FLIGHT MEASUREMENT SCHEME IN RLV-TD

L. Dayaanandu; J. Muthupandian; T. Sivamurugan; M. Jayakumar; N. Shyam Mohan; R. Rajkumar; Xavier Raja

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FLIGHT MEASUREMENT SCHEME IN RLV-TD

机译：RLV-TD中的飞行测量方案

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Reusable Launch Vehicle - Technology Demonstrator (RLV-TD) is a experiment vehicle to demonstrate technologies required for a reusable launch vehicle. Flight instrument is critical to collect data from the experimental vehicle. It is through instrumentation, flight performance of different subsystems is monitored. This paper gives a glimpse of what is measured in maiden hypersonic flight, why it is measured, and how the installation is done. Complexity of instrumentation system mirrors the phases of the mission. The mission started with low sub sonic regime then passed through transonic, supersonic and attained hypersonic velocity and decelerated finally to low subsonic. Instrumentation system should be able to work and perform its intended function in all phases. Data obtained during the flight is the one of the significant inputs for future RLV missions. Flight environment is continuously monitored till touch down by means of different transducers mounted in hardware. The parameters measured include pressure, temperature, heat flux, acceleration, vibration and acoustics. Sensor location is decided based on the sub system level tests and pre flight prediction. However, accuracy of sensor output is determined by correctness of sensor installation. Final location is decided by integration feasibility and other sub system interface. All sensors are qualified for their health before flight.

机译：可重复使用的运载工具-技术演示器（RLV-TD）是一种实验工具，用于演示可重复使用的运载工具所需的技术。飞行仪器对于从实验飞行器收集数据至关重要。通过仪器，可以监视不同子系统的飞行性能。本文简要介绍了首次超音速飞行中的测量内容，测量原因以及安装过程。仪器系统的复杂性反映了任务的各个阶段。任务从低亚音速开始，然后经过跨音速，超音速并达到高音速，最后减速至低亚音速。仪器系统应该能够在所有阶段工作并执行其预期的功能。飞行中获得的数据是未来RLV任务的重要输入之一。通过安装在硬件中的不同传感器，持续监控飞行环境，直到降落。测得的参数包括压力，温度，热通量，加速度，振动和声学。传感器的位置取决于子系统级别的测试和飞行前的预测。但是，传感器输出的精度取决于传感器安装的正确性。最终位置由集成可行性和其他子系统接口决定。所有传感器在飞行前都符合其健康要求。

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来源
《Journal of Aerospace Sciences and Technologies》 |2017年第3a期|413-422|共10页
作者
L. Dayaanandu; J. Muthupandian; T. Sivamurugan; M. Jayakumar; N. Shyam Mohan; R. Rajkumar; Xavier Raja;
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作者单位

RLV-TD Project Vikram Sarabhai Space Centre (VSSC) Department of Space, ISRO Post Thiruvananthapuram-695 022, India;

RLV-TD Project Vikram Sarabhai Space Centre (VSSC) Department of Space, ISRO Post Thiruvananthapuram-695 022, India;

RLV-TD Project Vikram Sarabhai Space Centre (VSSC) Department of Space, ISRO Post Thiruvananthapuram-695 022, India;

RLV-TD Project Vikram Sarabhai Space Centre (VSSC) Department of Space, ISRO Post Thiruvananthapuram-695 022, India;

RLV-TD Project Vikram Sarabhai Space Centre (VSSC) Department of Space, ISRO Post Thiruvananthapuram-695 022, India;

RLV-TD Project Vikram Sarabhai Space Centre (VSSC) Department of Space, ISRO Post Thiruvananthapuram-695 022, India;

RLV-TD Project Vikram Sarabhai Space Centre (VSSC) Department of Space, ISRO Post Thiruvananthapuram-695 022, India;

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正文语种 eng
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关键词
Thermal Protection System (TPS); Accuracy; Smart Sensor; Acoustic Sensor; Array Sensor;

机译：热保护系统（TPS）;准确性;智能传感器声学传感器阵列传感器;

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1. Aerodynamic design, characterization and flight performance of RLV-TD [J] . Vidya G., Manokaran K., Ganesan V. R., Current Science: A Fortnightly Journal of Research . 2018,第1期

机译：RLV-TD的空气动力学设计，表征和飞行性能
2. AERODYNAMIC DESIGN, CHARACTERISATION AND PARAMETER ESTIMATION OF RLV-TD FROM FLIGHT DATA [J] . G. Vidya, V.R. Ganesan, M.M. Patil, Journal of the Aeronautical Society of India . 2017,第3a期

