Relevant bibliographies by topics / Mobile hydraulic machine

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Mobile hydraulic machine'

Author: Grafiati
Published: 4 June 2021
Last updated: 6 February 2022

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Journal articles on the topic "Mobile hydraulic machine"

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Sidorenko, V. S., V. I. Grishchenko, S. V. Rakulenko, M. S. Poleshkin, and D. D. Dymochkin. "Study on oil pilot circuit of adaptive hydraulic drive of tool advance in mobile drilling machine." Vestnik of Don State Technical University 19, no. 1 (April 1, 2019): 13–23. http://dx.doi.org/10.23947/1992-5980-2019-19-1-13-23.

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Introduction. An adaptive hydraulic drive of the tool advance in a mobile drilling machine is studied on the example of the URB-2.5 installation. A typical technological cycle of the mobile drilling machine is considered; the performance criteria are defined. An original design of the adaptive hydraulic drive is proposed on the basis of the analysis. Adaptation of the hydraulic drive of the tool advance is carried out using an adjustable volumetric hydraulic motor with a hydraulic control circuit under discontinuous loads on the tool during the drilling process.Materials and Methods. Through a preliminary computational experiment in the Matlab Simulink program, the following parameters of the control loop devices were determined: a hydromechanical sensor and a hydraulically controlled valve, on the basis of which the experimental setup was implemented. The performed multifactor experiment allowed identifying the processes in the original hydraulic control circuit of the hydraulic motor under various modes of tool loading.Research Results. The kinematic and power characteristics of the hydromechanical system of a mobile drilling rig, the hydraulic control effect on the settings of the hydraulic control circuit devices were obtained and determined. The results enabled to specify the rational ranges of the hydromechanical system operation for a typical work cycle.Discussion and Conclusions. The results obtained can be used to create hydraulic systems of new drilling machines with various characteristics. The application of the developed techniques of research and processing of their results will reduce the time and costs involved in designing adaptive hydraulic systems for mobile technological machines, creating prototypes and conducting commissioning procedures.
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Temirkanov-, Alan, and Aleksandr Ribak-. "Theoretical studies of synchronous hydraulic drive mobile machine." Актуальные направления научных исследований XXI века: теория и практика 3, no. 9 (December 22, 2015): 382–86. http://dx.doi.org/10.12737/16950.

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Abo-Shanab, R. F., and N. Sepehri. "Tip-Over Stability of Manipulator-Like Mobile Hydraulic Machines." Journal of Dynamic Systems, Measurement, and Control 127, no. 2 (June 1, 2004): 295–301. http://dx.doi.org/10.1115/1.1898239.

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This paper describes the development of a simulation model for studying the tip-over stability of a typical heavy-duty hydraulic log-loader machine. The model takes into account the dynamics of (i) the base that can potentially rock back and forth, (ii) the combined vehicle suspension and ground/tire compliance, (iii) the friction between the tires and the ground, and (iv) the hydraulic actuators’ functions. The results demonstrate the effects of the manipulator movements, the flexibility of the contact between the base and the ground, the hydraulic compliance, and the friction properties between the wheels and the ground, on the stability of the machine. Particularly, it is shown that the flexibility of the contact between the base and the ground reduces the machine stability, whereas the flexibility at the manipulator joints due the hydraulic compliance improves the machine stability.
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Kałaczyński, Tomasz, Valeriy Martynyuk, Juliy Boiko, Sergiy Matyukh, and Svitlana Petrashchuk. "Exploitation aspects of diagnostic hydraulic and pneumatic systems of Multimedia Hybrid Mobile Stages." MATEC Web of Conferences 332 (2021): 01022. http://dx.doi.org/10.1051/matecconf/202133201022.

