Name
Title | ||
|---|---|---|
A new method for digital encoder adaptive velocity/acceleration evaluation using a TDC with picosecond accuracy |
Abstract | ||
|---|---|---|
In this paper, a new methodology for deriving the velocity and the acceleration information of a digital encoder through processing its pulse train, is presented. The proposed method is based on accurate time measurement (with picosecond accuracy) as well as encoder pulse counting in adaptively changing time intervals, providing thus a wide-range velocity evaluation with very good accuracy. The method offers better response times at low speeds and very high-accuracy at the full range of measured velocities. By using the proposed method, the velocity measurement accuracy is improved compared to currently known methods, since high-resolution time-to-digital converters (TDC) are included in the design. The increased accuracy in velocity measurement allows the application of the simple arithmetic differentiation method on the velocity information in order to derive the acceleration, which in other cases would not be suggested due to accumulated quantization noise. A digital signal processor (DSP) also allows the implementation of numerous other methods to calculate acceleration. The proposed configuration has been implemented in specific hardware (FPGA), reserving thus the computational power of the system controlling DSP for high-level control tasks. |
Year | DOI | Venue |
|---|---|---|
2009 | 10.1016/j.micpro.2009.09.001 | Microprocessors and Microsystems - Embedded Hardware Design |
Keywords | Field | DocType |
velocity measurement accuracy,velocity information,adaptive sampling interval,wide-range velocity evaluation,good accuracy,increased accuracy,time-to-digital converter (tdc),velocity measurement,digital encoder adaptive velocity,picosecond accuracy,acceleration evaluation,digital encoder,new method,velocity/acceleration evaluation,field programmable gate array (fpga),simple arithmetic differentiation method,measured velocity,digital signal processor,quantization noise,field programmable gate array,high resolution | Digital signal processing,Digital signal processor,Computer science,Field-programmable gate array,Pulse wave,Real-time computing,Acceleration,Encoder,Accuracy and precision,Quantization (signal processing) | Journal |
Volume | Issue | ISSN |
33 | 7-8 | Microprocessors and Microsystems |
Citations | PageRank | References |
3 | 0.43 | 5 |
Authors | ||
4 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| J. N. Lygouras | 1 | 53 | 5.33 |
| Vassilis S. Kodogiannis | 2 | 272 | 35.17 |
| T. P. Pachidis | 3 | 3 | 0.43 |
| G. Ch. Sirakoulis | 4 | 132 | 14.36 |