Performance Improvement of Membrane Stress Measurement Equipment through Evaluation of Added Mass of Membrane and Error Correction

Table 7

Result of the Type C membrane material under setup stress of and or ( target stress; target ratio).

Case			Estimation stress (kN m^−1)		Considering added mass of membrane
	( = target stress)
	Setup stress (kN m^−1)				Estimation stress (kN m^−1)		Error of stress (kN m^−1)		Error ratio (%)
	1	0.67	0.57	0.56	0.42	0.69	0.51	−0.02	0.06	−2.94	10.34
2	1.11	0.78	0.83	0.56	1.02	0.69	0.09	0.10	7.97	12.50
3	1.53	1.12	1.09	0.78	1.34	0.97	0.19	0.15	12.18	13.16
4	1.95	1.48	1.37	1.01	1.69	1.25	0.26	0.23	13.57	15.23
5	2.83	2.33	1.84	1.52	2.26	1.86	0.57	0.47	20.07	20.17
6	3.70	3.19	2.33	2.00	2.85	2.45	0.85	0.74	23.02	23.08
7	4.62	4.13	2.70	2.54	3.31	3.11	1.30	1.02	28.24	24.70
8	1.06	1.06	0.76	0.74	0.93	0.92	0.13	0.14	12.04	12.96
9	1.45	1.87	1.01	1.25	1.23	1.54	0.22	0.32	14.87	17.37
10	1.85	2.75	1.25	1.78	1.55	2.19	0.30	0.57	16.40	20.64
11	2.34	3.67	1.57	2.25	1.92	2.76	0.42	0.90	17.99	24.60
12	3.19	5.27	2.20	2.93	2.70	3.59	0.49	1.69	15.39	31.97
13	4.08	6.91	2.80	3.65	3.42	4.45	0.66	2.46	16.11	35.60
14	4.96	8.49	2.96	4.25	3.62	5.18	1.34	3.30	27.08	38.92
15	1.16	0.49	0.84	0.34	1.03	0.42	0.13	0.07	11.02	14.00
16	1.95	0.91	1.38	0.62	1.70	0.75	0.25	0.16	13.07	17.20
17	2.88	1.37	1.89	0.96	2.32	1.18	0.56	0.20	19.39	14.29
18	3.80	1.85	2.39	1.27	2.93	1.56	0.87	0.29	22.94	15.87
19	5.60	2.79	3.17	1.95	3.87	2.39	1.72	0.40	30.82	14.39
20	7.26	3.67	3.99	2.26	4.88	2.76	2.38	0.90	32.79	24.60
21	8.78	4.60	4.38	2.82	5.34	3.45	3.44	1.15	39.17	24.95
Average							0.73	0.77	20.31	18.63
Standard deviation							0.84	0.84	7.69	9.23