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Knowledge of the technical state and construction of the hydraulic and pneumatic control system of Multimedia Hybrid Mobile Stage HMSM allows you to identify hazards and make a risk assessment. The aspects of the algorithmic process of diagnosing pneumatic and hydraulic control systems presented in the work form the basis for the development and implementation of safe solutions in the process of operation. This article describes the methodology for diagnosing HMSM machine hydraulics and industrial pneumatics systems, detailing the factors determining the correctness of maintaining functional fitness. The considerations developed illustrate the complexity of the diagnostic testing design process for condition assessment.
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Ghasempoor, A., and N. Sepehri. "A Measure of Stability for Mobile Manipulators With Application to Heavy-Duty Hydraulic Machines." Journal of Dynamic Systems, Measurement, and Control 120, no. 3 (September 1, 1998): 360–70. http://dx.doi.org/10.1115/1.2805410.

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This paper describes the development of a suitable algorithm to compute the potential of tipping-over for vehicles that carry manipulators. The energy method developed by Messuri and Klein (1985) is extended here to quantitatively reflect the effect of forces and moments arising from the manipulation of the implement. The amount of the impact energy that can be sustained by the vehicle without tipping-over, about each edge of potential overturning is computed. First, the instantaneous onset of instability configuration of the machine about the edge is determined by constructing an equilibrium plane. Next, the work done by all acting forces and moments when the machine is virtually brought to this unstable stance from the current state, is calculated. This work is the indication of the proximity of the machine to tipping-over around that edge. The application of this study is directed at industrial mobile machines that carry human-operated hydraulic manipulators. The algorithm is therefore used to study the stability of an excavator based log-loader. Simulation studies clearly show the importance of inertial loads in determining the stability of such machines.
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Puzanov, A. V. "Transdisciplinary models of hydraulic drives of mobile machinery." «System analysis and applied information science», no. 4 (February 6, 2019): 51–55. http://dx.doi.org/10.21122/2309-4923-2018-4-51-55.

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Modern drive engineering requires a comprehensive analysis of all work processes in hydraulic drives, solving the problems of modeling the technological processes of their production using mathematical and software tools of various physicality.The article proposes an approach to the development of hydrodrives of mobile equipment based on transdisciplinary models of instruments and control systems. These models are designed to unite in a single information space a methodical and mathematical apparatus of various physicality: mechanics, kinematic, hydromechanics, heat engineering, and methods for their solution. These measures will increase their adequacy, reduce assumptions and reduce the safety factor as a measure of imperfection of the scientific and technical understanding of the facility.The article gives an example of the use of this approach in the development of volumetric hydraulic drives of mobile equipment a technique for calculating the indicator diagram of an axial-plunger hydraulic machine at a micro level using the Matlab / Simulink, Autodesk Simulation CFD and Autodesk Simulation Mechanical software complexes. The indicator diagram of the hydraulic machine is a clear characteristic of the dynamic qualities of the product. From the correctness of the calculation of this characteristic, the dynamic properties, reliability and resource of the drive as a whole depend.
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KARHU, Otso, Jarno UUSISALO, Janne HONKAKORPI, and Kalevi HUHTALA. "AUTONOMOUS EXCAVATION USING HYDRAULIC MOBILE MACHINE RETROFITTED WITH ELECTRONIC CONTROL SYSTEM." Proceedings of the JFPS International Symposium on Fluid Power 2008, no. 7-2 (2008): 359–62. http://dx.doi.org/10.5739/isfp.2008.359.

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Goto, Hiroyuki, Yutaka Tanaka, and Ken Ichiryu. "3D Tube Forming and Applications of a New Bending Machine with Hydraulic Parallel Kinematics." International Journal of Automation Technology 6, no. 4 (July 5, 2012): 509–15. http://dx.doi.org/10.20965/ijat.2012.p0509.

