Vibration and Deflection Behavior of a Coal Auger Working Mechanism

Liu, Songyong; Ji, Huifu; Cui, Xinxia

doi:10.1155/2016/6493859

Cited by 2 publications

(3 citation statements)

References 16 publications

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“…Thus, the external disturbances and deviation position data cannot be collected in real time. To solve this problem, we carried out some related experiments [2] on the ground in the early stage and obtained relevant experimental data that can be applied to the experimental prototype to replace the downhole operation environment. This can ensure the reliability of the data.…”

Section: Tracking Performance With Prototype Experimentsmentioning

confidence: 99%

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Position Deviation Control of Drilling Machine Using a Nonlinear Adaptive Backstepping Controller Based on a Disturbance Observer

Liu

2021

Processes

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Thin coal seam mining is a development direction to solve the problem of energy supply at this stage, which cannot be realized by small working space, low automation, and drilling deviation. In this paper, a nonlinear adaptive backstepping controller based on a disturbance observer is proposed and used on a coal auger for position tracking control to achieve directional drilling. Firstly, a nonlinear dynamic model for the deflection control mechanism is built with the consideration of parameter uncertainties and external disturbances. Then, the parameter uncertainty and external disturbance are regarded as a system compound disturbance. Furthermore, a disturbance observer is designed to estimate the system compound disturbance and a nonlinear adaptive backstepping controller was proposed to compensate the system compound disturbance. The upper bound of the compound disturbance, which can effectively reduce the chattering in the directional control process, cannot be obtained easily. A stability analysis of the DCM (deviation control mechanism) with the proposed controller is proved based on the Lyapunov theory. Finally, an electro-hydraulic servo displacement control experimental system with matlab xPC target rapid prototyping technology and a prototype experiment system is established to verify the effectiveness of the proposed control strategy. The experimental results indicate that the proposed controller can yield more satisfactory position tracking performance, such as parameter uncertainties and external disturbances, than the conventional proportion integral derivative (PID) controller and an adaptive backstepping controller. Using the control strategy, technical breakthrough on horizontal directional drilling can be realized for thin coal seam mining.

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Section: Tracking Performance With Prototype Experimentsmentioning

confidence: 99%

“…The coal auger is a new type of thin seam mining equipment that has extensive prospects thanks to its characteristics of unmanned and non-supported coal face mining. Recently, a new type of coal auger working mechanism with five bits was used for further improving coal mining efficiency [1,2]. The drilling technology is shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Position Deviation Control of Drilling Machine Using a Nonlinear Adaptive Backstepping Controller Based on a Disturbance Observer

Liu

2021

Processes

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“…Considering the collision conditions of the drill rod and rock, the interacted system coupling dynamics model of multidrilling mechanism and rock was built, and the vibration was acquired under different compression strength of rocks and different rotational speeds of drill [9]. A new fivebit coal auger working mechanism test model was established to explore the influence factor on vibration and deflection under different conditions and a simulation model was built to further research the effect of partial load and stabilizer arrangement [10]. The dynamic analysis of a microdrill was investigated under ultrasonic vibration (50 kHz) excited with a piezoelectric-driven actuator experimentally and numerically by using finite element analysis [11].…”

Section: Introductionmentioning

confidence: 99%

Drilling Performance of Rock Drill by High-Pressure Water Jet under Different Configuration Modes

Liu

Chang

2017

Shock and Vibration

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In the rock drilling progress, the resistant force results in tools failure and the low drilling efficiency; thus, it is necessary to reduce the tools failure and enhance the drilling efficiency. In this paper, different configuration modes of drilling performance assisted with water jet are explored based on the mechanism and experiment analysis of rock drilling assisted with water jet. Moreover, the rotary sealing device with high pressure is designed to achieve the axial and rotation movement simultaneously as well as good sealing effect under high-pressure water jet. The results indicate that the NDB and NFB have better effects on drilling performance compared with that of NSB. Moreover, the high-pressure water jet is helpful not only to reduce the drill rod deflection, but also to reduce the probability of drill rod bending and improve the drill rod service life.

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Vibration and Deflection Behavior of a Coal Auger Working Mechanism

Cited by 2 publications

References 16 publications

Position Deviation Control of Drilling Machine Using a Nonlinear Adaptive Backstepping Controller Based on a Disturbance Observer

Position Deviation Control of Drilling Machine Using a Nonlinear Adaptive Backstepping Controller Based on a Disturbance Observer

Drilling Performance of Rock Drill by High-Pressure Water Jet under Different Configuration Modes

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