Pub Date : 2018-07-01DOI: 10.1109/GFPS.2018.8472391
Tobias Mielke, Jan Göpfert, H. Murrenhoff
Ferromagnetic shape memory alloys (FSMAs) are a group of materials, whose shape can be controlled by an external magnetic field. Their application as power units in hydraulic pumps may enhance the efficiency and lead to further advantages such as a lower wear, the ability of providing high dosing accuracies and ultimately the option of external actuation along with the associated simplicity of sealing and miniaturization. However, the use of FSMAs in hydraulic pumps is rarely covered in literature. The present article provides fundamental knowledge about the integration of FSMAs in hydraulic pumps and outlines outstanding issues. A simulation model provides information about the characteristics of a piston based hydraulic FSMA pump. The results of a parameter variation reveal the potential of FSMA-driven hydraulic pumps with special regard to $10mathrm{M$ Ni-Mn-Ga and point out several parameters affecting their performance. Obtaining pressure differences and volume flow rates of reasonable orders of magnitude, the results affirm the technical suitability of FSMAs as power units in hydraulic pumps.
{"title":"Potential of Ferromagnetic Shape Memory Alloys as Power Units in Hydraulic Pumps","authors":"Tobias Mielke, Jan Göpfert, H. Murrenhoff","doi":"10.1109/GFPS.2018.8472391","DOIUrl":"https://doi.org/10.1109/GFPS.2018.8472391","url":null,"abstract":"Ferromagnetic shape memory alloys (FSMAs) are a group of materials, whose shape can be controlled by an external magnetic field. Their application as power units in hydraulic pumps may enhance the efficiency and lead to further advantages such as a lower wear, the ability of providing high dosing accuracies and ultimately the option of external actuation along with the associated simplicity of sealing and miniaturization. However, the use of FSMAs in hydraulic pumps is rarely covered in literature. The present article provides fundamental knowledge about the integration of FSMAs in hydraulic pumps and outlines outstanding issues. A simulation model provides information about the characteristics of a piston based hydraulic FSMA pump. The results of a parameter variation reveal the potential of FSMA-driven hydraulic pumps with special regard to $10mathrm{M$ Ni-Mn-Ga and point out several parameters affecting their performance. Obtaining pressure differences and volume flow rates of reasonable orders of magnitude, the results affirm the technical suitability of FSMAs as power units in hydraulic pumps.","PeriodicalId":273799,"journal":{"name":"2018 Global Fluid Power Society PhD Symposium (GFPS)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133811196","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-07-01DOI: 10.1109/GFPS.2018.8472373
Reza Mohammadi Asl, and Heikki Handroos
In this paper, a new weighted adaptive unscented Kalman filter is introduced. The proposed filter is trying to improve the performance of the previous versions. To have better results, it uses the previous estimation parameters to update itself. The proposed Kalman filter is applied to estimate the states of the nonlinear systems under time varying noise with time varying statistics. A hydraulic system, as a nonlinear system, is used as an application for the simulation. The results of the simulation are given.
{"title":"New Weighted Adaptive Unscented Kalman Filter for Estimation of Hydraulic Systems","authors":"Reza Mohammadi Asl, and Heikki Handroos","doi":"10.1109/GFPS.2018.8472373","DOIUrl":"https://doi.org/10.1109/GFPS.2018.8472373","url":null,"abstract":"In this paper, a new weighted adaptive unscented Kalman filter is introduced. The proposed filter is trying to improve the performance of the previous versions. To have better results, it uses the previous estimation parameters to update itself. The proposed Kalman filter is applied to estimate the states of the nonlinear systems under time varying noise with time varying statistics. A hydraulic system, as a nonlinear system, is used as an application for the simulation. The results of the simulation are given.","PeriodicalId":273799,"journal":{"name":"2018 Global Fluid Power Society PhD Symposium (GFPS)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131359399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-07-01DOI: 10.1109/GFPS.2018.8472393
Aleksi Turunen, T. Minav, H. Hänninen, M. Pietola
The average mining loader is a diesel-hydraulic off- road mobile machine that is expected to routinely operate in enclosed areas. While traditional valve-controlled setups are common, there are other possible hydraulic systems that might grant benefits to such machines in addition to conventional hybridization. One avenue of improvement lies in electrification, which in itself is advantageous to underground mining machinery that would otherwise require extensive ventilation of their ICE exhaust. Electric power allows the application of direct pump control instead of conventional valve control, eliminating throttling losses. This is one possible method to achieve higher efficiencies when compared to conventional systems. This paper investigates the efficiency of a direct-driven hydraulic system for a mining loader, and compares it to a conventional load-sensing system that was previously installed in the same machine. The efficiency of the direct-driven system was determined to be superior in all tested cases, increasing from 21% to 53% at high velocity and from 2% to 22% at low velocity. In addition, the DDH system is capable of energy regeneration, recouping a portion of energy used for lifting thus allowing longer runtimes with a given battery capacity.