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This research presents a new versatile bending machine and its practical applications. The proposed machine uses a new method. When tubes are fed into the fixed and mobile dies, they are bent by shifting the relative position of the mobile die. The bending radius is controlled by the relative distance and orientation between the mobile die and the tube. The bending angle is controlled by the length of the fed tube. This forming process has a big advantage. A change in the expected bending shape will need no change in the tooling system but only a new definition of the motion of the active die and the length of the fed tube. Active die movements are controlled by a 6-DOF Parallel KinematicsMechanism (PKM) with a hydraulic servo drive. Making use of the hydraulic PKM serves not only to achieve a complete motion along six axes but also to obtain the high dynamic motion of the bending machine. Application examples show that the bending machine can be applied to a designer’s furniture and universal designed products. Until now, these processes have been difficult to achieve using a conventional bending machine.
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Rybak, Alexander, and I. Tsibriy. "Simulation of the pump-battery power supply control system based on the unloading machine." E3S Web of Conferences 164 (2020): 01004. http://dx.doi.org/10.1051/e3sconf/202016401004.

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The aim of this article is to create a control system for a constant hydraulic power source pressure, a pump -battery power source equipped with an original design of the hydraulic pump discharge machine that provides relay switching of its operation mode. This aim is achieved by using a simulation method based on the application of volumetric stiffness theory of hydraulic systems and their elements. As a result of a numerical experiment conducted by solving the equations that make up the mathematical model of power supply, its main technical characteristics and the influence of its main design parameters on its functional features and operational properties are obtained. The obtained results showed that by changing the various design parameters of unloading machine, it is possible not only to change the upper (maximum) and lower (minimum) values of the battery charging pressure, but also to adjust their difference depending on the requirements for the power source. The main result of this study is that as a result of a numerical experiment, it is proved that the unloading machine provides a clear relay switching of the pump operation mode from unloading to operating mode and Vice versa. The identified properties make a very promising use of a pump -battery power source in the hydraulic systems of mobile machines and process equipment.
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Pershin, V. A., and T. A. Khinikadze. "TECHNIQUE OF FUNCTIONAL UNIFICATION OF ADAPTIVE HYDRAULIC DRIVE MODULE CAPABLE OF LOAD STABILIZATION ON THE WORKING BODY OF MOBILE MACHINES." Vestnik of Don State Technical University 18, no. 3 (September 29, 2018): 318–25. http://dx.doi.org/10.23947/1992-5980-2018-18-3-318-325.

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Introduction. Issues on the functional unification of the adaptive hydraulic drive module are studied. For the first time, self-adapting mechanisms are considered taking into account adaptive intercommunication of the load control and agreement of motions on the working body of the mobile machines. The work objective is to create and analyze the technique of the functional unification of the adaptive hydraulic drive module. In the furtherance of this goal, a number of tasks are solved. The selection of technical equipment – unified adaptive hydraulic drive modules of the mobile machines – is validated. The methodology and indicators of the module functional unification are described. Intercommunications are considered: direct positive and back negative ones. Their effect on the functional unification property of the adaptive module is shown.Materials and Methods. For the synthesis and analysis of the functional unification indicators of the adaptive module, a similarity method of the technical systems operation is adopted.Research Results. Techniques for structural-functional unification of the self-adapting modules are developed. Optional versions of the unified modules modification and proper combinations of hydraulic motors, regulating equipment, and mathematical models of adaptive communications are presented. Criteria and indicators of similarity are proposed. The functional unification of the adaptive intercommunications of the module and different types of the hydraulic motors and fluid throttling elements in the hydraulic system are analyzed. Recommendations for implementing the functional unification under typing and operation (adjustment) of the adaptive module are formulated.Discussion and Conclusions. The methodology is recommended for the functional unification of the hydraulic self-adapting module. It can be used for the development of unit sizes and under its operation as an independent drive or a hydraulic drive subsystem of a multifunctional or combined machine.
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Dissertations / Theses on the topic "Mobile hydraulic machine"

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Frerichs, Ludger, and Karl Hartmann. "Efficient and high performing hydraulic systems in mobile machines." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-200364.

