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Optimal Robust Control of AC Position Servo System for Multiple Rockets

Chai Huawei,Ma Dawei,Li Zhigang,Le Guigao,Wang Feng

Strategic Study of CAE 2007, Volume 9, Issue 10,   Pages 83-87

Abstract:

In order to realize high speed and high precision position control in an AC servo system,  in view of such kinds of uncertainties as moment of inertia and load moment changing widely,  and strong impact moment,  an optimal robust control tactics is put forward.  Experimental results show that this control tactics has strong robustness,  and has fairly good dynamic performances and steady-state precision.

Keywords： rocket mortar     AC position servo system     robust control     optimal control    

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Experimental investigation on concrete overlaid with textile reinforced mortar: Influences of mix, temperature

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 2,   Pages 271-283 doi: 10.1007/s11709-022-0896-z

Abstract: Textile reinforced mortar is widely used as an overlay for the repair, rehabilitation, and retrofittingIn this study, we developed a textile-reinforced mortar mix using river sand and evaluated the differentcharacteristics of the textile-reinforced mortar under various exposure conditions.Investigations were performed on three different thicknesses of the textile reinforced mortar overlaidThe experimental findings indicated the feasibility of using textile reinforced mortar as an overlay

Keywords： textile reinforced mortar     bending tests     acid and alkaline environment     concrete overlay    

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Mechanical properties and microstructure of multilayer graphene oxide cement mortar

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4,   Pages 1058-1070 doi: 10.1007/s11709-021-0747-3

Abstract: multilayer graphene oxide (MGO) on compressive strength, flexural strength, and microstructure of cement mortarThe cement mortar was prepared with type P. II. 52.5 Portland cement, standard sand, and MGO.The testing result shows that the compressive of GO-cement mortar increased by 4.84%–13.42%, and theGO-cement mortar’s compressive strength and flexural strength at 7 d increased by 3.84%–12.08% and 2.54%Furthermore, the regulating action of MGO for the microstructure of cement mortar at an early age was

Keywords： graphene oxide     cement     mortar     mechanical properties     microstructure    

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Exploration of the Development Road for Chinese Liquid Rocket Engine in 21st Century

Wang Heng

Strategic Study of CAE 1999, Volume 1, Issue 2,   Pages 1-5

Abstract:

Liquid rocket engine is an important member of the space propulsion family and the only propellingMeanwhile, we should begin preliminary researches on rocket spaceplane and aerospike nozzle adopted by

Keywords： propulsion having top priority     liquid rocket engine     heavy lift launch vehicle     rocket spaceplane    

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XB High Accuracy Rocket Sled Test Track

Yang Xingbang

Strategic Study of CAE 2000, Volume 2, Issue 10,   Pages 98-104

Abstract:

Rocket sled test track is a large ground dynamic simulating test facility.China has successfully built the world ´s only track —XB high accuracy rocket sled test track

Keywords： rocket sled     test track     ground dynamic simulating test    

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Experimental study and assessment of thermal energy storage mortar with paraffin/recycled brick powder

Luchen HAO; Jianzhuang XIAO; Wanzhi CAO; Jingting SUN

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 10,   Pages 1301-1314 doi: 10.1007/s11709-022-0883-4

Abstract: Thermal energy storage recycled powder mortar (TESRM) was developed in this study by incorporating paraffinThe fresh mortar properties and hardened properties were also investigated in this study.The addition of paraffin/BP composite PCM had a positive impact on the mechanical properties of mortarat later ages, and could also reduce the dry shrinkage of mortar.The thermal properties of TESRM were better than those of normal mortar.

Keywords： recycled powder mortar     recycled brick powder     thermal energy storage     paraffin     phase change material    

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Astronauts Hitch First Ride Aboard Private Rocket to Space Station

Chris Palmer

Engineering 2020, Volume 6, Issue 11,   Pages 1207-1209 doi: 10.1016/j.eng.2020.08.007

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Experimental study on behavior of mortar-aggregate interface after elevated temperatures

Wan WANG, Jianzhuang XIAO, Shiying XU, Chunhui WANG

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 2,   Pages 158-168 doi: 10.1007/s11709-016-0374-6

Abstract: A push-out test program was designed and conducted to study the meso-scale behavior of mortar-aggregateThe MCs and MRACs were designed with different strength grade of mortar and were exposed to differentBesides, effect of temperatures and strength grade of mortar on residual peak load and peak displacementFor MC and MRAC with higher strength of new hardened mortar, the residual peak load kept constant whenFor MRAC with lower strength of new hardened mortar, the residual peak load began to reduce when the

Keywords： mortar-aggregate interface     push-out test     elevated temperatures     modeled concrete (MC)     modeled recycled    

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microstructure, thickness, porosity and its relation with compressive and flexural strength of cement mortar

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 2,   Pages 191-201 doi: 10.1007/s11709-021-0792-y

Abstract: A new insight into the interfacial transition zone (ITZ) in cement mortar specimens (CMSs) that is influenced

Keywords： cement fineness     interfacial transition zone     compressive and flexural strength    

