The disturbance torque generated via solar array drive assembly(SADA) can significantly degrade the key performance of satellite.The discussed SADA is composed of a two-phase hybrid stepping motor and a set of two-sta...The disturbance torque generated via solar array drive assembly(SADA) can significantly degrade the key performance of satellite.The discussed SADA is composed of a two-phase hybrid stepping motor and a set of two-stage straight gear reducer. Firstly, the vibration equation of the two-phase hybrid stepping motor is established via simplifying and linearizing the electromagnetic torque.Secondly, based on the vibration equation established, the disturbance torque model of SADA is created via force analysis and force system simplification. Thirdly, for precisely ground measuring the disturbance torque aroused by SADA, a measurement system,including a strain micro-vibrations measurement platform(SMMP) and a set of gravity unloading device(GUD), is designed.Fourthly, the proposed disturbance torque model is validated by measuring and simulating the disturbance torque produced via SADA driving rigid load through GUD. The results indicate that, the proposed disturbance torque model holds the ability to describe the disturbance torque caused by SADA with high precision. Finally, the disturbance torque emitted by SADA driving a flexible load, designed to simulate solar array, is modeled and simulated via using fixed-interface mode synthesis method(FIMSM). All the conclusions drawn from this article do have a meaningful help for studying the disturbance torque produced by SADA driving solar array on orbit.展开更多
Objective To explore the effect of heat-reinforcing acupuncture combined with Bobath rehabilita on training for the gross motor func on measurement（GMFM） in children with cerebral palsy. Methods Sixty cases of cereb...Objective To explore the effect of heat-reinforcing acupuncture combined with Bobath rehabilita on training for the gross motor func on measurement（GMFM） in children with cerebral palsy. Methods Sixty cases of cerebral palsy were randomized into a heat-reinforcing acupuncture combined with rehabilitation training group（group A） and a rehabilitation group（group B）,30 cases in each group. Rehabilitation training was applied in group B and heat-reinforcing acupuncture was added in group A. Jiāji（夹脊 EX-B 2）,Jiānyú（肩髃 LI 15）,Qūchí（曲池 LI 11）,Hégi（合谷 LI 4）,Yánglíngquán（阳陵泉 GB 34）,Yīnlíngquán（阴陵泉 SP 9）,Xuánzhōng（悬钟 GB 39）,Zúsānli（足三里 ST 36）,Sānyīnjiāo（三阴交 SP 6）,Chéngshān（承山 BL 57）,Tài chōng（太冲 LR 3）,Tàixī（太溪 KI 3） and Shénmén（神门 HT 4） were chosen in group A and the heat-reinforcing acupuncture was applied once a day. For scalp acupuncture,Biihuì（百会 GV 20）,Sìshéncōng（四神聪 EX-HN 1）,Zhìsānzhēn（智三针）,Nǎosānzhēn（脑三针）,Nièsānzhēn（颞三针） and motor area（运动区） were punctured without any manipulation,once every other day,3 months as a treatment course and 2 courses were needed. GMFM were selected to assess the children with cerebral palsy before treatment,a er 3 months treatment and a er 6 months treatment. Results The total eff ec ve rate in group A was 70.00%（21/30）,which is superior to that of 60.00%（24/30） in group B（P0.05）. In group A,the GMFM scores of decubitus position and turn-over of body,creeping and kneeling,sitting,standing,walking,running and jumping after6 months treatment were significantly improved compared with that before treatment and after 3 months treatment（all P0.05）. In group B,above indices a er 6 months treatment were significantly improved compared with those before treatment,the standing score after 6 months treatment was significantly improved compared with that a er 3 month展开更多
文摘The disturbance torque generated via solar array drive assembly(SADA) can significantly degrade the key performance of satellite.The discussed SADA is composed of a two-phase hybrid stepping motor and a set of two-stage straight gear reducer. Firstly, the vibration equation of the two-phase hybrid stepping motor is established via simplifying and linearizing the electromagnetic torque.Secondly, based on the vibration equation established, the disturbance torque model of SADA is created via force analysis and force system simplification. Thirdly, for precisely ground measuring the disturbance torque aroused by SADA, a measurement system,including a strain micro-vibrations measurement platform(SMMP) and a set of gravity unloading device(GUD), is designed.Fourthly, the proposed disturbance torque model is validated by measuring and simulating the disturbance torque produced via SADA driving rigid load through GUD. The results indicate that, the proposed disturbance torque model holds the ability to describe the disturbance torque caused by SADA with high precision. Finally, the disturbance torque emitted by SADA driving a flexible load, designed to simulate solar array, is modeled and simulated via using fixed-interface mode synthesis method(FIMSM). All the conclusions drawn from this article do have a meaningful help for studying the disturbance torque produced by SADA driving solar array on orbit.
基金Supported by a project from Bureau of Public Health of Shanghai:2008 L 029 A
文摘Objective To explore the effect of heat-reinforcing acupuncture combined with Bobath rehabilita on training for the gross motor func on measurement（GMFM） in children with cerebral palsy. Methods Sixty cases of cerebral palsy were randomized into a heat-reinforcing acupuncture combined with rehabilitation training group（group A） and a rehabilitation group（group B）,30 cases in each group. Rehabilitation training was applied in group B and heat-reinforcing acupuncture was added in group A. Jiāji（夹脊 EX-B 2）,Jiānyú（肩髃 LI 15）,Qūchí（曲池 LI 11）,Hégi（合谷 LI 4）,Yánglíngquán（阳陵泉 GB 34）,Yīnlíngquán（阴陵泉 SP 9）,Xuánzhōng（悬钟 GB 39）,Zúsānli（足三里 ST 36）,Sānyīnjiāo（三阴交 SP 6）,Chéngshān（承山 BL 57）,Tài chōng（太冲 LR 3）,Tàixī（太溪 KI 3） and Shénmén（神门 HT 4） were chosen in group A and the heat-reinforcing acupuncture was applied once a day. For scalp acupuncture,Biihuì（百会 GV 20）,Sìshéncōng（四神聪 EX-HN 1）,Zhìsānzhēn（智三针）,Nǎosānzhēn（脑三针）,Nièsānzhēn（颞三针） and motor area（运动区） were punctured without any manipulation,once every other day,3 months as a treatment course and 2 courses were needed. GMFM were selected to assess the children with cerebral palsy before treatment,a er 3 months treatment and a er 6 months treatment. Results The total eff ec ve rate in group A was 70.00%（21/30）,which is superior to that of 60.00%（24/30） in group B（P0.05）. In group A,the GMFM scores of decubitus position and turn-over of body,creeping and kneeling,sitting,standing,walking,running and jumping after6 months treatment were significantly improved compared with that before treatment and after 3 months treatment（all P0.05）. In group B,above indices a er 6 months treatment were significantly improved compared with those before treatment,the standing score after 6 months treatment was significantly improved compared with that a er 3 month