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Hydraulic systems represent a crucial part of the drivetrain of mobile machines. The most important drivers of current developments, increasing energy efficiency and productivity, are leading to certain trends in technology. On a subsystem level, working hydraulics are utilizing effects by improving control functions and by maximum usage of energy recovery potential. Independent metering and displacement control, partly in combination with hybrid concepts, are the dominating approaches. Traction drives gain advantage from optimized power split transmissions, which consequently are being used in a growing number of applications. On the level of components, increase of efficiency and dynamics as well as power density are important trends. Altogether, design of systems and components is more and more based on modular concepts. In this sense, among others, sensors and control elements are being integrated to actuators; electric and hydraulic technology is being merged. In order to achieve maximum efficiency and performance of the entire machine, control of hydraulics has to include the whole drivetrain and the entire mobile machine in its application. In modern words, mobile hydraulic systems are a part of cyber physical systems.
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Lodewyks, Johann, and Pascal Zurbrügg. "Decentralized energy-saving hydraulic concepts for mobile working machines." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-199996.

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The high price of batteries in working machines with electric drives offer a potential for investment in energy-saving hydraulic systems. The decentralized power network opens up new approaches for hydraulic- and hybrid circuits. In addition, the regeneration of energy can be used at any point of the machine. For the example of an excavator arm drive with a double cylinder two compact hydraulic circuits are presented, which relieve a central hydraulic system.
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Kilic, Boran. "Dynamic Modelling Of A Backhoe-loader." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/12611002/index.pdf.

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The aim of this study is to develop a dynamic model of the loader system of a backhoe-loader. Rigid bodies and joints in the loader mechanism and loader hydraulic system components are modelled and analyzed in the same environment using the physical modelling toolboxes inside the commercially available simulation software, MATLAB/Simulink. Interaction between the bodies and response of the hydraulic system are obtained by co-operating the mechanical and hydraulic analyses. System variables such as pressure, flow and displacement are measured on a physical machine and then compared with the simulation results. Simulation results are consistent with the measurement results. The main result of this work is the ability to determine the dynamic loads on the joints and attachments of the backhoe-loader. In addition to that, prototyping time and costs can be highly reduced by implementing this model in the design process.
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Düsing, Christa, and David Prust. "Supplementary failure mode and effect analysis (FMEA) for safety application standards DIN EN ISO 13849 safety function-fmea." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71272.

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In the automotive industry, the Safety Function-FMEA according to ISO 26262 and its application to functional safety relevant systems is a well-established process in the form of Automotive Safety Integrity Levels (ASILs). These represent the failure mitigation that must be applied to ensure an acceptable residual risk of malfunctioning behaviour. The DIN EN ISO 13849 (ISO 13849) already describes a process to reduce risks for machines which starts with a Hazard And Risk Analysis (HARA) as described in DIN EN ISO 12100 and concludes with the Safety Requirements Specification (SRS). The SRS is a functional and technical safety concept defining requirements and guidelines to make sure the design conforms to defined safety goals. ISO 13849 lists important faults and failures for various technologies. The defined Safety Functions (SFs) can be classified in corresponding categories that lead to the particular hardware/system structure. This applies to mechatronic systems consisting of at least one sensor, one control unit and one actuator to monitor the system and effect a response in case of failure. Compared to the methods described in ISO 13849, the Safety Function-FMEA allows systematic identification of additional failures resulting from combinations of effects, rather than only listing the main failure causes. Based on the complexity of the machines it is highly recommended to perform a Safety Function-FMEA as a complementary method to assess and improve the overall safety of machinery.
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Minav, Tatiana, Luca Papini, and Matti Pietola. "A Thermal Analysis of Direct Driven Hydraulics." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-200125.

