Pump/valves coordinate control of the independent metering system for mobile machinery

This paper presents a control algorithm for a novel Mechatronics Electro-hydraulic Driving System, Micro-Independent Metering. The main idea of the independent metering is a separated control of the hydraulic actuator ports which are the meter-in and the meter-out. IM technique configuration relies upon different types of valves, especially on poppet valves. As these valves have stability limitations, a novel stepped rotary valve was developed to configure a novel IM form. This form is termed as micro-independent metering due to the activation technique of the valve. A novel algorithm was developed to control this new configuration. The algorithm implements the rules of the independent metering using the new valve. It is able to detect the different operation modes and make a real time changing between them. Also, it activates the enhanced performance technique which was especially developed for this new configuration. The paper includes the mathematical analysis of the developed algorithm and its State-flow representation. Also, it includes the simulation of the system performance, and the effect of MIM on the cylinder velocity.

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“…The LSRR happens when load is moving down using its gravity. The modes are shown in [20] are as follows:…”

Section: The Independent Metering Operating Modesmentioning

confidence: 99%

Algorithm Design for the Novel Mechatronics Electro-Hydraulic Driving System: Micro-Independent Metering

Abuowda

Noroozi

Dupac

et al. 2019

2019 IEEE International Conference on Mechatronics (ICM)

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“…В системі керування гідропривода мініекскавато-ра [11] давачі контролюють роботу регульованого на-сосу, запобіжно-переливного клапана, розподільників та двох виконавчих ланок у вигляді гідроциліндрів. Дослідженнями динамічних характеристик вихідної ланки визначено параметри розробленого контролера, за допомогою якого досягається оптимізація роботи всіх елементів гідропривода регулюванням траєкторії переміщення маніпулятора, потоку та тиску робочої рідини в гідросистемі.…”

Section: аналіз літературних даних та постановка проблемиunclassified

The research of the dynamic processes of control system of hydraulic drive of belt conveyors with variable cargo flows

Polishchuk¹,

Kharchenko²,

Piontkevych³

et al. 2016

EEJET

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“…with flow rate coefficient is enhanced. For inlet/outlet independently metering control of electrohydraulic system, Xu et al [67] proposed a three-level controller to improve the energy utilization efficiency of system. The upper level controller selects the appropriate operating mode by the requirement of load and command speed.…”

Section: Hierarchical Coordination Control Strategy Of Electro-hydraumentioning

confidence: 99%

Review on Inlet/Outlet Oil Coordinated Control for Electro-Hydraulic Power Mechanism under Sustained Negative Load

Liu

Dong

2018

Applied Sciences

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Speed control and smooth regulation in an electro-hydraulic motion control system under negative load (over-running load) are crucial to mobile machineries, vehicles, and motion simulation equipment. Problems, such as bad natural stability, bad dynamic performance for small adjusting signal, serious coupling, and difficulty to coordinate between speed smoothness and speed regulation, exist in traditional valve-controlled and pump-controlled electro-hydraulic power mechanism. The coordinated motion control scheme, which is based on independent regulation of inlet/outlet oil for electro-hydraulic power mechanism has attracted the attention of many scholars. In the last two decades, many progresses had been made in coordinated control technology, employing in inlet/outlet independent metering and pump/valves independent regulation. Moreover, the technology has been widely used in the electro-hydraulic operating system in hydraulic excavator and the speed smoothness control system in heavy transport vehicles. In this study, recent advancements and upcoming trends in coordinated control and inlet/outlet independent metering for electro-hydraulic power mechanism under sustained negative load are reviewed. Firstly, related research advancements are summarized, including flow rate regulation mechanism based on inlet/outlet coordinated control, coordinated control strategy and nonlinear control method of electro-hydraulic control system. Then, nonlinear modeling of inlet/outlet independent metering and pump/valves independent regulation in electro-hydraulic control system is presented. In addition, the electro-hydraulic speed smoothness control and energy recovery for heavy engineering vehicles under long down-slope is discussed and reviewed. Finally, existing problems and future trends of inlet/outlet coordinated control for an electro-hydraulic power mechanism under sustained negative load are presented.

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Pump/valves coordinate control of the independent metering system for mobile machinery

Cited by 71 publications

References 11 publications

Algorithm Design for the Novel Mechatronics Electro-Hydraulic Driving System: Micro-Independent Metering

Algorithm Design for the Novel Mechatronics Electro-Hydraulic Driving System: Micro-Independent Metering

The research of the dynamic processes of control system of hydraulic drive of belt conveyors with variable cargo flows

Review on Inlet/Outlet Oil Coordinated Control for Electro-Hydraulic Power Mechanism under Sustained Negative Load

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