{"title":"Experimental Investigation Of Direct Drive Hydraulic Units Implemented In A Mining Loader","authors":"Aleksi Turunen, T. Minav, H. Hänninen, M. Pietola","doi":"10.1109/GFPS.2018.8472393","DOIUrl":"https://doi.org/10.1109/GFPS.2018.8472393","url":null,"abstract":"The average mining loader is a diesel-hydraulic off- road mobile machine that is expected to routinely operate in enclosed areas. While traditional valve-controlled setups are common, there are other possible hydraulic systems that might grant benefits to such machines in addition to conventional hybridization. One avenue of improvement lies in electrification, which in itself is advantageous to underground mining machinery that would otherwise require extensive ventilation of their ICE exhaust. Electric power allows the application of direct pump control instead of conventional valve control, eliminating throttling losses. This is one possible method to achieve higher efficiencies when compared to conventional systems. This paper investigates the efficiency of a direct-driven hydraulic system for a mining loader, and compares it to a conventional load-sensing system that was previously installed in the same machine. The efficiency of the direct-driven system was determined to be superior in all tested cases, increasing from 21% to 53% at high velocity and from 2% to 22% at low velocity. In addition, the DDH system is capable of energy regeneration, recouping a portion of energy used for lifting thus allowing longer runtimes with a given battery capacity.","PeriodicalId":273799,"journal":{"name":"2018 Global Fluid Power Society PhD Symposium (GFPS)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129200636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-07-01DOI: 10.1109/GFPS.2018.8472367
Ivan Baus, Robert Rahmfeld, Andreas Schumacher, H. Pedersen
The need for improvement of lifetime prediction of hydrostatic axial piston units is driven by partly outdated knowledge dating back to the 1970s and is also motivated by a significant evolution of hydrostatic drivetrains. However, the evolution of the load life is unknown and must be investigated. An additional aspect for the method improvement is the potential decrease of qualification effort caused by required evaluation background. The goal is an increase in the prediction accuracy of the lifetime by using of qualitative and quantitative calculation methods. This paper covers the analysis phase of the lifetime calculation improvement. Hence, the currently used calculation method is investigated and the improvement potential builds the research approach. The improvement potential covers calculation model of load-dependent treatment, where the characteristics of sub-components build a system assessment. The aim includes the representative load cycle acquisition for typical applications in the off-road market.