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This paper focuses on thermal analysis of a direct driven hydraulic setup (DDH). DDH combines the benefits of electric with hydraulic technology in compact package with high power density, high performance and good controllability. DDH enables for reduction of parasitic losses for better fuel efficiency and lower operating costs. This one-piece housing design delivers system simplicity and lowers both installation and maintenance costs. Advantages of the presented architecture are the reduced hydraulic tubing and the amount of potential leakage points. The prediction of the thermal behavior and its management represents an open challenge for the system as temperature is a determinant parameter in terms of performance, lifespan and safety. Therefore, the electro-hydraulic model of a DDH involving a variable motor speed, fixed-displacement internal gear pump/motors was developed at system level for thermal analysis. In addition, a generic model was proposed for the electric machine, energy losses dependent on velocity, torque and temperature was validated by measurements under various operative conditions. Results of model investigation predict ricing of temperature during lifting cycle, and flattened during lowering in pimp/motor. Conclusions are drawn concerning the DDH thermal behavior.
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Krüßmann, Martin, and Karin Tischler. "Complexity Management to design and produce customerspecific hydraulic controls for mobile applications." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-200692.

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Complexity management is the key to success for mobile machinery where the variety of customers and applications requires individual solutions. This paper presents the way Bosch Rexroth supports each OEM with hydraulic controls – from specification and conception towards application and production. It gives examples how platforms and processes are optimized according to the customer needs. The demand for flexible, short-term deliveries is met by an agile production with the technologies of Industry 4.0.
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Mazloumpour, Mohammad E. "Energy Consumption and Dynamic Behaviour Analyses in Single-Rod Hydraulic Actuation of Mobile Machines." 2014. http://hdl.handle.net/1993/23134.

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This thesis investigates the performance of single-rod hydraulic actuation of mobile machines. The performance is evaluated by studying the energy consumption and the dynamic performance of such actuation systems. Presently, valve-controlled systems control actuators of mobile machines. However, they are inefficient in terms of energy consumption. Therefore, low-energy consumption pump-controlled systems have been proposed. This thesis studies the energy consumption of pump-controlled systems developed by Wendell and Rahmfeld-Ivantysynova and valve-controlled systems. This thesis also compares the dynamic performance of the above pump-controlled systems with the load sensing valve-controlled system. A set of evaluation tests is conducted on single-rod hydraulic actuations that are simulated using the Automation Studio® software. Based on a cycle test, the energy consumption of Wendell’s pump-controlled system is 60% lower than that of the load sensing system. However, the above pump-controlled system leads to the poor dynamic behavior of a single-rod cylinder.
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Zhu, Ming. "Master-slave force-reflecting resolved motion control of hydraulic mobile machines." Thesis, 1994. http://hdl.handle.net/2429/3514.

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Issues concerning the design and implementation of master-slave force-reflecting resolved motion control of hydraulic mobile machines are addressed in this thesis. Network concepts and linear system theory are used to design and analyze general force-reflecting teleoperator systems to achieve high performance while maintaining stability. A new control structure is proposed to achieve "transparency" for teleoperator systems under rate control. A novel approach to stability analysis of the stiffness feedback strategy proposed in previous work is provided which, under certain condition, guarantees global asymptotic stability of the teleoperator system. The system could be either under rate or position control and could be subject to time-delays, nonlinearities or active environments. The closed-form inverse kinematics solutions of an excavator and a feller-buncher, which are four and five degree-of-freedom manipulators respectively, are provided to achieve resolvedmotion of the manipulator's end-effector. Using the UBC magnetically levitated joystick, the master-slave force-reflecting resolved motion control has been successfully implemented on a CAT-215 excavator and a CAT-325 feller-buncher. Machine experiments demonstrate the effectiveness of this control strategy in improving productivity and safety of general hydraulic mobile machines.
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Ghasempoor-Nobandgany, Ahmad. "A measure of stability for mobile manipulators with application to heavy-duty hydraulic machines." 1995. http://hdl.handle.net/1993/17611.

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Abo-Shanab, Roshdy Foaad Abdrabo. "Dynamic modeling and stability analysis of mobile manipulators with application to heavy duty hydraulic machines." 2003. http://hdl.handle.net/1993/19813.

