unlocked gimbals. Therefore, a cross-feedback control scheme is designed to minimize the base coupling and the gimbal coupling, and then the multi-input multioutput system of three-axis ISP with coupling terms is simplified into three decoupled single-input single-output systems. Experimental results verify that the yaw gimbal suspended by AMB system has better vibration isolation ability than the roll gimbal supported by mechanical bearing, and the gimbal coupling and the base coupling are effectively suppressed by the cross-feedback control scheme.

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Inertially Stabilized Platform for Airborne Remote Sensing Using Magnetic Bearings

Cited by 22 publications

References 18 publications

A Novel 2-DOF Lorentz Force Actuator for the Modular Magnetic Suspension Platform

A Novel 2-DOF Lorentz Force Actuator for the Modular Magnetic Suspension Platform

Stability Precision Error Correction of Photoelectric Detection by Unmanned Aerial Vehicle

Coupling Analysis and Cross-Feedback Control of Three-Axis Inertially Stabilized Platform with an Active Magnetic Bearing System

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