{"title":"Development of Methodology for Lifetime Calculation for Axial Piston Units.","authors":"Ivan Baus, Robert Rahmfeld, Andreas Schumacher, H. Pedersen","doi":"10.1109/GFPS.2018.8472367","DOIUrl":"https://doi.org/10.1109/GFPS.2018.8472367","url":null,"abstract":"The need for improvement of lifetime prediction of hydrostatic axial piston units is driven by partly outdated knowledge dating back to the 1970s and is also motivated by a significant evolution of hydrostatic drivetrains. However, the evolution of the load life is unknown and must be investigated. An additional aspect for the method improvement is the potential decrease of qualification effort caused by required evaluation background. The goal is an increase in the prediction accuracy of the lifetime by using of qualitative and quantitative calculation methods. This paper covers the analysis phase of the lifetime calculation improvement. Hence, the currently used calculation method is investigated and the improvement potential builds the research approach. The improvement potential covers calculation model of load-dependent treatment, where the characteristics of sub-components build a system assessment. The aim includes the representative load cycle acquisition for typical applications in the off-road market.","PeriodicalId":273799,"journal":{"name":"2018 Global Fluid Power Society PhD Symposium (GFPS)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123424882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-07-01DOI: 10.1109/GFPS.2018.8472390
Henrique Raduenz, J. V. De Negri
The combination of hydraulic drivetrains and wind turbines impose control challenges due to their inherent dynamic behaviour. At the same time, the increase in system performance due to controller improvements causes a considerable impact on the turbine’s performance. In such wind turbines, the system is controlled through pressure. Based on aerodynamic, hydraulic and mechanical parameters and measurements, the pressure is regulated for the rotor achieve maximum aerodynamic efficiency at steady state. However, the reference pressure might be inaccurate due to the difficulty in determining exact component’s parameters and wind measurement, leading to a suboptimal rotor speed. The wrong pressure reference is a consequence on most control methods that are based on the classic $Komega^{2$ law. In this paper, a control structure is presented where the turbine rotor speed error is used to compensate the pressure reference calculated by the $Komega^{2$ law. The proposed structure can lead to optimal operation despite the components parameter uncertainties. Nevertheless, it uses wind speed measurement, which also contain uncertainties. The proposed method with rotor speed compensation is compared to the classic $Komega^{2$ law. Their performance is assessed through system simulation with added uncertainties in system efficiency and in wind speed measurement. Experimental tests are shown to confirm the simulated system behavior and the actuation of the speed compensation. The presented control method allows for faster system response and better tracking of optimal rotor operation point under certain conditions. It is confirmed that the system can increase the energy extraction from the wind however, the system overall efficiency is not necessarily improved.
{"title":"Speed Compensation in Hydraulic Wind Turbine Control","authors":"Henrique Raduenz, J. V. De Negri","doi":"10.1109/GFPS.2018.8472390","DOIUrl":"https://doi.org/10.1109/GFPS.2018.8472390","url":null,"abstract":"The combination of hydraulic drivetrains and wind turbines impose control challenges due to their inherent dynamic behaviour. At the same time, the increase in system performance due to controller improvements causes a considerable impact on the turbine’s performance. In such wind turbines, the system is controlled through pressure. Based on aerodynamic, hydraulic and mechanical parameters and measurements, the pressure is regulated for the rotor achieve maximum aerodynamic efficiency at steady state. However, the reference pressure might be inaccurate due to the difficulty in determining exact component’s parameters and wind measurement, leading to a suboptimal rotor speed. The wrong pressure reference is a consequence on most control methods that are based on the classic $Komega^{2$ law. In this paper, a control structure is presented where the turbine rotor speed error is used to compensate the pressure reference calculated by the $Komega^{2$ law. The proposed structure can lead to optimal operation despite the components parameter uncertainties. Nevertheless, it uses wind speed measurement, which also contain uncertainties. The proposed method with rotor speed compensation is compared to the classic $Komega^{2$ law. Their performance is assessed through system simulation with added uncertainties in system efficiency and in wind speed measurement. Experimental tests are shown to confirm the simulated system behavior and the actuation of the speed compensation. The presented control method allows for faster system response and better tracking of optimal rotor operation point under certain conditions. It is confirmed that the system can increase the energy extraction from the wind however, the system overall efficiency is not necessarily improved.","PeriodicalId":273799,"journal":{"name":"2018 Global Fluid Power Society PhD Symposium (GFPS)","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114510293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-07-01DOI: 10.1109/GFPS.2018.8472392
A. Matbouei, M. Michael Bech, O. Torben Andersen
this paper investigates a solenoid actuator performance used for switching a valve used in Digital Displacement Machines (DDM), which is a developing fluid power technology that has rigorous valve requirements for obtaining a high efficiency including milli-second range switching time. The objective of the paper is to develop and validate a computational model, which is describing the actuator and the valve behavior. In order to estimate the switching time of the valve, a coupled simulation method is established. A transient electro-magnetic finite-element-analysis including moving mesh configuration is coupled to a dynamic motion interface, which includes a group of ordinary differential equations defining the movement of the valve plunger. In this model, the spring force, which lets the valve to open passively is coupled with the electromagnetic actuator force. Then, the results of the simulation are compared against measurements results obtained from a set of experiments based on a valve prototype. Comparisons of current and plunger position show that the model describes both the actuator and the valve motion very well.