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Books on the topic "Mobile hydraulic machine"

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Hydraulics in mobile equipment. Warrendale, PA: SAE Society of Automotive Engineers, 2001.

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Modern diesel technology: Mobile equipment hydraulics : a systems and troubleshooting approach. Clifton Park, N.Y: Delmar Learning, 2011.

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Productivity improvement in mobile equipment: Hydraulic trends. Warrendale, Pa: Society of Automotive Engineers, 1985.

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Michael, Oppermann. A new approach for failure prediction in mobile hydraulic systems. Düsseldorf: VDI, 2007.

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Mobile hydraulic technology. 2nd ed. Cleveland, OH: Parker Hannifin Corporation, 1999.

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Productivity Improvement in Mobile Equipment: Hydraulic Trends (S P (Society of Automotive Engineers)). Society of Automotive Engineers Inc, 1985.

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Fluid power for mobile, in-plant, field and manufacturing. Warrendale, PA: Society of Automotive Engineers, 2007.

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Engineers, Society of Automotive, and Commercial Vehicle Engineering Congress and Exhibition (2006 : Chicago, Ill.), eds. Fluid power for mobile, in-plant, field and manufacturing. Warrendale, PA: Society of Automotive Engineers, 2006.

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Book chapters on the topic "Mobile hydraulic machine"

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Nakazato, Y., Y. Sonobe, and S. Toyama. "Development of In-Pipe Micro Mobile Robot Using Peristalsis Motion Driven by Hydraulic Pressure." In Mechanisms and Machine Science, 23–29. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-2721-2_3.

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Rakulenko, S. V., V. I. Grishchenko, and M. S. Poleshkin. "Amplitude–Frequency Method of Control of a Mobile Drilling Machine with Hydraulic Drive with Dependent Tool Advance." In Proceedings of the 4th International Conference on Industrial Engineering, 331–39. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-95630-5_36.

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Minav, Tatiana A., Jani E. Heikkinen, and Matti Pietola. "Electric-driven Zonal Hydraulics in Non-Road Mobile Machinery." In New Applications of Electric Drives. InTech, 2015. http://dx.doi.org/10.5772/61793.

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Conference papers on the topic "Mobile hydraulic machine"

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Karhu, Otso I., Jani M. Vilenius, Jarno R. A. Uusisalo, Javier Moya Cid, and Kalevi J. Huhtala. "Intelligent Excavator for Hydraulic Mobile Machine." In 22nd International Symposium on Automation and Robotics in Construction. International Association for Automation and Robotics in Construction (IAARC), 2005. http://dx.doi.org/10.22260/isarc2005/0033.

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Uusisalo, Jarno R. A., Jani M. Vilenius, Tomi R. Krogerus, Otso I. Karhu, and Kalevi J. Huhtala. "Automated Bucket Stabiliser for Hydraulic Mobile Machine." In 22nd International Symposium on Automation and Robotics in Construction. International Association for Automation and Robotics in Construction (IAARC), 2005. http://dx.doi.org/10.22260/isarc2005/0034.

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Vukovic, Milos, Sebastian Sgro, and Hubertus Murrenhoff. "STEAM: A Mobile Hydraulic System With Engine Integration." In ASME/BATH 2013 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/fpmc2013-4408.

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In recent years, research institutions worldwide have developed a number of new mobile hydraulic systems. Despite their improved energy efficiency, these systems have yet to gain market acceptance due to their related increase in component costs and decrease in robustness. At the Institute for Fluid Power Drives and Controls in Aachen, a new system for mobile machines, named STEAM (Steigerung der Energieeffizienz in der Arbeitshydraulik mobiler Arbeitsmaschinen), is being developed using inexpensive off-the-shelf components. The aim is to improve the total system efficiency by considering all the subsystems in the machine. This is done by integrating the internal combustion engine (ICE) into the hydraulic design process. By using a constant pressure system in combination with a low-cost fixed displacement pump the hydraulic system is designed to ensure the ICE experiences a constantly high load in a region of high efficiency, so-called point operation. To decrease the hydraulic losses incurred when supplying the linear actuators with flow, an additional intermediate pressure rail with independent metering edges is used. This enables various energy efficient discrete operating modes, including energy regeneration and recuperation.
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Uusisalo, Jarno R. A., Albert Raneda, Jani M. Vilenius, and Kalevi J. Huhtala. "Wireless Starting System and Emergency Stop for Teleoperated Hydraulic Mobile Machine." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-59514.

