Reduced-order active disturbance rejection control of fast steering mirror driven by VCA

Pu, 黄浦 Huang; Xiu-li, 杨秀丽 Yang; Ji-hong, 修吉宏 Xiu; Jun, 黎军 Li; LIYou-yi, 李友一

doi:10.3788/ope.20202806.1365

Cited by 7 publications

(3 citation statements)

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“…Sun et al designed an FSM flexible support structure based on four cross-axis flexural hinges, and used eddycurrent sensors to indirectly collect the motor's position information, but did not mention a decoupling method of measurement information [17]. Huang et al proposed a reduced order ADRC (active disturbance rejection control) method based on an FSM actuated by a VCA [18], which can improve the dynamic performance of FSM. However, it regarded the results of the eddy-current sensor as known, so it did not consider the decoupling strategy of the position feedback information [18].…”

Section: Related Workmentioning

confidence: 99%

“…Huang et al proposed a reduced order ADRC (active disturbance rejection control) method based on an FSM actuated by a VCA [18], which can improve the dynamic performance of FSM. However, it regarded the results of the eddy-current sensor as known, so it did not consider the decoupling strategy of the position feedback information [18]. Wang et al proposed a dual-feedforward and dual-neural-network adaptive decoupling control algorithm based on an analog control FSM, which compensated dc coupling component and non-dc coupling component, respectively, and the coupling degree was reduced from about 5% to less than 1.0 ‰.…”

Section: Related Workmentioning

confidence: 99%

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A Tracking Imaging Control Method for Dual-FSM 3D GISC LiDAR

Qian

et al. 2022

Remote Sensing

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In this paper, a tracking and pointing control system with dual-FSM (fast steering mirror) composite axis is proposed. It is applied to the target-tracking accuracy control in a 3D GISC LiDAR (three-dimensional ghost imaging LiDAR via sparsity constraint) system. The tracking and pointing imaging control system of the dual-FSM 3D GISC LiDAR proposed in this paper is a staring imaging method with multiple measurements, which mainly solves the problem of high-resolution remote-sensing imaging of high-speed moving targets when the technology is transformed into practical applications. In the research of this control system, firstly, we propose a method that combines motion decoupling and sensor decoupling to solve the mechanical coupling problem caused by the noncoaxial sensor installation of the FSM. Secondly, we suppress the inherent mechanical resonance of the FSM in the control system. Thirdly, we propose the optical path design of a dual-FSM 3D GISC LiDAR tracking imaging system to solve the problem of receiving aperture constraint. Finally, after sufficient experimental verification, our method is shown to successfully reduce the coupling from 7% to 0.6%, and the precision tracking bandwidth reaches 300 Hz. Moreover, when the distance between the GISC system and the target is 2.74 km and the target flight speed is 7 m/s, the tracking accuracy of the system is improved from 15.7 μrad (σ) to 2.2 μrad (σ), and at the same time, the system recognizes the target contour clearly. Our research is valuable to put the GISC technology into practical applications.

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Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

A Tracking Imaging Control Method for Dual-FSM 3D GISC LiDAR

Qian

et al. 2022

Remote Sensing

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“…They play important roles in industrial production, aerospace manufacturing, the nuclear industry, the petrochemical industry, safety testing, etc. In the field of mechanical vibration technology, eddy current sensors are mainly used for radial vibration measurements of rotating shafts and axial displacement measurements; in optoelectronic imaging systems, they are mostly used for angle measurements of fast steering mirrors [ 18 , 19 ]. According to the application method, eddy current sensors are divided into single-ended and differential types.…”

Section: Introductionmentioning

confidence: 99%

Single-Ended Eddy Current Micro-Displacement Sensor with High Precision Based on Temperature Compensation

Xu,

Feng,

Liu

et al. 2024

Micromachines

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To measure the micro-displacement reliably with high precision, a single-ended eddy current sensor based on temperature compensation was studied in detail. At first, the principle of the eddy current sensor was introduced, and the manufacturing method of the probe was given. The overall design plan for the processing circuit was induced by analyzing the characteristics of the probe output signal. The variation in the probe output signal was converted to pulses with different widths, and then it was introduced to the digital phase discriminator along with a reference signal. The output from the digital phase discriminator was processed by a low-pass filter to obtain the DC component. At last, the signal was amplified and compensated to reduce the influence of temperature. The selection criteria of the frequency of the exciting signal and the design of the signal conditioning circuit were described in detail, as well as the design of the temperature-compensating circuit based on the digital potentiometer with an embedded temperature sensor. Finally, an experimental setup was constructed to test the sensor, and the results were given. The results show that nonlinearity exists in the single-ended eddy current sensor with a large range. When the range is 500 μm, the resolution can reach 46 nm, and the repeatability error is ±0.70% FR. Within the temperature range from +2 °C to +58 °C, the voltage fluctuation in the sensor is reduced to 44 mV after temperature compensation compared to the value of 586 mV before compensation. The proposed plan is verified to be feasible, and the measuring range, precision, and target material should be considered in real-world applications.

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