Laser communication flat back servo pendulum mirror support structure optimization design

Xiaoming Li; Minghang Guo; Yingze Liu; Jialong Yao; Libiao Wang; Yunchong Dong; Xilai Chen

doi:10.3788/IRLA20230336

Journals >Infrared and Laser Engineering >Volume 52 >Issue 12 >Page 20230336 > Article

Infrared and Laser Engineering
Vol. 52, Issue 12, 20230336 (2023)

Laser communication flat back servo pendulum mirror support structure optimization design

Xiaoming Li^1,2, Minghang Guo^1,2, Yingze Liu^1,2, Jialong Yao²..., Libiao Wang², Yunchong Dong^1,2 and Xilai Chen^1,2|Show fewer author(s)

Author Affiliations

¹College of mechanical and Electronic Engineering, Changchun University of Science and Technology, Changchun 130022, China

²National and Local Joint Engineering Research Center of Space and Optoelectronics Technology, Changchun University of Science and Technology, Changchun 130022, China

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DOI: 10.3788/IRLA20230336 Cite this Article

Xiaoming Li, Minghang Guo, Yingze Liu, Jialong Yao, Libiao Wang, Yunchong Dong, Xilai Chen. Laser communication flat back servo pendulum mirror support structure optimization design[J]. Infrared and Laser Engineering, 2023, 52(12): 20230336 Copy Citation Text

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Fig. 1. General layout of single pendulum mirror servo turntable

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Fig. 2. Plane shape of pendulum mirror

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Fig. 3. Pendulum mirror-shaped cloud map of standard Earth gravity

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Fig. 4. Schematic diagram of flexible hinge structure. (a) Schematic diagram of hinge 1; (b) Schematic diagram of hinge 2

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Fig. 5. Schematic diagram of the main parameters of the flexible hinge structure

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Fig. 6. First-order modal cloud of the pendulum mirror assembly

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Fig. 7. Pendulum mirror 5 ℃ temperature rise (fall) and standard earth gravity effect of the mirror surface surface shape cloud map

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Fig. 8. Physical drawing of the pendulum mirror assembly and the whole machine assembly diagram

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Fig. 9. System for pendulum mirror assembly inspection

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Fig. 10. Results of pendulum mirror assembly surface shape testing at different temperatures

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Fig. 11. Sweep sine response curve under Z vibration

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Part	Material	E/GPa	ρ/g·cm⁻³	α/℃	k/W∙(M∙K)⁻³	ν
Mirror	Zerodur	91	2.53	0.05	1.64	0.24
Support	TC4	109	4.44	8.9	7.8	0.31

Table 1. Material properties of reflector components

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Level	Factors
Level	α/(°)	L1/mm	L2/mm
1	106	20	14
2	107	21	15
3	108	22	16
4	109	23	17

Table 2. Parameter level table of the position of the bonding point of the pendulum mirror

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No.	α/(°)	L1/mm	L2/mm	V/nm
1	106	20	14	0.861
2	106	21	15	0.804
3	106	22	16	0.877
4	106	23	17	1.067
5	107	20	15	0.851
6	107	21	14	0.660
7	107	22	17	1.070
8	107	23	16	0.863
9	108	20	16	0.895
10	108	21	17	0.905
11	108	22	14	1.059
12	108	23	15	1.053
13	109	20	17	1.117
14	109	21	16	1.033
15	109	22	14	1.198
16	109	23	15	1.289

Table 3. Orthogonal test scheme of the position of the bonding point of the pendulum mirror

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Factors	A	B	C
Factors	α/(°)	L1/mm	L2/mm
N1	0.902	0.931	0.945
N2	0.861	0.851	0.999
N3	0.978	1.051	0.917
N4	1.159	1.068	1.039
R	0.298	0.217	0.122

Table 4. Range analysis of factors of the position of the bonding point of the pendulum mirror

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Level	Factors
Level	a/mm	h/mm	b/mm	r/mm	s/mm	t/mm
1	12	2.4	16.5	2	2.4	8
2	13	2.8	17	2.5	2.8	9
3	14	3.2	17.5	3	3.2	10
4	15	3.6	18	3.5	3.6	11
5	16	4	18.5	4	4	12

Table 5. Parameter level of flexible support structure

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No.	a/mm	h/mm	b/mm	r/mm	s/mm	t/mm	P/nm
1	12	2.4	16.5	2	2.4	8	24.03
2	12	2.8	17	2.5	2.8	9	33.04
3	12	3.2	17.5	3	3.2	10	44.58
4	12	3.6	18	3.5	3.6	11	59.03
5	12	4	18.5	4	4	12	70.99
6	13	2.4	17	3	3.6	12	41.27
7	13	2.8	17.5	3.5	4	8	38.35
8	13	3.2	18	4	2.4	9	22.70
9	13	3.6	18.5	2	2.8	10	33.63
10	13	4	16.5	2.5	3.2	11	47.07
11	14	2.4	17.5	4	2.8	11	20.58
12	14	2.8	18	2	3.2	12	30.08
13	14	3.2	18.5	2.5	3.6	8	25.17
14	14	3.6	16.5	3	4	9	44.48
15	14	4	17	3.5	2.4	10	24.02
16	15	2.4	18	2.5	4	10	29.49
17	15	2.8	18.5	3	2.4	11	16.25
18	15	3.2	16.5	3.5	2.8	12	22.05
19	15	3.6	17	4	3.2	8	16.60
20	15	4	17.5	2	3.6	9	30.25
21	16	2.4	18.5	4	3.2	9	12.01
22	16	2.8	16.5	2	3.6	10	20.19
23	16	3.2	17	2.5	4	11	32.46
24	16	3.6	17.5	3	2.4	12	14.84
25	16	4	18	3.5	2.8	8	10.09

Table 6. Orthogonal test scheme of flexible support structure

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Factors	A	B	C	D	E	F
Factors	a/mm	h/mm	b/mm	r/mm	s/mm	t/mm
N1	46.33	25.48	31.64	27.70	20.37	22.85
N2	36.60	27.58	29.48	33.45	23.88	28.57
N3	28.87	29.27	29.72	32.28	30.07	30.38
N4	22.93	33.72	30.28	30.71	35.18	35.08
N5	17.92	36.48	31.61	28.58	43.15	35.85
R	28.41	11	2.16	5.75	22.78	13

Table 7. Range analysis of factors of flexible support structure

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Order	Fz/Hz	Mode of vibration
1	446.66	Pendulum mirror translates along the x-axis
2	1137.7	Pendulum mirror translates along the y-axis
3	1248.2	Pendulum mirror translates along the z-axis
4	1282.7	Pendulum mirror rotates around x-axis
5	1361.1	Pendulum mirror rotates around z-axis
6	2134.1	Pendulum mirror rotates around y-axis

Table 8. Results of modal analysis of pendulum mirror assembly

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Load case direction	Temperature rise		Temperature reduction
Load case direction	PV	RMS	PV	RMS
X	λ/16.34	λ/92.13	λ/16.75	λ/95.13
Y	λ/17.23	λ/94.97	λ/17.47	λ/95.43
Z	λ/16.55	λ/83.28	λ/19.88	λ/101