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A small general-purpose teleoperated hydraulic mobile machine is studied at the Institute of Hydraulics and Automation at the Tampere University of Technology. Thanks to teleoperation, the operator of the machine is able to be in safe place during the driving when necessary. However, the actions of the machine can be dangerous for the people or the objects in the environment if problems appear for instance in the control system. On that account, safety issues must be considered carefully. Special attention has to be paid to stop the machine and start the engine again once the machine has recovered from an error situation. The goal of this paper is to describe the design and implementation of different kind of solutions to start and stop the machine wirelessly. The emergency stop can be activated through the wireless connection by the operator or by the automatic diagnostic system of the hydraulic mobile machine. The control system monitors the state of several hydraulic components such as hydraulic valves and motors by means of sensors during the operations of machine. The machine is teleoperated by using WLAN (Wireless Local Area Network) connection. The developed wireless starting system and emergency stop is totally independent of the WLAN link. In the first prototype of the wireless starting system and emergency stop, the wireless connection is carried out by using commercial, cost effective RF (Radio Frequency) modules. The data transfer protocol which is used by the modules is designed for this application. Protocol implementation is carried out with microcontrollers. Another version of the wireless starting system and emergency stop is carried out by using radio modems. The modems have better properties than the cost effective RF modules used in the first prototype due to their higher RF output power. Programmatically carried out automatic emergency stop, which stops the machine, if the WLAN connection between the control station and the machine breaks, is discussed. In that case, the independent wireless emergency stop connection is not needed. Implementations of the system are introduced in this paper. Also, some testing results and user experiences are described. Properties of these different implementations are compared: cost of the system, range, reliability and complexity of the implementation. By means of the studied results the most suitable solution to start the engine and stop the actions of the machine is chosen.
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Huova, Mikko, Jyrki Tammisto, Matti Linjama, and Jussi Tervonen. "Fuel Efficiency Analysis of Selected Hydraulic Hybrids in a Wheel Loader Application." In BATH/ASME 2018 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/fpmc2018-8869.

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There is a potential for significant improvement on fuel efficiency of many mobile machines by using hybrid technology as the Diesel engines are often driven at very inefficient operating points in these applications. The load generated by the working hydraulics of a mobile machine is often rapidly changing and contains high peak powers compared to the mean power required. This paper studies three different hydraulic hybrids in a wheel loader application. The study is based on a measured sand-loading Y-cycle. In addition to the hybrid systems, a load sensing proportional valve based reference machine and a modified machine based on independent metering valves are analyzed. All five system alternatives are analyzed systematically to enable a comparison of their fuel efficiency. The study shows that the fuel consumption of the machine can be decreased up to 28 % in such load cycle by using a suitable hydraulic hybrid system.
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Luostarinen, Lauri O., Rafael Åman, and Heikki Handroos. "Haptic Joystick for Improving Controllability of Remote-Operated Hydraulic Mobile Machinery." In 9th FPNI Ph.D. Symposium on Fluid Power. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/fpni2016-1507.

