Model Predictive Control of a Hydraulic Multichamber Actuator: A Feasibility Study

The energy efficiency of hydraulic cylinder drives can be increased by replacing the actuator with a multi-chamber cylinder, utilising multiple supply lines with unique pressures or a combination of the concepts. Previous studies have demonstrated significant energy savings using a cascaded control system, which requires velocity feedback to stabilise the system. To avoid the need of position or velocity sensors in harsh conditions of mobile machines, this article presents a throttling control scheme, which achieves good energy efficiency on multi-pressure systems without velocity feedback. A simulation study was performed to determine the efficiency of the system, robustness against load variations and the effect of valve response time on performance.

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“…Therefore, the controller should be capable of finding an optimum balance between the two types of energy losses. 16…”

Section: Controller Designmentioning

confidence: 99%

“…Some studies have been conducted to improve the force resolution of the actuator by introducing valve systems capable of adjusting the pressure drop. 15–17 All studies listed, excluding Huova et al, 15 examined the force control of the actuator. In certain studies, a position control loop was built around the force controller.…”

Section: Introductionmentioning

confidence: 99%

Energy efficient throttling control of a multi-pressure system using a genetic algorithm and model predictive control

Huova

Linjama

2021

Proceedings of the Institution of Mechanical Engineers, Part I:

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“…The optimal control approach to achieve energy efficiency and force tracking performance was proposed by Heybroek et al [15] for the control of EHA. This study implemented a simplified model of the system for control purposes.…”

Section: Introductionmentioning

confidence: 99%

“…Generally, several approaches have been proposed for the adaptive control of different systems. In [15], an output feedback control scheme was developed with the help of an unknown dynamic estimator to overcome the existing problems in previous adaptive control designs. Mostly, the traditional adaptive schemes can be classified as the designs using back-stepping or dynamic surface control or the designs using intelligent approximation-based controls such as neural networks or fuzzy logic control.…”

Section: Introductionmentioning

confidence: 99%

Adaptive Predictive Control for Torque Applying System of High-powered Test Rig

Parvaresh

Mardani

2021

Scientia Iranica

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This paper proposes the implementation of a novel predictive control scheme known as adaptive generalized predictive control (AGPC) in the actuation system of a high-powered test rig. Through the use of actuation system, the required torque for simulating different conditions can be applied to the tested gearboxes. The accurate and precise control of this system is of great importance as it affects the overall performance of the test rig. The considered actuation system in this investigation is electro-hydraulically driven with nonlinear and uncertain characteristics.The performance of the proposed control scheme in different conditions of the parametric uncertainty as well as presence of disturbances are evaluated and the results are discussed. The results confirmed the superior performance of the proposed scheme in different studied conditions.

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“…In [6] the authors present a model predictive control strategy for a four-chamber actuator connected to a common pressure rail through proportional valves, a Variable Displacement Linear Actuator (VDLA). It is similar to the concept presented in [1] except for the use of proportional valves which allow throttling control between the different force levels, resulting in smoother control while still maintaining high efficiency.…”

Section: Introductionmentioning

confidence: 99%

Improving the efficiency of valve-controlled systems by using multi-chamber actuators

Raduenz¹,

Ericson²,

Heybroek³

et al. 2021

Linköping Electronic Conference Proceedings

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This paper outlines how multi-chamber actuators can improve the efficiency of valve-controlled systems. Resistive control is a major source of energy losses in valve-controlled systems that share the same pump to drive multiple loads. In the proposed concept, by selecting different chambers, the load on the multi-chamber actuator can be transformed into different pressure and flow rate levels, allowing the adaptation of its load to the loads on other actuators. This can lead to a reduction of resistive control energy losses that occur between pump and actuators when driven simultaneously. Such systems are seen as an intermediate solution between resistive conventional hydraulics and throttle-less digital hydraulics. As a case study to highlight the possible efficiency improvement, a concept of a load sensing system with a conventional and a multi-chamber actuator is analysed. To determine its efficiency, the equations that describe its static behaviour are presented. Evaluating them for a set of load forces and speeds demonstrates how the load transformation occurs and how it can improve efficiency.

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Model Predictive Control of a Hydraulic Multichamber Actuator: A Feasibility Study

Cited by 19 publications

References 7 publications

Energy efficient throttling control of a multi-pressure system using a genetic algorithm and model predictive control

Energy efficient throttling control of a multi-pressure system using a genetic algorithm and model predictive control

Adaptive Predictive Control for Torque Applying System of High-powered Test Rig

Improving the efficiency of valve-controlled systems by using multi-chamber actuators

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