The dynamic study of humans carrying prostheses requires the rigid-body inertia properties of the prostheses. Since such properties are difficult to evaluate, in general, roughly estimated values of these quantities are used. These approximations may yield significant errors in the evaluation of some dynamic quantities (i.e., the inertia forces due to the prosthesis). This work is addressed to assess an experimental technique, based on frequency response function measurements, that indirectly measures the inertia properties of prostheses for transfemoral amputees. First, a specifically designed specimen and, then, a real prosthesis are tested for assessing the proposed technique. The results are that the measurement sensitivity is $0.002 kg m2$ for inertia-tensor entries and 3 mm for center-of-gravity coordinates. Thus, the proposed technique is effective for a precise and fast evaluation of the inertia properties of medical devices such as prostheses.

1.
Aggarwal
,
J. K.
, and
Cai
,
Q.
, 1999, “
Human Motion Analysis: A Review
,”
Comput. Vis. Image Underst.
1077-3142,
73
(
3
), pp.
428
440
.
2.
Wang
,
L.
,
Hu
,
W.
, and
Tan
,
T.
, 2003, “
Recent Developments in Human Motion Analysis
,”
Pattern Recogn.
0031-3203,
36
, pp.
585
601
.
3.
Baca
,
A.
, 1996, “
Precise Determination of Anthropometric Dimensions by Means of Image Processing Methods for Estimating Human Body Segment Parameter Values
,”
J. Biomech.
0021-9290,
29
(
4
), pp.
563
567
.
4.
Nikolova
,
G.
, and
Toshev
,
Y.
, 2007, “
Estimation of Male and Female Body Segment Parameters of the Bulgarian Population Using a 16-Segmental Mathematical Model
,”
J. Biomech.
0021-9290,
40
, pp.
3700
3707
.
5.
Mak
,
A. F. T.
,
Zhang
,
M.
, and
Boone
,
D. A.
, 2001, “
State-of-the-Art Research in Lower-Limb Prosthetic Biomechanics Socket Interface: A Review
,”
J. Rehabil. Res. Dev.
0748-7711,
38
(
2
), pp.
161
174
.
6.
Pandy
,
M. G.
, 2001, “
Computer Modeling and Simulation of Human Movement
,”
Annu. Rev. Biomed. Eng.
1523-9829,
3
, pp.
245
273
.
7.
Popovic
,
D.
,
Oguztoreli
,
M. N.
, and
Stein
,
R. B.
, 1995, “
Optimal Control for an Above-Knee Prosthesis With Two Degrees of Freedom
,”
J. Biomech.
0021-9290,
28
(
1
), pp.
89
98
.
8.
Schedlinski
,
C.
, and
,
M.
, 2001, “
A Survey of Current Inertia Parameter Identification Methods
,”
Mech. Syst. Signal Process.
0888-3270,
15
(
1
), pp.
189
211
.
9.
Genta
,
G.
, and
Delprete
,
C.
, 1994, “
Some Considerations on the Experimental Determination of Moments of Inertia
,”
Meccanica
0025-6455,
29
, pp.
125
141
.
10.
Mucchi
,
E.
,
Fiorati
,
S.
,
Di Gregorio
,
R.
, and
Dalpiaz
,
G.
, 2009, “
Determining the Rigid-Body Inertia Properties of Cumbersome Systems: Comparison of Techniques in Time and Frequency Domain
,”
Proceedings of the IMAC XXVII
, Orlando, FL, Feb. 9–12.
11.
Pandit
,
S.
,
Hu
,
Z. Q.
, and
Yao
,
Y. X.
, 1992, “
Experimental Technique for Accurate Determination of Rigid Body Characteristics
,”
Proceedings of the IMAC X
, Los Angeles, CA, Feb., pp.
307
311
.
12.
Toivola
,
J.
, and
Nuutila
,
O.
, 1993, “
Comparison of Three Methods for Determining Rigid Body Inertia Properties From Frequency Response Function
,”
Proceedings of the IMAC XI
, pp.
1126
1132
.
13.
Okuma
,
M.
,
Heylen
,
W.
, and
Sas
P.
, 2000, “
Identification of the Rigid Body Properties of 3-D Frame Structure by MCK Identification Method
,”
Proceedings of the ISMA25
, Leuven, Belgium, Sept. 13–15.
14.
LMS International
, 2007, “
Advanced FRF Based Determination of Structural Inertia Properties
,” LMS Technical Report No. CR-07-3.
15.
Bretl
,
J.
, and
Conti
,
O.
, 1987, “
Rigid Body Mass Properties From Test Data
,”
Proceedings of the IMAC V
, London, UK, pp.
655
659
.
16.
Heylen
,
W.
,
Lammens
,
S.
, and
Sas
,
P.
, 2003,
Modal Analysis Theory and Testing
,
Katholieke Universitait Leuven
,
Leuven, Belgium
.
17.
Leurs
,
W.
,
Gielen
,
L.
,
Brughmans
,
M.
, and
Dierckx
,
B.
, 1997, “
Calculation of Rigid Body Properties From FRF Data: Practical Implementation and Test Case
,”
Proceedings of the IMAC XV
, Tokyo, Japan, pp.
1
7
.