Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Open and closed-loop control systems

Open and closed-loop control systems

Control systems are foundational elements in automation and engineering. They are broadly categorized into open-loop and closed-loop systems. These classifications hinge on the presence or absence of feedback mechanisms, significantly influencing the system's performance, complexity, and application.
An open-loop control system operates without feedback from the output. It consists of two primary elements: the controller and the controlled process. The controller receives an input signal...

Multi-input and Multi-variable systems

Multi-input and Multi-variable systems

Cruise control systems in cars are designed as multi-input systems to maintain a driver's desired speed while compensating for external disturbances such as changes in terrain. The block diagram for a cruise control system typically includes two main inputs: the desired speed set by the driver and any external disturbances, such as the incline of the road. By adjusting the engine throttle, the system maintains the vehicle's speed as close to the desired value as possible.
In the absence...

Control Systems: Applications

Control Systems: Applications

Electrical engineering plays a pivotal role in our daily lives, with control systems at the heart of many applications, from home appliances to sophisticated space shuttles. Control systems manage and regulate the behavior of devices and processes, ensuring they function safely, correctly, and efficiently.
In modern vehicles, control systems manage various functions to enhance performance and safety. The steering wheel and accelerator are primary inputs in a car's control system. The...

PD Controller: Design

PD Controller: Design

In automotive engineering, car suspension systems often employ Proportional Derivative (PD) controllers to enhance performance. PD controllers are utilized to adjust the damping force in response to road conditions. A controller, acting as an amplifier with a constant gain, demonstrates proportional control, with output directly mirroring input.
Designing a continuous-data controller requires selecting and linking components like adders and integrators, which are fundamental in Proportional,...

Root-Locus Method

Root-Locus Method

A cruise control system in a car is designed to maintain a specified speed automatically by adjusting the gas pedal. The system continuously measures the vehicle's speed and makes fine adjustments to the pedal to achieve this goal. The root locus method is particularly useful for understanding how the cruise control system's behavior changes under varying conditions, such as when the car goes uphill, downhill, or faces strong wind resistance.
This system can be represented by a block...

Load-frequency control

Load-frequency control

Load-frequency control (LFC) is vital for maintaining power system stability, ensuring that frequency and power flows remain within acceptable limits during load changes. Turbine-governor control eliminates rotor accelerations and decelerations following load changes. However, a steady-state frequency error persists when the change in the turbine-governor reference setting is zero. In an interconnected power system, each area agrees to export or import a scheduled amount of power through...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

SECTOR: structural entropy-based learning of spatiotemporal organisation in spatial transcriptomics.

Bioinformatics (Oxford, England)·2026

Same author

β-Catenin Does Not Co-activate Vitamin D Receptor-mediated Transcription in Osteoblastic and Non-osteoblastic Cells.

Bioscience, biotechnology, and biochemistry·2026

Same author

Supramolecular coordination nanoplatform amplifies oxidative stress to overcome ferroptosis resistance in gallbladder cancer.

Journal of nanobiotechnology·2026

Same author

Immune cell subsets linking insomnia trajectories and incident cognitive impairment: a prospective cohort study.

BMC medicine·2026

Same author

Genome-wide identification of the MYB gene family and identification of candidate genes that involved in anthocyanin synthesis in cowpea (Vigna unguiculata [L.] Walp).

BMC plant biology·2026

Same author

Dual-channel optogenetics in yeast for multiplexed light-based control of cellular processes and pathways.

Nature communications·2026

Search research articles

Related Experiment Video

Updated: May 12, 2025

Modeling and Experimental Analysis of the Single-Shaft Coaxial Motor-Pump Assembly in Electrohydrostatic Actuators

Modeling and Experimental Analysis of the Single-Shaft Coaxial Motor-Pump Assembly in Electrohydrostatic Actuators

Published on: June 13, 2022

Dual-variable control load-sensing system for multi-way valves in hilly and mountainous tractors.

Yiwei Wu^1,2, Yuzhen Ruan¹, Jingyun Zhang^1,2

¹Henan University of Science and Technology, College of Vehicle and Traffic Engineering, Luoyang, China.

|May 8, 2025

Summary

A new dual-variable load sensing system for tractor multi-way valves improves energy efficiency by up to 50%. This advanced hydraulic system reduces pressure loss and ensures stable operation in hilly terrains.

More Related Videos

Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator

Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator

Published on: October 28, 2022

The Modular Design and Production of an Intelligent Robot Based on a Closed-Loop Control Strategy

The Modular Design and Production of an Intelligent Robot Based on a Closed-Loop Control Strategy

Published on: October 14, 2017

Related Experiment Videos

Last Updated: May 12, 2025

Modeling and Experimental Analysis of the Single-Shaft Coaxial Motor-Pump Assembly in Electrohydrostatic Actuators

Modeling and Experimental Analysis of the Single-Shaft Coaxial Motor-Pump Assembly in Electrohydrostatic Actuators

Published on: June 13, 2022

Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator

Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator

Published on: October 28, 2022

The Modular Design and Production of an Intelligent Robot Based on a Closed-Loop Control Strategy

The Modular Design and Production of an Intelligent Robot Based on a Closed-Loop Control Strategy

Published on: October 14, 2017

Area of Science:

Agricultural Engineering
Hydraulic Systems
Control Systems

Background:

Tractor multi-way valves face challenges like pressure loss and flow mismatch, especially in hilly terrains.
Existing systems struggle with efficiency and stable pressure delivery under varying loads.

Purpose of the Study:

To develop a load-independent flow distribution system for tractor multi-way valves.
To enhance energy efficiency and operational stability in demanding agricultural environments.

Main Methods:

Developed a dual-variable load sensing system integrating electro-hydraulic load-sensing pump and independent flow distribution.
Utilized AMESim software for component modeling and system simulation.
Implemented a load-sensitive variable pump with pressure differential and displacement detection, plus post-compensation and electro-hydraulic proportional valve.

Main Results:

Achieved average energy savings of 20%, up to 50% under optimal conditions.
Maintained pressure fluctuations at the valve port within a 5% margin.
Demonstrated significant improvements in energy efficiency and operational effectiveness.

Conclusions:

The dual-variable load sensing system effectively addresses pressure loss and flow mismatch in tractor multi-way valves.
This technology provides a reliable framework for optimizing hydraulic systems in agricultural machinery for hilly and mountainous regions.