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Abstract:
Remote operation of hydraulic non-road mobile machinery (NRMM) is becoming more and more common. The remote operation has plenty of advantages in many applications. However, a significant drawback of remote operation is that the level of sensory feedback for operator is weaker compared to onboard operation. The lack of the sense of touch is decreasing the working efficiency and can lead to premature wear out of machine components. This can also lower the safety of the operation. In this work a haptic joystick controller for controlling NRMM is introduced. The haptic joystick is able to feedback constant forces and wide range of vibrations for operators. The haptic feedback force is calculated based on the sensor signals from the working machine. This paper introduces a setup for remote operation of a wheel loader. The control of the lift and tilt cylinders of the bucket is taking advantage of haptic feedback. The experimental study is carried out in a virtual environment. A multibody dynamic model of the wheel loader is run in real-time to study the effects of haptic feedback for the remote operation. Results of the remote operation with and without haptic feedback are compared. The comparison shows that the haptic feedback clearly affects on the force levels and the loads of the boom structure of the remote operated wheel loader. Taking advantage of haptic feedback in controllers of remote operated NRMM increases the operator’s understanding about the dynamic behavior of the machinery significantly. The results encourages to carry out further studies on improving the human-machine-interfaces (HMI) of remote operated hydraulic NRMM using haptic feedback.
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Uusisalo, Jarno, Kalevi Huhtala, and Matti Vilenius. "Effects of Remote Control on Usability of Hydraulic Excavator." In ASME 2009 Dynamic Systems and Control Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/dscc2009-2539.

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Remote control is often considered as a means of utilization when operating hydraulic mobile machines in hazardous environments. However, in some cases remote control may also improve the general usability of the machine, which is a good reason for using remote control also in normal (safe) work tasks. In this paper the effects of remote control on the usability of a hydraulic excavator were studied by means of two experiments. A group of subjects carried out two tasks which were related to digging soil with obstacles and controlling the excavator accurately. A remotely controlled hydraulic mobile machine with an excavator and a hand-held remote control with vibro-tactile haptic feedback were utilized as a test platform. The arrangements for the experiments are introduced and the results presented in this paper. The results show that short-range remote control may improve the usability of the hydraulic excavator significantly in some work tasks.
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8

Ghabcheloo, Reza, and Mika Hyvonen. "Modeling and motion control of an articulated-frame-steering hydraulic mobile machine." In 2009 17th Mediterranean Conference on Control and Automation (MED). IEEE, 2009. http://dx.doi.org/10.1109/med.2009.5164520.

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9

Hayn, Henning, and Dieter Schwarzmann. "Control Concept for a Hydraulic Mobile Machine Using a Haptic Operating Device." In 2009 Second International Conferences on Advances in Computer-Human Interactions (ACHI). IEEE, 2009. http://dx.doi.org/10.1109/achi.2009.43.

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Elton, Mark, Ryder Winck, and Wayne Book. "Command Feedback for Position Control of Hydraulic Machines." In ASME/BATH 2013 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/fpmc2013-4460.

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Previous research has shown that operator performance of industrial machines is superior with position control rather than rate control, except for large-workspace and dynamically slow manipulators, which includes most hydraulic machinery. This paper describes an investigation to determine why position control leads to better performance than rate control except for with dynamically slow manipulators, in an effort to increase operator performance of mobile hydraulic equipment. It examines why dynamically slow systems are an exception to the general rule, and proposes a human-machine interface (HMI), called command feedback, that leads to position control having superior performance, even in these exceptional situations. Thirty participants performed five tasks six times using one of five HMIs. A rate and a position controller were used to manipulate a dynamically fast system and a dynamically slow system that was designed to mimic the motion of hydraulic cylinders. A new HMI that provided real-time position feedback to the operator of his/her commanded position was applied to the position controller for the dynamically slow system. Task performance was measured and comparisons were made between position and rate control. The addition of the real-time position feedback to the dynamically slow system resulted in nearly identical performance with both controllers. From these results we conclude that position control is more intuitive for fast systems when human operators do not have the physical capability to control the velocity well with rate control, and that the intuitiveness of rate control for dynamically slow systems results from the lack of position feedback because of the machine’s speed of response. Command feedback can be used to elevate operator performance of hydraulic machinery.
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