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A New High Performance Roto-Translating Valve for Fault Tolerant Applications
Technical Paper
2014-01-2403
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The new X-by-Wire systems under study for commercial and heavy-duty vehicles, as well as for Agricultural Tractors, are increasingly real autonomous systems, capable to autonomously control a vehicle functionality, actuating the operator's commands, or managing in a complete autonomy a machine function. These application need an higher Performance Level from the functional safety point of view, due to the risk of a malfunction consequence. The paper deals with a new concept hydraulic spool valve that allow the design of new safer and more compacted hydraulic circuit architectures, ensuring higher safety performance levels. The architecture presents advantages both from performance (precision, fastness), both from operational point of view. The paper will focus in particular on safety and control topics. The new patented valve presents a secondary rotary type actuator connected to a sleeve interposed between the spool and the valve body, thus composing a roto-translating valve. The sleeve presents holes that can be moved and positioned partially or totally overlapped to the valve ports, thus allowing a secondary independent metering. The valve port area is then related to the movement of the spool, and to the rotary movement of the cylinder. The valve port area is the result of two actuators position, both controlled by a microcontroller based unit. Due to the valve structure, the metering control precision and valve speed are virtually quadratic in respect to the traditional valve spool position electronic control, due to the concurrency of two electronically controlled actuators. The valve can be configured to realize various control functions and, in terms of safety, it offers a fail operational characteristic, in reason of an operational redundancy and functional diversity.
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Citation
Ruggeri, M. and Marani, P., "A New High Performance Roto-Translating Valve for Fault Tolerant Applications," SAE Technical Paper 2014-01-2403, 2014, https://doi.org/10.4271/2014-01-2403.Also In
References
- Ansaloni G. , Marani P. , Paoluzzi R. Proportional Valve With Axial Flow And Rotational Metering Proc.s Of The 7th Japan International Fluid Power Symposium Toyama, Japan 3 September 2008
- Tu H. C. , Rannow M. B. , Wang M. , Li P. Y. , Chase T. R. Modeling And Validation Of A High Speed Rotary PWM On/Off Valve Proceedings of the ASME 2009 Dynamic Systems and Control Conference DSCC2009 October 12 14 2009 Hollywood, California, USA
- Reichert , M. and Murrenhoff H. New concepts and design of high response hydraulic valves using Piezo-technology. Power transmission and motion control Bath University of Bath 2006 401 414
- Nascutiu L. Voice Coil Actuator for Hydraulic Servo Valves with High Transient Performances IEEE International Conference on Automation, Quality and Testing, Robotics 2006 1 185 190
- Manhartsgruber B. A hydraulic control valve for PWM actuation at 400 Hz, Power transmission and motion control Bath University of Bath 2006 373 385
- Siivonen , L. , Linjama , M. & Vilenius , M. 2005 Analysis of fault tolerance of digital hydraulic valve system Johnston , D. N. , Burrows , C. R. & Edge , K. A. Power Transmission and Motion Control, PTMC2005 133 146 John Wiley & Sons, Ltd. 2005
- Marani P. , Ruggeri M. Elettrovalvola ad attuazione Lineare e Rotativa Italian Patent MI2012001370
- ISO 15998:2008 Earth-moving machinery - Machinecontrol systems (MCS) using electronic components - Performance criteria and tests for functional safety
- ISO 25119:2010 Tractors and machinery for agriculture and forestry - Safety-related parts of control systems
- ISO 13849:2009 Safety of machinery - Safety-related parts of control systems
- Directive 2006/42/EC Of The European Parliament And Of The Council of 17 May 2006 on machinery
- Deutsches Patent 102 41 977.9-14 Hochdynamische Servo-Ventilsteuervorrichtung
- Marani P. , Ruggeri M. A Novel Fault Tolerant High Precision Roto-Translating Spool Valve IFK 2014, 24-26/03/2014 Aachen, Germany
- ISO 4254:2013 Agricultural Machines - Safety ISO Geneva Switzerland 2013