Sensorless position control with a hydraulic stepper drive — Concept, compression modeling and experimental investigation

Gradl, Christoph; Plöckinger, Andreas; Scheidl, Rudolf

doi:10.1016/j.mechatronics.2016.01.004

Cited by 20 publications

(16 citation statements)

References 6 publications

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“…After calculation, motor equivalent displacement is 138.2 mL/r. The total flow of driving system hydraulic circuit can be calculated by combining formulas (5) and (6). Its value is 13.26 L/min.…”

Section: Calculation Of Hydraulic Driving System Parametersmentioning

confidence: 99%

Design and simulation for driving system and steering system of hydraulic chassis of rice transplanter

Zhang

2018

Advances in Mechanical Engineering

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A new hydraulic chassis of rice transplanter is designed based on the paddy machinery operation requirements. Driving system adopts single pump four-motor scheme, and the anti-slide valve group is used to prevent the slippage of the shuntwound hydraulic motors. Hydraulic steering system adopts single-way stable diverter valve for ensuring its response in time. Then, hydraulic system and components parameters are designed and calculated. The driving resistance and average slip rate are measured in paddy field. The experimental data verifies the correctness of theoretical calculation. The designed hydraulic driving system and steering system are simulated in AMESim. The simulated data, including pressure, flow, and torque, basically conform to the design requirement. The results verify the feasibility and reliability of chassis hydraulic scheme. The proposed design scheme may be extended to other vehicles for improving chassis performance.

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Section: Calculation Of Hydraulic Driving System Parametersmentioning

confidence: 99%

Design and simulation for driving system and steering system of hydraulic chassis of rice transplanter

Zhang

2018

Advances in Mechanical Engineering

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“…Chalupa et al studied the modelling and optimal PID control in the MATLAB/Simulink environment [5]. Gradl et al presented a linear hydraulic stepper drive for sensorless positioning tasks [6]. Ding et al studied the trajectorytracking problem and proposed a novel nonlinear control algorithm [7].…”

Section: Introductionmentioning

confidence: 99%

Model and Simulation Analysis of a High Speed Hydraulic System in a Fineblanking Press

Yi¹,

Feng²

2018

dtetr

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Abstract. As a key component of a hydraulic fineblanking press, a high speed hydraulic system is used to achieve the rapid movement of the slider in the noncutting stage, which is important for improving the processing efficiency. It is important to study the various properties of a high speed hydraulic system as the rapid movement affects the precision of the machine as well as the quality of the stamping parts. In this paper, a high speed hydraulic system model was established, and the static and dynamic characteristics of the key components in the system were simulated and analyzed. The system control logic was designed according to the blanking process, and the changes in the speed, displacement, pressure and flow of the high speed cylinder in the blanking process were analyzed. A strategy using PID feedback control of the system was proposed to improve the blanking precision and provide a reliable basis for the control system design.

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“…The authors investigated a high accuracy linear hydraulic stepper drive for sensorless position tasks in hydraulics [9] based on the patent [10]. The practicability of the sensorless concept was evaluated for a 220 kN cylinder drive as depicted in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Performance of an Energy Efficient Low Power Stepper Converter

Gradl¹,

Scheidl²

2017

Energies

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This paper presents the development of an energy efficient low power stepper converter. A prototype with a hydraulic output power of ≈600 W was designed, manufactured, investigated and improved. The converter consists of a hydraulic cylinder piston unit controlled by a fast switching valve to displace a defined fluid quantum by the limited forward stroke of the piston in its cylinder. The displaced fluid generates a precise, incremental motion of a load cylinder which should be controlled. Energy saving is achieved by storing the pressure surplus intermediately in the kinetic energy of the piston to displace a part of the fluid quantum without hydraulic energy from the supply line. Energy recuperation can be done in a similar way. Simulations and experiments showed two main efficiency improvement measures of the first converter prototype. The weak points were the commercially available check valves and the used guidance system for the pistons. The second part of the paper reports about the development of a fast check valve and of a combined hydrostatic hydrodynamic bearing system based on the elastic deformation of plastics. The theoretical and experimental results show a significant improvement of the energy efficiency, the potential of this drive technology and further improvement potential. Expressed in terms of numbers an energy efficiency increase compared to a resistance control up to 30% and a maximum recuperation energy efficiency over 60% were measured.

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Sensorless position control with a hydraulic stepper drive — Concept, compression modeling and experimental investigation

Cited by 20 publications

References 6 publications

Design and simulation for driving system and steering system of hydraulic chassis of rice transplanter

Design and simulation for driving system and steering system of hydraulic chassis of rice transplanter

Model and Simulation Analysis of a High Speed Hydraulic System in a Fineblanking Press

Performance of an Energy Efficient Low Power Stepper Converter

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