机译：飞行数据对RLV-TD的气动设计，表征和参数估计
3. RLV-TD Flight Measured Aeroacoustic Levels and its Comparison with Predictions [J] . K. Manokaran, M. Prasath, B. Venkata Subrahmanyam, Journal of The institution of engineers (India), Series C . 2017,第6期

机译：RLV-TD飞行测量了机动水平及其与预测的比较
4. High precision, accuracy, and resolution of 3D laser scanner employing pulsed time-of-flight measurement High precision, accuracy, and resolution of 3D laser scanner employing pulsed time-of-flight measurement High precision, accuracy, and resolution of 3D laser scanner employing pulsed time-of-flight measurement [C] . Martin Pfennigbauer Andreas Ullrich and Jo?o Pereira do Carmo Conference on laser radar technology and applications . 2011

机译：高精度，精度和分辨率的3D激光扫描仪采用脉冲飞行时间测量的高精度，精度和分辨率，3D激光扫描仪采用脉冲飞行时间测量的高精度，精度和3D激光扫描仪的分辨率脉冲飞行时间测量
5. Pilot in loop assessment of fault tolerant flight control schemes in a motion flight simulator. [D] . Sagoo, Girish Kumar. 2008

机译：在运动飞行模拟器中对容错飞行控制方案进行先导循环评估。
6. Feather Corticosterone Measurements of Greater Flamingos Living under Different Forms of Flight Restraint [O] . Lukas Reese, Katrin Baumgartner, Lorenzo von Fersen, 2020

机译：在不同形式的飞行约束下生活的大火烈鸟的羽毛皮质酮测量
7. Endothermy of dynastine scarab beetles (Cyclocephala colasi) associated with pollination biology of a thermogenic arum lily (Philodendron solimoesense) : Cyclocephala colasi beetles are facultative endotherms that spend most of their adult lives inside the inflorescences of Philodendron solimoesense, where ambient temperature (Ta) averages about 28°C due to floral thermogenesis. Measurements of respiration within a range of Ta showed that active beetles became spontaneously endothermic at Ta below 28°C but were rarely endothermic above it. There was no evidence of endothermy within the inflorescences, indicating that activities in the floral chamber can occur without the high energy expense of endothermy. Bouts of endothermy occurred at lower Ta in respirometer chambers mainly in the evening, when the insects normally fly from one inflorescence to another, and during the night, when they normally eat and mate within the inflorescence. Patterns of endothermy in individual episodes were studied in non-flying beetles with respirometry and infrared thermal imaging. Heat was generated in the thorax by oscillatory waves of respiration that were coupled with thoracic temperature (Tth) increases. Stationary beetles could regulate Tth at about 33°C independently of Ta between 16 and 29°C. At Ta20°C, this represents a 116-fold increase in metabolic rate over resting, ectothermic values. Endothermy was clearly a requirement for flight, and beetles departing inflorescences warmed to about 30°C before take-off. During flight, Tth was dependent on Ta, decreasing from 37 to 28°C at Ta of 37 to 20°C, respectively. The lowest Ta at which flight could occur was about 20°C. Thermal conductance of stationary, endothermic beetles increased at higher metabolic rates, probably because of increased ventilatory heat loss. [O] . Seymour, R.S., White, C.R., Gibernau, Marc 2009

机译：与产热香芋百合（Philodendron solimoesense）授粉生物学相关的动态圣甲虫（Cyclocephala colasi）吸热：Cyclocephala colasi甲虫是兼性吸热体，它们大部分成年生活都在Philodendron solimoesense的花序中，其平均温度（Ta）由于花的生热作用，温度约为28°C。在Ta范围内的呼吸测量表明，活跃的甲虫在Ta低于28°C时会自发吸热，而在Ta高于28°C时很少吸热。在花序中没有吸热的迹象，表明花室中的活动可以在没有高的吸热能量消耗的情况下发生。吸热的爆发主要发生在晚上，当昆虫通常从一个花序飞到另一个花序时，以及在晚上，它们通常在花序中进食并交配时，在呼吸计室的较低Ta处发生。在非飞行甲虫中通过呼吸测定法和红外热成像研究了单个发作中的吸热模式。伴随着胸温（Tth）升高的呼吸振荡波在胸腔中产生热量。固定甲虫可以在约33°C的温度下调节Tth，而与Ta在16至29°C之间的温度无关。在Ta20°C下，这表示其代谢速率比静止的，等温的升高116倍。吸热显然是飞行的要求，离开花序的甲虫在起飞前会升温到约30°C。在飞行过程中，Tth取决于Ta，在Ta从37降至20°C时，Tth分别从37°C降至28°C。可能发生飞行的最低Ta约为20°C。固定的，吸热的甲虫的热导率以较高的代谢率增加，这可能是由于通风热损失增加所致。

FLIGHT MEASUREMENT SCHEME IN RLV-TD

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