Download e-book for kindle: Advances in Material Engineering and Mechanical Engineering by Edited by Liang Gao

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Disc Adapter Figure 1. Schematic of HDBS brake assembly Braking Performances of HDBS. The pressure variation of the HDBS is not linear to the braking time, especially at the beginning and the end of the adjusting process. While in the intermediate stage of braking process, the pressure is smoothly adjusting and has the excellent following character. So we can conclude that the performance of HDBS under open-loop controlling is poor, and a controller is needed to design to optimize the performances of HDBS during drilling processes.

The pressure variation of the HDBS is not linear to the braking time, especially at the beginning and the end of the adjusting process. While in the intermediate stage of braking process, the pressure is smoothly adjusting and has the excellent following character. So we can conclude that the performance of HDBS under open-loop controlling is poor, and a controller is needed to design to optimize the performances of HDBS during drilling processes. Due to the complex situation such as the formation conditions, bit wear, change of hydraulic parameters, the system has the features of time delay, non-linear and time varying.

Z. Q. Zhang: The Research of Multiaxial Intensity Test and Failure Criteria on Concrete, Beijing : Tsinghua university press,China,1996. com Keywords: Hydraulic Disc Brake System (HDBS), Automation, PWM, High Speed On/Off Valve, Optimizing Schemes. Abstract. With the development of oil exploration and electronics technology, the automation control technologies of hydraulic disc brake system (HDBS) have become more and more widely used. After analysis the braking performance of HDBS, The optimizing schemes for hydraulic disc brake, such as PWM high speed on/off valve and pressure switch are used in the constant weight auto-drilling system.

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Advances in Material Engineering and Mechanical Engineering by Edited by Liang Gao


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