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

Table 6

Result of the Type B 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	0.93	0.37	0.59	0.40	0.73	0.49	0.21	−0.12	22.11	−31.58
2	1.24	0.52	0.81	0.49	1.00	0.60	0.24	−0.08	19.05	−15.09
3	1.73	0.82	1.14	0.67	1.40	0.81	0.32	0.01	18.75	1.19
4	2.11	1.07	1.32	0.80	1.68	0.99	0.43	0.08	20.47	7.34
5	2.90	1.71	1.82	1.21	2.24	1.48	0.66	0.23	22.64	13.22
6	3.95	2.56	2.31	1.77	2.82	2.18	1.13	0.38	28.54	14.93
7	4.98	3.37	2.80	2.16	3.42	2.64	1.56	0.74	31.30	21.80
8	1.23	0.94	0.81	0.75	1.01	0.91	0.22	0.03	17.60	3.13
9	1.71	1.70	1.11	1.21	1.36	1.48	0.34	0.22	20.12	12.72
10	1.95	2.54	1.29	1.69	1.57	2.07	0.38	0.47	19.60	18.53
11	2.80	3.32	1.76	2.15	2.17	2.63	0.64	0.70	22.73	20.94
12	4.16	5.14	2.55	2.77	3.11	3.38	1.05	1.75	25.24	34.16
13	5.44	6.95	3.16	3.80	3.84	4.64	1.60	2.31	29.37	33.27
14	6.57	8.44	3.42	4.03	4.18	4.91	2.39	3.53	36.42	41.81
15	1.30	0.30	0.83	0.35	1.03	0.43	0.27	−0.13	21.05	−41.94
16	1.95	0.69	1.32	0.59	1.68	0.72	0.32	−0.03	16.58	−4.29
17	2.92	1.06	1.85	0.83	2.26	1.02	0.66	0.04	22.48	3.70
18	3.81	1.50	2.30	1.15	2.81	1.40	1.00	0.10	26.22	6.54
19	5.76	2.30	3.25	1.62	3.98	1.98	1.78	0.32	30.95	14.04
20	7.69	3.22	4.00	2.17	4.87	2.65	2.82	0.58	36.67	17.93
21	9.49	4.11	4.41	2.66	5.37	3.24	4.12	0.86	43.39	21.02
Average							1.05	0.57	25.30	9.21
Standard deviation							1.00	0.90	6.99	19.70