On improving the accuracy of instrumented spatial linkage system

Liu, Wen; Panjabi, Manohar M.

doi:10.1016/0021-9290(96)00019-x

Cited by 9 publications

References 7 publications

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“…This limits the practical use of the actual instrument to clinical studies, as also mentioned by Liu and Panjabi (1996). Although that was not an issue for this study, the instrument is successfully used for educational purposes on mock systems and provides students with a better understanding of knee joint kinematics (see Fig.…”

Section: Discussionmentioning

confidence: 94%

“…As a concluding remark, the author would like to emphasize that the actual absolute performance of the instrument was not an issue of this study and higher accuracies are acknowledged to be achieved by standard or custom-made ISLs used for clinical studies (Liu and Panjabi, 1996;Van Sint Jan et al, 2002;Sholukha et al, 2004), but these rely on the use of either smaller structures or more accurate transducers. In all of those cases, the proposed calibration technique could be still effective and either kinematic and electrical parameters uncertainties be considered.…”

Section: Article In Pressmentioning

confidence: 96%

“…potentiometers angles) must be negligible. As noticed by Liu and Panjabi (1996) accurate angular transducers, such as optical encoders may be used, but despite their higher performance these transducers are 'big, heavy and expensive', and the mechanical design of the ISL must rely on a stiffer and thus heavier and cumbersome structure accordingly.…”

Section: Introductionmentioning

confidence: 99%

“…Later, Suntay et al (1983) revised this general procedure and Kirstukas et al (1992a, b) applied it to improve the accuracy of a 6R-ISL. Liu and Panjabi (1996) applied a non-linear numerical calibration procedure to a planar 3-DOF ISL, removing the assumption of linear performance of potentiometers, which has been used that far. Recently, Sholukha et al (2004) proposed a method for the calibration of a 6R-ISL based on the use of a seven-order polynomial correction curve for potentiometers performance.…”

Section: Introductionmentioning

confidence: 99%

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Validation of a calibration technique for 6-DOF instrumented spatial linkages

Gatti

Danieli

2007

Journal of Biomechanics

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Section: Discussionmentioning

confidence: 94%

Section: Article In Pressmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Validation of a calibration technique for 6-DOF instrumented spatial linkages

Gatti

Danieli

2007

Journal of Biomechanics

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“…In 1992, Kirstukas et al [17] proposed a method to improve the design of a 6R-ISL in a desired range of motion using computer graphics and numerical methods. Liu and Panjabi [18] used a linear and non-linear numerical calibration procedure for each of the potentiometers of their ISL and obtained higher accuracy with low-cost potentiometers (0.5% of independent linearity). Salvia et al [12] designed a small 6R-ISL to study in vivo wrist circumduction and the resulting pivot point They also used linear regression to calibrate the potentiometers.…”

Section: Introductionmentioning

confidence: 99%