{"title":"Modelling Of Solenoid Actuated Fast Switching Valve For Digital Hydraulic Machines","authors":"A. Matbouei, M. Michael Bech, O. Torben Andersen","doi":"10.1109/GFPS.2018.8472392","DOIUrl":"https://doi.org/10.1109/GFPS.2018.8472392","url":null,"abstract":"this paper investigates a solenoid actuator performance used for switching a valve used in Digital Displacement Machines (DDM), which is a developing fluid power technology that has rigorous valve requirements for obtaining a high efficiency including milli-second range switching time. The objective of the paper is to develop and validate a computational model, which is describing the actuator and the valve behavior. In order to estimate the switching time of the valve, a coupled simulation method is established. A transient electro-magnetic finite-element-analysis including moving mesh configuration is coupled to a dynamic motion interface, which includes a group of ordinary differential equations defining the movement of the valve plunger. In this model, the spring force, which lets the valve to open passively is coupled with the electromagnetic actuator force. Then, the results of the simulation are compared against measurements results obtained from a set of experiments based on a valve prototype. Comparisons of current and plunger position show that the model describes both the actuator and the valve motion very well.","PeriodicalId":273799,"journal":{"name":"2018 Global Fluid Power Society PhD Symposium (GFPS)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116292532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-07-01DOI: 10.1109/GFPS.2018.8472369
A. Gimadiev, N. Bystrov, A. Utkin, D. Stadnik
In power plant and test equipment control systems pressure sensors are often connected by pressure transmission lines for conditions of high temperatures and vibrations. In the presence of pressure pulsations in the monitored object, a restrictor is installed at the pressure transducer inlet. Restrictors serially produced for pressure transducers have a nonlinear flow-drop characteristic which leads to the additional measurement error of the medium or slowly changing component of the pulsating pressure. This distortion can significantly exceed the error of the transducer itself. The results of theoretical and experimental studies of the additional error depending on the parameters of the measurement circuit and pressure pulsations (amplitude, frequency, spectrum and phase shift between components) are presented. Recommendations on the choice of damper parameters for which the additional error can be neglected are given. The methodology developed by the authors can be used to create measurement circuit for an average or slowly changing component of the pulsating pressure measurement in power plant monitored measurement and control systems.
{"title":"On the additional error of a nonlinear hydraulic measuring circuit with pressure pulsations at the inlet","authors":"A. Gimadiev, N. Bystrov, A. Utkin, D. Stadnik","doi":"10.1109/GFPS.2018.8472369","DOIUrl":"https://doi.org/10.1109/GFPS.2018.8472369","url":null,"abstract":"In power plant and test equipment control systems pressure sensors are often connected by pressure transmission lines for conditions of high temperatures and vibrations. In the presence of pressure pulsations in the monitored object, a restrictor is installed at the pressure transducer inlet. Restrictors serially produced for pressure transducers have a nonlinear flow-drop characteristic which leads to the additional measurement error of the medium or slowly changing component of the pulsating pressure. This distortion can significantly exceed the error of the transducer itself. The results of theoretical and experimental studies of the additional error depending on the parameters of the measurement circuit and pressure pulsations (amplitude, frequency, spectrum and phase shift between components) are presented. Recommendations on the choice of damper parameters for which the additional error can be neglected are given. The methodology developed by the authors can be used to create measurement circuit for an average or slowly changing component of the pulsating pressure measurement in power plant monitored measurement and control systems.","PeriodicalId":273799,"journal":{"name":"2018 Global Fluid Power Society PhD Symposium (GFPS)","volume":"140 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131621450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-07-01DOI: 10.1109/GFPS.2018.8472317
D. L. Karelin, A. V. Boldyrev, A. Belousov, S. I. Kharchuk
The article considers the vehicle hydrostatic transmission containing a volumetric axial flow divider. The displacements of sections of the flow divider are varied by adjusting the swash plates angles. Thus, the flow divider provides independent control of the angular velocity of each unadjustable hydraulic motor. The method of calculating the swash plate slope angle of each section of the flow divider in dependence on the turning radius of the vehicle is presented. The static characteristics of the hydrostatic transmission of the vehicle under the conditions of motion along a curvilinear trajectory were obtained.
