Robust fault-tolerant controller design for aerodynamic load simulator

Shamisa, Abdolah; Kiani, Zahra

doi:10.1016/j.ast.2018.04.035

Cited by 11 publications

(5 citation statements)

References 16 publications

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“…In the multi-loading system, which is a typical force control system [ 28 , 29 ], the excessive force is caused by desynchronization among loading channels. This decoupling method is designed from the term of ensuring consistent motion among channels.…”

Section: The Motion Synchronous Composite Control Methodsmentioning

confidence: 99%

Motion Synchronous Composite Decoupling with Fewer Sensors on Multichannel Hydraulic Force Control for Aircraft Structural Loading Test System

Bai

Jiao

Yao

et al. 2018

Sensors

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The aircraft full-scale fatigue test is widely used in the modern aircraft industry for the safety of flight. Generally, the aircraft full-scale fatigue test is achieved by structural loading; multiple hydraulic actuators are used to apply load for force control. The fatigue loading test takes approximately several years. A key challenge is how to accelerate the loading frequency to shorten the total test time. Nevertheless, when pluralities of hydraulic actuator simultaneously increase the loading frequency, the mutual coupling force from the low rigidity of the aircraft structure will cause a large loading error, meaning that the test cannot be implemented. Although it is possible to reduce error by adding sensors, the force sensors need to connect several kilometers of cable. This paper proposed a novel motion synchronous composite decoupling control strategy with fewer sensors. The control method compensates the negative coupling effect of the channels by integrating the command signals and feedback signals of all channels. It can suppress coupling force and reduce errors at higher frequencies, thereby shortening the experiment time. Opposed to traditional decoupling control methods, advantages of this strategy are that it only needs force sensors and it does not need additional displacement or velocity and acceleration sensors to collect state variables for building the state space. Furthermore, it has been experimentally verified that the new motion synchronous composite decoupling control method can indeed guarantee sufficient control accuracy when the test frequency is increased. The method has great economic significance for shortening test duration.

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Section: The Motion Synchronous Composite Control Methodsmentioning

confidence: 99%

Motion Synchronous Composite Decoupling with Fewer Sensors on Multichannel Hydraulic Force Control for Aircraft Structural Loading Test System

Bai

Jiao

Yao

et al. 2018

Sensors

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“…Scholars have proposed many advanced control strategies to eliminate the surplus torque of EDLS. The existing control strategies mainly include feed-forward compensation based on position or speed [9], adaptive neural network compensation method [10], adaptive robust control [7], novel robust control [11], proportional resonance (PR) control [6], iterative learning control (ILC) [12], etc. Jiao et al [13] proposed a compensation control strategy based on the structure invariance principle to eliminate the surplus torque, but this method requires an accurate system model.…”

Section: Introductionmentioning

confidence: 99%

PD-Type Iterative Learning Control with Adaptive Learning Gains for High-Performance Load Torque Tracking of Electric Dynamic Load Simulator

Dai

Zhao

et al. 2021

Electronics

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To realize the high-performance load torque tracking of an electric dynamic load simulator system with random measurement noises and strong position disturbances, a PD-type iterative learning control (ILC) algorithm with adaptive learning gains is proposed in this paper. With the principle of system analyzing, a nonlinear discrete state-space model is established. The adaptive learning gains is used to suppress the effects of periodic disturbances and random measurement noises on the load torque tracking performance. A traditional PD feedback controller in parallel with the proposed ILC is designed to stabilize the system and render the ILC converge quickly. The convergence analysis of the proposed control method ensures the stability of the system. Compared with the fixed learning gains, the experiment results show that the proposed control method has better load torque tracking performance and can effectively suppress the adverse effects of periodic and aperiodic disturbances on tracking accuracy.

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“…In practice, the displacement output generated by the rudder system and the torque output generated by the loading system will be coupled with each other. 6 This coupling action causes redundant and unexpected mechanical disturbance in the servo motion, which is called ''surplus force'' in academic circles. Surplus force causes a serious impact on the accuracy, frequency response and stability of the loading system.…”

Section: Introductionmentioning

confidence: 99%

Research on design method of double-loop electric servo loading system with high-frequency band based on H∞ control strategy

Shui

Wei

Yan

2020

Measurement and Control

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In the hardware-in-the-loop simulation, the goal of electric loading is to realize the accurate tracking of the torque signal and test the performance of the aircraft actuator system. For some high dynamic aircraft, it is necessary to reduce the influence of the surplus torque to increase the system frequency band. This paper introduces a new electric loading system which adopts a double-loop servo motor as the torque loading mechanism. It applies two loops to track the position of the rudder and the aerodynamic load spectrum respectively. For the purpose of reducing the disturbance between two loops of the scheme, a two-DOF H∞ robust controller is designed, which improves the robustness of the system effectively. The simulation results show that the new system increases the upper limit of 25 Hz frequency band of the traditional single-loop system with PID control to the maximum of 40 Hz. The double-loop system thereby meets the technical requirements of the hardware-in-the-loop simulation experiment for high dynamic aircrafts.

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Robust fault-tolerant controller design for aerodynamic load simulator

Cited by 11 publications

References 16 publications

Motion Synchronous Composite Decoupling with Fewer Sensors on Multichannel Hydraulic Force Control for Aircraft Structural Loading Test System

Motion Synchronous Composite Decoupling with Fewer Sensors on Multichannel Hydraulic Force Control for Aircraft Structural Loading Test System

PD-Type Iterative Learning Control with Adaptive Learning Gains for High-Performance Load Torque Tracking of Electric Dynamic Load Simulator

Research on design method of double-loop electric servo loading system with high-frequency band based on H∞ control strategy

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