Active vibration control of large space flexible slewing truss using cable actuator with input saturation

Under transient wind disturbance, vibration deformation of the large antenna surface profile causes deterioration of pointing performance. This paper presents a new adaptive system to suppress unknown transient wind disturbance. First, to monitor the vibration, based on the acceleration measurement and a low-order flexible model considering equivalent identification of forces, the real-time estimation of the vibration state is obtained in an unbiased minimum-variance way. Next, a novel four-cable-actuator mechanism with a circular slide track is proposed for suppressing the vibration, in which the locations of the cable drivers on the slide track are determined according to the attitude of the antenna, and the expected tension distribution of the cables is found by the vibration state and the optimal gain of the linear quadratic regulator (LQR). In the end, the simulation implementation of a 7.3 m antenna under the transient wind disturbance is used to verify the effectiveness of the proposed method.

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“…And a cable-actuator control system (CACS) can be approximately considered a first order of inertia [18]:…”

Section: Cable Tension Controller To Suppress the Vibration Based On Lqrmentioning

confidence: 99%

A New Adaptive System for Suppression of Transient Wind Disturbance in Large Antennas

Liang

Huang

Zhang

2019

International Journal of Antennas and Propagation

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“…Among various feedback control methods, because the structure of the single-link flexible manipulator is relatively simple, model-based control methods have been widely studied, such as singular perturbation method, 15–17 sliding mode control, 18–20 robust control, 21,22 LQR, 23,24 etc. In these literatures, the mathematical model of flexible manipulator is established by homogeneous beam or concentrated mass.…”

Section: Introductionmentioning

confidence: 99%

Fast luffing control of flexible boom of mobile elevated work platform with uncertain control input gain

Fang

Zhang

et al. 2023

Advances in Mechanical Engineering

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In this paper, the dynamic model between input electric signal of hydraulic valve and boom luffing angle is established, and luffing control of flexible boom of mobile elevated work platform (MEWP) is studied. The control input gain for the luffing motion of the MEWP is extremely difficult to solve and varies with boom length, work platform load, and luffing angle. For the variable control input gain, all low-order state quantities, rigid-flexible coupling quantity, and control input are included as the “total disturbance” to be observed. Based on the third-order linear tracking differentiator and the first-order ordinary differential linear equation, an active disturbance rejection controller without control input gain is proposed. With the bandwidth-based parameter settings, the controller only needs to adjust two parameters. As a comparison, this paper analyzes in detail the proposed controllers, the fixed input gain active disturbance rejection controller and the PID controller in terms of tracking error, overshoot, setting time, tracking stability, and robustness.

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“…At present, many types of actuators are used to suppress the active vibrations of large flexible structures, including piezoelectric patches, 3,4 piezoelectric stacks, 5-10 voice coils, 11-13 air thrusters 14 and cables. 15,16 Piezoelectric stack actuators have advantages of wideband action, simplicity, reliability, compactness, portability, low power consumption and easy application. 2 As a result, we chose this type for this study.…”

Section: Introductionmentioning

confidence: 99%

Integral terminal sliding-mode robust vibration control of large space intelligent truss structures using a disturbance observer

Tian

Guo

2021

Proceedings of the Institution of Mechanical Engineers, Part G:

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This study aims to develop an advanced integral terminal sliding-mode robust control method using a disturbance observer (DO) to suppress the forced vibration of a large space intelligent truss structure (LSITS). First, the dynamics of the electromechanical coupling of the piezoelectric stack actuator and the LSITS, based on finite element and Lagrangian methods, are established. Subsequently, to constrict the vibration of the structure, a novel integral terminal sliding-mode control (ITSMC) law for the DO is used to estimate the parameter perturbation of the LSITS based on a continuous external disturbance. Simulation results show that, under a forced vibration and compared with the ITSMC system without a DO, the displacement amplitude of the ITSMC system with the DO is effectively reduced. In the case where the model parameters of the LSITS deviate by ±50%, and an unknown continuous external disturbance exists, the control system with the DO can adequately attenuate the structural vibration and realize robust control. Concurrently, the voltage of the employed piezoelectric stack actuator is reduced, and voltage jitter is alleviated.

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Active vibration control of large space flexible slewing truss using cable actuator with input saturation

Cited by 3 publications

References 25 publications

A New Adaptive System for Suppression of Transient Wind Disturbance in Large Antennas

A New Adaptive System for Suppression of Transient Wind Disturbance in Large Antennas

Fast luffing control of flexible boom of mobile elevated work platform with uncertain control input gain

Integral terminal sliding-mode robust vibration control of large space intelligent truss structures using a disturbance observer

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