Nonlinear H∞ control scheme for a flying robot

Razmavar, Vahid; Talebi, Heidar Ali; Abdollahi, Farzaneh

doi:10.1590/1679-78255467

Cited by 3 publications

(6 citation statements)

References 25 publications

(23 reference statements)

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“…The content of flavonoids can inhibit gram-positive bacteria such as S. aureus [16]. Types of plants with strong inhibitory power contain secondary metabolites in the form of flavonoids, saponins, tannins and triterpenoids.…”

Section: < 5 Weakmentioning

confidence: 99%

“…According to the research results of Lestari et al, 2016, Nipah leaves contain polyphenols, flavonoids, triterpenoids/steroids, saponins and alkaloids that have anti-bacterial activity against Gram-negative and positive bacteria. [16] Phytochemical screening of Baeckea frutescens L extract showed alkaloids, flavonoids, steroids, Advances in Biological Sciences Research, volume 11 terpenoids, phenols, and carbohydrates. The presence of alkaloids is of interest because of their practical use as antimalarial, analgesic and stimulant-flavonoids are known to prevent tumour growth and are also used to protect against infection.…”

Section: < 5 Weakmentioning

confidence: 99%

“…This is supported by research by Mayer (1982), which states that an extract shows toxicity activity in the Brine shrimp lethality test (BSLT) if the extract can cause the death of 50% of the test animals at a concentration of LC50 <1000 ppm. Phenolic compounds (flavonoids, terpenoids and tannins) are poisonous which are antitoxic, meaning they have the potential for cancer drugs [16], stated that phenolics are toxic compounds that have the potential to be anti-cancer, specifically for P. reticulatus var. reticulatus has very high toxicity with a value of <10 ppm, this is following what is found in the community that P. reticulatus var.…”

Section: Toxicitymentioning

confidence: 99%

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The Potential of Katuk Hutan (Phylanthus reticulus) as a Medicinal Plant

Husodo¹,

Budiarso²,

Kusuma³

et al. 2021

Advances in Biological Sciences Research

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Katuk Hutan (Phylanthus reticulus) is a pioneer plant that grows in Papua. This plant belongs to the Phylantaceae family, which is commonly used as a medicinal plant. This study aimed to determine the potential of katuk hutan (P. reticulus) as a medicinal plant. The method used in phytochemical testing. A colour-changing test did a phytochemical analysis. Antioxidant activity was tested by DPPH radical rinsing activity mechanism method, and antimicrobial testing was used the diffusion method using Propionibacterium acnes, Streptococcus sobrinus, Escherichia coli and Candida albicans fungi. To test the toxicity of P. reticulatus leaves using the Brine Shrimp Lethality Test (BLST) method. P. reticulus with a yield of 12.48-27.60%, containing alkaloids, flavonoids, steroids, saponins, tannins, triterpenoids, carotenoids, coumarin; and is a powerful antioxidant with an IC value of <50. P. reticulus can inhibit P. acnes, E. coli and C. albicans fungi and cannot inhibit S. sobrinus bacteria. The leaves of P. reticulus have a very high toxicity potential as a cancer drug.

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Section: < 5 Weakmentioning

confidence: 99%

Section: < 5 Weakmentioning

confidence: 99%

Section: Toxicitymentioning

confidence: 99%

See 1 more Smart Citation

The Potential of Katuk Hutan (Phylanthus reticulus) as a Medicinal Plant

Husodo¹,

Budiarso²,

Kusuma³

et al. 2021

Advances in Biological Sciences Research

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“…[41] Furthermore, Razmavar et al proposed a state feedback control law for a flying robot with external disturbances, optimizing the control parameters through HJI inequalities. [42] Drawing inspiration from the aforementioned control algorithms, in this study, an HJI inequality-based dual-loop DP control law is proposed for ships with multiple constraints. This study makes the following key contributions:…”

Section: Introductionmentioning

confidence: 99%

Dual‐Loop Control Design for Dynamic Positioning Ships with Prescribed Performance

Gong,

Su,

et al. 2023

Advcd Theory and Sims

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Dynamic positioning (DP) system is an advanced positioning system widely used in various special operation ships, and the design of control strategies to cope with different constraint conditions is the core technology of DP system research. In this study, a novel dual‐loop control law is proposed to effectively tackle the control challenges encountered by DP ships, particularly in the presence of input saturation and error constraints. Firstly, a saturation handling model is designed to avoid input saturation in the system. Subsequently, a dual‐loop DP control scheme is developed. The outer‐loop is responsible for the ship's position and heading control, while concurrently providing the command velocity signal essential for the inner‐loop. Specifically, a prescribed performance control strategy is designed in the outer‐loop to ensure precise control over positioning errors within predefined ranges and achieve desirable transient and steady‐state performance. The inner‐loop controls the ship's velocity signal, in which a feedback control law is designed based on Hamilton‐Jacobi‐Issacs (HJI) inequality to estimate generalized faults of the DP system. Finally, the proposed control law is validated through numerical simulations on a 76.2 m supply ship, demonstrating superior transient and steady‐state performance compared to existing methods.

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“…This approach has been implemented for the attitude control in [22,23]. A nonlinear ∞ method is solved analytically for altitude as well as attitude control [24].…”

Section: Introductionmentioning

confidence: 99%

A composite controller based on nonlinear H_∞ and nonlinear disturbance observer for attitude stabilization of a flying robot

Razmavar

Talebi

Abdollahi

2021

IJEECS

Self Cite

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<span>In this article a novel composite control technique is introduced. We added a nonlinear disturbance observer to a nonlinear H_∞ control to form this composite controller. The quadrotor kinematics and dynamics is formulated using euler angles and parameters. After that, this nonlinear robust controller is developed for this flying robot attitude control for the outdoor conditions. Because under these conditions the flying robot, experiences both external disturbance and parametric uncertainty. Stability analysis is also presented to show the global asymptotical stability using a Lyapunov function. The simulation results showed that the suggested composite controller had a better performance in comparison with a nonlinear H_∞ control scheme.</span>

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Nonlinear H∞ control scheme for a flying robot

Cited by 3 publications

References 25 publications

The Potential of Katuk Hutan (Phylanthus reticulus) as a Medicinal Plant

The Potential of Katuk Hutan (Phylanthus reticulus) as a Medicinal Plant

Dual‐Loop Control Design for Dynamic Positioning Ships with Prescribed Performance

A composite controller based on nonlinear H_∞ and nonlinear disturbance observer for attitude stabilization of a flying robot

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