What is a dynamic model of a solar array drive assembly?
A dynamic model of the solar array drive assembly (SADA) system consisting of a stepper motor and two flexible solar arrays is investigated. The fluctuation compensation of the rotating speed and vibration suppression is studied by integrating the sliding mode control (SMC) method and input shaping (IS) technique.
What is a cooperative control method for a shaft with solar arrays?
Focusing on the two problems, this paper gives the analytical dynamic model for the shaft with solar arrays by using GMM, and proposes a cooperative control method for the SADA system, which combines the SMC with input shaping technique to suppress the vibration in the driving process. The organization of the paper is as follows.
What influenced the design of the GPM solar array drive assemblies?
Orbiter’s (LRO’s) thermal testing, influenced the design of the GPM Solar Array Drive Assemblies. This paper describes the TRMM anomaly, design and development aspects of the GPM SADA, its on-orbit health and performance, and finally techniques and orbital maintenance maneuvers followed by the Flight Operatio
How a rigid drive shaft with two solar arrays clamped on symmetrically?
The solar arrays of them are installed only on one side of the rigid platform. The model of a rigid drive shaft with two solar arrays clamped on symmetrically is a typical rigid–flexible coupled system, which can be considered as hub-beam or hub-plate model. The dynamic analysis on such model is often based on various discrete methods.
Can a stepper motor reduce vibration in a solar array?
Based on the electromechanical dynamics model of the stepper motor, a cooperative compensation scheme is designed to achieve the stability of solar arrays and the suppression of system vibration. Numerical results show that the driving speed is significantly influenced by the harmonic torque and the structural vibration of payload.
How do solar arrays work?
The solar arrays are driven by the SADA system to track the sun, of which the modeling and driving process have been focused on. Bodson et al. established the mathematical model of the permanent magnet (PM) stepper motor and used the exact linearization methodology to develop a control law for the high-performance positioning.
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The installation of other engine parts, such as the engine, transmission, shaft, blade, and cover, includes the engine frame. The engine frame must be developed and constructed with the strength ...
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Keywords: Solar System, conveyer mechanism, box moving, mechanical linkage, etc. 1. Introduction Box moving or shifting set up has a simple mechanism, operating with crank and links arrangement in system. As by the electric motor rotary motion is
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Spacecraft tracking-drive flexible systems (STFS) consist of drive mechanisms and flexible structures, including solar array and a variety of large-scale antennas. The...
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The results showed good thermal insulation by reducing thermal transmittance from 1.87 W/m2K to 1.27 W/m2K, the effective sensor system performance of the constructed system, providing continuous ...
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Box moving or shifting set up has a simple mechanism, operating with crank and links arrangement in system. As by the electric motor rotary motion is converted into the …
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It is found that oil filling pressure has a significant effect on speed drop, while the engine speed has a significance on the dynamic load and sliding friction. ... "A Study on improving the shift quality of hydro-mechanical transmission by electronic-control system," Journal of Beijing Institute of Technology, vol. 22, no. 1, pp. 36–39 ...
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The new methodology proposed here is a sequential shifting control for twin-engine rotorcraft that coordinates the disengagement and engagement of the two turboshaft engines …
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How do you measure the rotational speed of a galaxy, taking into consideration the motion of our galaxy, solar system, planet, etc.? Chris Mathews Plano, Texas
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The present work investigates the water production from a solar desalination system utilizing a high-speed rotary humidifier at various droplet slot diameters and different high speeds. ... The study''s outcomes reveal the remarkable efficacy of the enhanced solar system featuring the TO-LHTES unit, particularly with specific configurations ...
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Water production from a solar desalination system utilizing a high-speed rotary humidifier. Author links open overlay panel Ammar S. Easa a b, Salwa M. Mohamed a, Waheed S. Barakat a, ... Also, the hybrid systems with a single solar still system produced almost 200% more than the traditional one and produced 66.3 kg/day. In addition, the cost ...
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Recent years have seen the development of several new types of transmissions that have already made it into volume production. Automated manual transmissions, double clutch transmissions and CVTs have joined the conventional "manual transmissions" and "automatic transmissions with torque converters". With its innovative components and systems, Schaeffler …
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Abstract: A high stability servo control scheme with motion planning and vibration suppression is proposed for solar tracking control of the space station''s solar alpha rotary joint (SARJ). The …
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A 3-speed magnetic hub transmission, including a low-speed gear, a direct-drive gear, and a high-speed gear, is designed and installed in the rear hub of a bicycle, which allows the rider to ...
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