Speed acquisition methods for high-bandwidth servo drives

Bähr, Alexander

doi:10.1109/ias.2005.1518389

Cited by 11 publications

(3 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The three phase errors are also large (between 5º and 10º), so additional phase corrections will be imple-mented. Taking into account the large pitch (2 mm), a relatively low number of periods of the sensor will result, so directly corrections for each period, as in [4], will be considered.…”

Section: B Signal Processing and Evaluation Resultsmentioning

confidence: 99%

Evaluation of two position acquisition systems for permanent magnet linear motors with passive movers

Mihalachi

Mutschler

2008

2008 11th International Conference on Optimization of Electrical and Electronic Equipment

Self Cite

View full text Add to dashboard Cite

Long stator permanent magnet synchronous linear drives with passive, lightweight movers (vehicles) are proposed for material handling systems which require high dynamics. For high quality speed and position control of the vehicles, precise and fast position measurement is necessary. These passive vehicles present a restriction for the position acquisition system through the fact that neither energy nor information must be transmitted to the moving parts. The evaluation of two position acquisition systems which comply to this requirement will be presented in this paper: the first system is based on high resolution optical encoder and the second one uses a comparatively lower resolution capacitive sensor.

show abstract

Section: B Signal Processing and Evaluation Resultsmentioning

confidence: 99%

Evaluation of two position acquisition systems for permanent magnet linear motors with passive movers

Mihalachi

Mutschler

2008

2008 11th International Conference on Optimization of Electrical and Electronic Equipment

Self Cite

View full text Add to dashboard Cite

show abstract

“…The design parameter α was introduced in the symmetric optimal method [ 23 ]. The concept of symmetrical optimum selects the crossover frequency at the geometric mean of the two corner frequencies.…”

Section: Methodsmentioning

confidence: 99%

Enhancement of PVDF Sensing Characteristics by Retooling the Near-Field Direct-Write Electrospinning System

Hoe

Chang

Chen

et al. 2020

Sensors

View full text Add to dashboard Cite

This research aimed to develop a direct-write near-field electrospinning system (DW-NFES) with three-axis positioning of controllable speed, torque and position to produce sizable and high-quality piezoelectric fibers for sensing purposes. Sensor devices with high electrical response signals were developed and tested. To achieve DW-NFES purpose, a servo motor controller was designed to develop a high response rate, accurate positioning, and stable mobile device through the calculation of bandwidth and system time delay. With this retooled system of DW-NFES, controllable and uniform size fibers in terms of diameters, stretching force, and interspaces can be obtained. Sensor devices can be made selectively without a complicated lithography process. The characteristics of this DW-NFES platform were featured by high response rate, accurate positioning, and stable movement to make fibers with high piezoelectric property. In this study, polyvinylidene fluoride (PVDF) was used to explore and enhance their sensing quality through the platform. The parametric study of the process factors on piezoelectric sensing signals mainly included the concentration of electrospinning PVDF solution, high voltage electric field, and collection speed. Finally, the surface morphology and piezoelectric properties of the as-electrospun PVDF fibers were examined by scanning electron microscopy (SEM) and characterized by electrical response measurement techniques. The results showed that the fiber spinning speed of the DW-NFES system could be increased to ~125 from ~20 mm/s and the accuracy precision was improved to ~1 from ~50 μm, compared to conventional step motor system. The fiber diameter reached ~10 μm, and the electrospinning pitch reached to as small as ~10 μm. The piezoelectric output voltage of the electrospun fibers was increased ~28.6% from ~97.2 to ~125 mV; the current was increased ~27.6% from ~163 to ~208 nA, suggesting that the piezoelectric signals can be enhanced significantly by using this retooled system. Finally, an external control module (Arduino-MAGE) was introduced to control the PVDF piezoelectric fiber sensors integrated as a sensing array. The behavior of long-term sedentary patients can be successfully detected by this module system to prevent the patients from the bedsores.

show abstract

“…The manufacture of grating disc is restricted by the etching technology. How to improve the detection speed and detection accuracy from the finite position pulses has always been one of the research hot spots for servo drive system [2][3][4][5] . Methods of velocity detection can be divided into 2 classes, one is fixed sampling period M method, and the other is fixed sampling position T method.…”

Section: Introductionmentioning

confidence: 99%

High Quality Velocity Detection of Incremental Encoder for Servo Drive

Huang

2014

AMR

View full text Add to dashboard Cite

Considering the contradiction of detection speed and detection accuracy of incremental encoder, a novel digital velocity detection N/S algorithm is proposed in this paper. The algorithm of velocity detection mainly consists of two parts: the pulse sliding counting and velocity synchronous updating. In order to reduce the pulse-detection time delay, the pulse-sliding-counting method is used to count the encoder pulses during the sampling period, and the pulse-pattern sequences are obtained sequentially. In order to improve the accuracy of velocity detection, synchronization of velocity updating and pulse-mode alternation is applied, which reduces the calculation error caused by asynchronization of velocity updating. The experimental results are shown to demonstrate that the measurement speed and measurement accuracy are improved simultaneously by using of the proposed algorithm.

show abstract

Speed acquisition methods for high-bandwidth servo drives

Cited by 11 publications

References 29 publications

Evaluation of two position acquisition systems for permanent magnet linear motors with passive movers

Evaluation of two position acquisition systems for permanent magnet linear motors with passive movers

Enhancement of PVDF Sensing Characteristics by Retooling the Near-Field Direct-Write Electrospinning System

High Quality Velocity Detection of Incremental Encoder for Servo Drive

Contact Info

Product

Resources

About