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Energy-efficient control of a screw-drive pipe robot with consideration of actuator's characteristics.

Li P, Ma S, Lyu C, Jiang X, Liu Y - Robotics Biomim (2016)

Bottom Line: Nevertheless, the energy is limited for the whole inspection task and cannot keep the inspection time too long.We also propose a velocity selection strategy that includes the actual velocity capacity of the motor, according to the velocity ratio [Formula: see text], to keep the robot working in safe region and decrease the energy dissipation.This selection strategy considers three situations of the velocity ratio [Formula: see text] and has a wide range of application.

View Article: PubMed Central - PubMed

Affiliation: School of Mechanical Engineering and Automation, Harbin Institute of Technology Shenzhen Graduate School, ShenZhen, 518055 China ; Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Shatin, Hong Kong China.

ABSTRACT

Pipe robots can perform inspection tasks to alleviate the damage caused by the pipe problems. Usually, the pipe robots carry batteries or use a power cable draining power from a vehicle that has many equipments for exploration. Nevertheless, the energy is limited for the whole inspection task and cannot keep the inspection time too long. In this paper, we use the total input energy as the cost function and a more accurate DC motor model to generate an optimal energy-efficient velocity control for a screw-drive pipe robot to make use of the limited energy in field environment. We also propose a velocity selection strategy that includes the actual velocity capacity of the motor, according to the velocity ratio [Formula: see text], to keep the robot working in safe region and decrease the energy dissipation. This selection strategy considers three situations of the velocity ratio [Formula: see text] and has a wide range of application. Simulations are conducted to compare the proposed method with the sinusoidal control and loss minimization control (minimization of copper losses of the motor), and results are discussed in this paper.

No MeSH data available.


Related in: MedlinePlus

Efficiency of an armature-controlled DC motor. a Motor efficiency that considering  and , b motor efficiency that only considering
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Fig4: Efficiency of an armature-controlled DC motor. a Motor efficiency that considering and , b motor efficiency that only considering

Mentions: The above equations have shown the influence of , when calculating the motor efficiency. Moreover, using the above equations, the motor efficiency that is considering and and that of only considering is shown in Fig. 4 with the same parameters in Table 1. The reason of Fig. 4’s result is that considering and needs more electrical energy than that of only considering , when the motor working at a same combination of torque and velocity. The motor efficiency has decreased, when is considered.Fig. 4


Energy-efficient control of a screw-drive pipe robot with consideration of actuator's characteristics.

Li P, Ma S, Lyu C, Jiang X, Liu Y - Robotics Biomim (2016)

Efficiency of an armature-controlled DC motor. a Motor efficiency that considering  and , b motor efficiency that only considering
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4940445&req=5

Fig4: Efficiency of an armature-controlled DC motor. a Motor efficiency that considering and , b motor efficiency that only considering
Mentions: The above equations have shown the influence of , when calculating the motor efficiency. Moreover, using the above equations, the motor efficiency that is considering and and that of only considering is shown in Fig. 4 with the same parameters in Table 1. The reason of Fig. 4’s result is that considering and needs more electrical energy than that of only considering , when the motor working at a same combination of torque and velocity. The motor efficiency has decreased, when is considered.Fig. 4

Bottom Line: Nevertheless, the energy is limited for the whole inspection task and cannot keep the inspection time too long.We also propose a velocity selection strategy that includes the actual velocity capacity of the motor, according to the velocity ratio [Formula: see text], to keep the robot working in safe region and decrease the energy dissipation.This selection strategy considers three situations of the velocity ratio [Formula: see text] and has a wide range of application.

View Article: PubMed Central - PubMed

Affiliation: School of Mechanical Engineering and Automation, Harbin Institute of Technology Shenzhen Graduate School, ShenZhen, 518055 China ; Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Shatin, Hong Kong China.

ABSTRACT

Pipe robots can perform inspection tasks to alleviate the damage caused by the pipe problems. Usually, the pipe robots carry batteries or use a power cable draining power from a vehicle that has many equipments for exploration. Nevertheless, the energy is limited for the whole inspection task and cannot keep the inspection time too long. In this paper, we use the total input energy as the cost function and a more accurate DC motor model to generate an optimal energy-efficient velocity control for a screw-drive pipe robot to make use of the limited energy in field environment. We also propose a velocity selection strategy that includes the actual velocity capacity of the motor, according to the velocity ratio [Formula: see text], to keep the robot working in safe region and decrease the energy dissipation. This selection strategy considers three situations of the velocity ratio [Formula: see text] and has a wide range of application. Simulations are conducted to compare the proposed method with the sinusoidal control and loss minimization control (minimization of copper losses of the motor), and results are discussed in this paper.

No MeSH data available.


Related in: MedlinePlus