Identification of nonlinear actuators with time delay and rate saturation using meta-heuristic optimization algorithms

Sarhadi, Pouria; Khosravi, Alireza; Bijani, Vahid

doi:10.1177/0959651815595569

Cited by 5 publications

(3 citation statements)

References 36 publications

(59 reference statements)

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“…By optimal tuning of the modulator, an appropriate sequence of on-off pulses can be generated to be applied to the thrusters. The PSO algorithm is used for the optimization of controller parameters in many studies such as designing a robust controller (Alfi et al, 2013; Lari et al, 2014), autopilot (Bijani et al, 2016) and identification of nonlinear actuators (Sarhadi et al, 2015). In Khosravi and Sarhadi (2016), tuning knobs of PWPF are obtained by the PSO algorithm.…”

Section: On-off Sdre Controlmentioning

confidence: 99%

Vibration suppression and attitude control for the formation flight of flexible satellites by optimally tuned on-off state-dependent Riccati equation approach

Rouzegar

Khosravi

Sarhadi

2020

Transactions of the Institute of Measurement and Control

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In this paper, vibration suppression and attitude control for the formation flight of flexible satellites using optimally tuned on-off SDRE (state-dependent Riccati equation) approach is discussed. A formation consisting of flexible satellites has highly nonlinear dynamics and the corresponding satellites are subject to vibrations as well as uncertainties due to the practical conditions. Vibrations that are mainly caused by flexible modes of the satellites disorganize the coordination and hinder the formation stability as well as decreasing its performance and lifetime. Hence, flexibility should be considered in formation model and the coordination control needs to address such challenges. Owing to capabilities of SDRE approach for nonlinear systems, it is used as the coordination control. Satellites are assumed to be equipped with thrusters as their actuators which requires the control to be applied as on-off pulses. To this end, an algorithm is suggested to efficiently convert SDRE control into on-off pulses. For optimal tuning of the controller, the particle swarm optimization (PSO) algorithm is employed. Stability of the system has also been analyzed via a Lyapunov-based approach utilizing the region of attraction concept. The proposed on-off SDRE approach has shown to effectively suppress the vibrations in the presence of uncertainties leading to the accurate coordination of the whole formation while consuming less energy. Simulation results show the capability, efficiency, robustness and stability of the suggested approach.

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Section: On-off Sdre Controlmentioning

confidence: 99%

Vibration suppression and attitude control for the formation flight of flexible satellites by optimally tuned on-off state-dependent Riccati equation approach

Rouzegar

Khosravi

Sarhadi

2020

Transactions of the Institute of Measurement and Control

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“…The influence of communication time delay characteristics has caused more complexity in identification (Sarhadi et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

A practical robust yaw servo architecture of ROVs by multi-vector propulsion and nonlinear controller

Song

Wang

et al. 2020

Transactions of the Institute of Measurement and Control

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Multi-vector arrangement is a novel propulsion architecture for remotely operated vehicles (ROV) because of its high manoeuvrability and efficiency, but the influence on the ROV dynamics and attitude servo control has not yet been clearly evaluated. This study fully investigated the kinematic behaviours of a hexagonal multi-vector propulsion ROV with communication delay constraint and reduced the complex model for precision control system design. An enhanced model-based PI robust controller (EMPRC) based on the nominal model is proposed to solve the nonlinear hydrodynamics and communication problems with high performance yaw control, whose stability is also analysed. The conventional proportional-integral-derivative (PID) and integral separation PID are used in the experiments for comparison. The results indicate that the proposed EMPRC can effectively track the desired attitude and reject the external disturbances, while the conventional ones are limited by the nonlinear dynamics and communication delays. The improvement is 3x on average in terms of overshoot, settling time and anti-disturbance recovery time compared to conventional algorithms and proves this proposed novel EMPRC is a practical solution for multi-vector propulsion ROVs.

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“…Moreover, in [20], automatic fighter tracking variable feedback gains are determined using PSO. Also, [21,13,14] have shown the applications of PSO in system identification area. As the main contribution, the paper shows how this optimization method can be employed for setting of PWPF based spacecraft controllers.…”

Section: Introductionmentioning

confidence: 99%

Tuning of Pulse-Width Pulse-Frequency Modulator using PSO: An Engineering Approach to Spacecraft Attitude Controller Design

Khosravi

Sarhadi²

2016

Automatika

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Identification of nonlinear actuators with time delay and rate saturation using meta-heuristic optimization algorithms

Cited by 5 publications

References 36 publications

Vibration suppression and attitude control for the formation flight of flexible satellites by optimally tuned on-off state-dependent Riccati equation approach

Vibration suppression and attitude control for the formation flight of flexible satellites by optimally tuned on-off state-dependent Riccati equation approach

A practical robust yaw servo architecture of ROVs by multi-vector propulsion and nonlinear controller

Tuning of Pulse-Width Pulse-Frequency Modulator using PSO: An Engineering Approach to Spacecraft Attitude Controller Design

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