Design and Application of a Deep-Sea Engineering Geology In Situ Test System

Zhong, Kaiming; Chen, Ming; Xie, Chao; Zheng, Junxing; Chen, Wei; Ou, Wen; Yu, Chunliang

doi:10.3390/min13020184

Cited by 2 publications

(1 citation statement)

References 12 publications

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“…where, is the error quantity, , and is predicted by the model, . Define the new state quantity: (6) Substitute (6) into Equation (5) to get the expression for the new state space: (7) where ( 8) is shortened to , is shortened to .…”

Section: Design Of Controllermentioning

confidence: 99%

Model prediction controller for penetration mechanism of seabed cone penetration test system

Wang,

Ren,

Zhou

et al. 2023

J. Phys.: Conf. Ser.

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The system of seabed Cone Penetration Test (CPT) is a kind of equipment for offshore investigations. Seabed CPT is used to assess multiple physical properties of marine sediments. Constant-rate penetration mechanism is the core part of seabed CPT, which adopts dual-cylinder drive to penetrate the probe rod into the seafloor sediments at a constant speed (2cm/s). At present, the domestic CPT and its penetration equipment almost all rely on imports. In the process of system design, we found that the traditional PID control of the hydraulic cylinder position control accuracy is low, so we need to study higher precision position tracking control method to achieve uniform penetration of the probe rod. In this paper, a Linear Time-Varying Model Predictive Controller (LTV-MPC) is introduced, which can control two hydraulic cylinders to penetrate probe rod into the seabed sediment with smaller penetration rate error under the condition of changing penetration resistance.

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Section: Design Of Controllermentioning

confidence: 99%

Model prediction controller for penetration mechanism of seabed cone penetration test system

Wang,

Ren,

Zhou

et al. 2023

J. Phys.: Conf. Ser.

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Development of an Underwater Adaptive Penetration System for In Situ Monitoring of Marine Engineering Geology

Sun,

Shan,

Wang

et al. 2024

Sensors

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In recent years, offshore wind farms have frequently encountered engineering geological disasters such as seabed liquefaction and scouring. Consequently, in situ monitoring has become essential for the safe siting, construction, and operation of these installations. Current technologies are hampered by limitations in single-parameter monitoring and insufficient probe-penetration depth, hindering comprehensive multi-parameter dynamic monitoring of seabed sediments. To address these challenges, we propose a foldable multi-sensor probe and establish an underwater adaptive continuous penetration system capable of concurrently measuring seabed elevation changes and sediment pore water pressure profiles. The reliability of the equipment design is confirmed through static analysis of the frame structure and sealed cabin. Furthermore, laboratory tests validate the stability and accuracy of the electrical and mechanical sensor measurements. Preliminary tests conducted in a harbor environment demonstrate the system’s effectiveness.

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Design and Application of a Deep-Sea Engineering Geology In Situ Test System

Cited by 2 publications

References 12 publications

Model prediction controller for penetration mechanism of seabed cone penetration test system

Model prediction controller for penetration mechanism of seabed cone penetration test system

Development of an Underwater Adaptive Penetration System for In Situ Monitoring of Marine Engineering Geology

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