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Acid-treated carbon nanotubes and their effects on mortar strength

M. ELKASHEF,K. WANG,M. N. ABOU-ZEID

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 2,   Pages 180-188 doi: 10.1007/s11709-015-0325-7

Abstract: The compressive strength of mortar increased with the addition of the acid-treated MWCNTs; however, no

Keywords： carbon nanotubes     concrete     composites     nanomaterials     cement    

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reinforced concrete beams using fiber-reinforced cementitious matrix systems fabricated with custom-designed mortar

Frontiers of Structural and Civil Engineering   Pages 1100-1116 doi: 10.1007/s11709-023-0967-9

Abstract: performance of a new fiber-reinforced cementitious matrix (FRCM) system developed using custom-designed mortarand FRP systems and the higher load capacity of specimens strengthened by the former, cement-based mortar

Keywords： fiber-reinforced cementitious matrix     flexural strengthening     shear strengthening     carbon fiber-reinforced polymer     shear span    

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Effect of Mineral Powder on the Durability of Mortar and Concrete

Feng Naiqian,Niu Quanlin,Feng Xiaoxin

Strategic Study of CAE 2002, Volume 4, Issue 2,   Pages 69-73

Abstract:

In this paper, the effect of mineral powder and W/B ratio on the charge passed with mortar and concretecontent of mineral admixture, the charge passed through concrete is far lower than that through the mortarThe charge passed data of either mortar or concrete with mineral admixture are lower than that of theThe charge passed of mortar and concrete decreases with the decrease of W/B and increase of curing age

Keywords： mineral powder     mortar     concrete     charge passed    

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Assessing compressive strengths of mortar and concrete from digital images by machine learning techniques

Amit SHIULY; Debabrata DUTTA; Achintya MONDAL

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 3,   Pages 347-358 doi: 10.1007/s11709-022-0819-z

Abstract: In the present investigation, cement mortar samples were prepared using each of the cement:sand ratiospresent findings validated the use of machine learning models as an efficient means of estimating cement mortar

Keywords： support vector machine     deep convolutional neural network     microscope     digital image     curing period    

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Experimental study on dimensional effect of mortar cubic compressive strength

Su Jie and Fang Zhi

Strategic Study of CAE 2014, Volume 16, Issue 2,   Pages 88-92

Abstract:

The dimensional effect of mortar cubic compressive strength was investigated through compression experimentson mortar cubic specimens with the strength grade M30, M50 and M80 and specimen side length of 70 mm

Keywords： mortar     dimensional effect     strength grade     cubic compressive strength    

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Cement mortar with enhanced flexural strength and durability-related properties using

Qing LIU, Renjun LIU, Qiao WANG, Rui LIANG, Zongjin LI, Guoxing SUN

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 1,   Pages 99-108 doi: 10.1007/s11709-021-0721-0

Abstract: In this study, we developed a new polymer-modified mortar by polymerization of acrylamide (AM) monomers

Keywords： acrylamide     in situ polymerization     interaction     porosity     durability    

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Title Author Date Type Operation

Optimal Robust Control of AC Position Servo System for Multiple Rockets

Chai Huawei,Ma Dawei,Li Zhigang,Le Guigao,Wang Feng

Journal Article

Experimental investigation on concrete overlaid with textile reinforced mortar: Influences of mix, temperature

Journal Article

Mechanical properties and microstructure of multilayer graphene oxide cement mortar

Journal Article

Exploration of the Development Road for Chinese Liquid Rocket Engine in 21st Century

Wang Heng

Journal Article

XB High Accuracy Rocket Sled Test Track

Yang Xingbang

Journal Article

Experimental study and assessment of thermal energy storage mortar with paraffin/recycled brick powder

Luchen HAO; Jianzhuang XIAO; Wanzhi CAO; Jingting SUN

Journal Article

Astronauts Hitch First Ride Aboard Private Rocket to Space Station

Chris Palmer

Journal Article

Experimental study on behavior of mortar-aggregate interface after elevated temperatures

Wan WANG, Jianzhuang XIAO, Shiying XU, Chunhui WANG

Journal Article

microstructure, thickness, porosity and its relation with compressive and flexural strength of cement mortar

Journal Article

Acid-treated carbon nanotubes and their effects on mortar strength

M. ELKASHEF,K. WANG,M. N. ABOU-ZEID

Journal Article

reinforced concrete beams using fiber-reinforced cementitious matrix systems fabricated with custom-designed mortar

Journal Article

Effect of Mineral Powder on the Durability of Mortar and Concrete

Feng Naiqian,Niu Quanlin,Feng Xiaoxin

Journal Article

Assessing compressive strengths of mortar and concrete from digital images by machine learning techniques

Amit SHIULY; Debabrata DUTTA; Achintya MONDAL

Journal Article

Experimental study on dimensional effect of mortar cubic compressive strength

Su Jie and Fang Zhi

Journal Article

Cement mortar with enhanced flexural strength and durability-related properties using

Qing LIU, Renjun LIU, Qiao WANG, Rui LIANG, Zongjin LI, Guoxing SUN

Journal Article