{"title":"Research of the Hydrostatic Transmission Static Characteristics in Case of Curvilinear Moving of the Mobile Machine","authors":"D. L. Karelin, A. V. Boldyrev, A. Belousov, S. I. Kharchuk","doi":"10.1109/GFPS.2018.8472317","DOIUrl":"https://doi.org/10.1109/GFPS.2018.8472317","url":null,"abstract":"The article considers the vehicle hydrostatic transmission containing a volumetric axial flow divider. The displacements of sections of the flow divider are varied by adjusting the swash plates angles. Thus, the flow divider provides independent control of the angular velocity of each unadjustable hydraulic motor. The method of calculating the swash plate slope angle of each section of the flow divider in dependence on the turning radius of the vehicle is presented. The static characteristics of the hydrostatic transmission of the vehicle under the conditions of motion along a curvilinear trajectory were obtained.","PeriodicalId":273799,"journal":{"name":"2018 Global Fluid Power Society PhD Symposium (GFPS)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129449623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-04-20DOI: 10.1109/GFPS.2018.8472364
Patrik Bordovský, Sara Hamed Adibpoor, H. Murrenhoff, O. Reinertz
Hydraulic disc brakes are used in trains and light rail vehicles due to their high power density, compact design, and good dynamic performance. In general, there are spring-applied actuators and so-called active brakes. The spring-applied actuators are commonly used as safety features in trams since their mechanical spring generates the necessary braking force without any other energy supply. In contrast, the braking force of the active brakes is proportional to the hydraulic pressure. However, the generated braking torque is seldom a part of a closed-loop control and no counteracting action is usually taken against the several disturbances acting in the contact zone between brake pads and disc, where a variable friction coefficient arises. Consequently, phenomena such as brake judder may occur, leading to passengers’ uneasiness and degradation of the braking performance. Within a research project conducted at the Institute for Fluid Power Drives and Systems at RWTH Aachen University, a closed-loop active disc brake for trams is under development. It has been found that the force exerted along the brake support pole is eligible for the estimation of the actual braking torque. Hence, this force is utilized as a feedback signal. By replacing the support pole with a hydro-mechanical supporting unit, a closed loop control of the braking torque can be realized. This paper focuses on the novel active disc brake and suggests the embedding of a hydro-mechanical supporting unit into the standardized brake design to ensure accuracy and repeatability of the generated braking torque.
{"title":"Simulation of an Active Disc Brake with a Hydro-Mechanical Torque Control","authors":"Patrik Bordovský, Sara Hamed Adibpoor, H. Murrenhoff, O. Reinertz","doi":"10.1109/GFPS.2018.8472364","DOIUrl":"https://doi.org/10.1109/GFPS.2018.8472364","url":null,"abstract":"Hydraulic disc brakes are used in trains and light rail vehicles due to their high power density, compact design, and good dynamic performance. In general, there are spring-applied actuators and so-called active brakes. The spring-applied actuators are commonly used as safety features in trams since their mechanical spring generates the necessary braking force without any other energy supply. In contrast, the braking force of the active brakes is proportional to the hydraulic pressure. However, the generated braking torque is seldom a part of a closed-loop control and no counteracting action is usually taken against the several disturbances acting in the contact zone between brake pads and disc, where a variable friction coefficient arises. Consequently, phenomena such as brake judder may occur, leading to passengers’ uneasiness and degradation of the braking performance. Within a research project conducted at the Institute for Fluid Power Drives and Systems at RWTH Aachen University, a closed-loop active disc brake for trams is under development. It has been found that the force exerted along the brake support pole is eligible for the estimation of the actual braking torque. Hence, this force is utilized as a feedback signal. By replacing the support pole with a hydro-mechanical supporting unit, a closed loop control of the braking torque can be realized. This paper focuses on the novel active disc brake and suggests the embedding of a hydro-mechanical supporting unit into the standardized brake design to ensure accuracy and repeatability of the generated braking torque.","PeriodicalId":273799,"journal":{"name":"2018 Global Fluid Power Society PhD Symposium (GFPS)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127986861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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