The Synchronization Mechanism for Solar Array with a Three

GF-3 is a satellite operating on dawn-dust orbit, equipped with two deployable solar array wings[1]. There is a particular layout of the solar array, characterized by the axis of rotation of the solar array drive mechanism parallel (rather than the more common normal) to the mounting surface of the solar array on the satellite.

Design Selection and Installation of Solar water Pumping

The solar water pump could be either a dc powered pump (Figure 2) or an ac power pump (Figure 3). Figure 2: DC powered pump Figure 3: AC powered pump The "pump controller" in the dc powered pump system would typically include a maximum power point tracker (MPPT) to ensure that the solar array is delivering power at its peak power point.

Integrated Disturbance Observer Attitude Controller for a Satellite

In this paper, the response of on-orbit satellite attitude under the influence of flexible satellite''s solar array rotation is analysed, and a robust attitude control method based on disturbance observer is proposed. The disturbance torque is estimated and compensated feedforward. The simulation results show that the proposed control method can effectively estimate the external

InfraCo Africa & Solveo Energie sign PPA for Guinea''s

The solar energy facility will be the first grid-connected solar photovoltaic (PV) array in Guinea. The project is being developed by InfraCo Africa with the support of Aldwych Africa Developments Ltd, in partnership

Modeling and Rotating Speed Control of the Sun-Tracking

The rotating speed fluctuation of the flexible solar array in the process of tracking the sun will affect the accuracy of the solar array pointing to the sun and the safety of the spacecraft in orbit. In this paper, the flexible solar array and its drive mechanism are modeled as a whole. According to the characteristics of the dynamic model, this paper proposes a sliding mode control method

Integrated Disturbance Observer Attitude Controller for a Satellite

[1] Si Z H and Liu Y W 2010 High accuracy and high stability attitude control of a satellite with a rotating solar array Journal of Astronautics 12 2697-2703 Google Scholar [2] Qin H 2015 Experimental study on the attitude control of spacecraft with flexible solar arrays (Beijing: Beijing Institute of Technology) Google Scholar [3] Lv J T and Li C J 2008 A sliding mode PID

Satellite self-damping Solar Array Deployment Mechanism

The solar array outer dimensions are shown in fig.5. The solar array mass moment of inertia 𝐼𝑆.𝐴 is calculated: 𝐼𝑆.𝐴=𝐼 = ( 2+ 2) 12 =9 5 𝑘 .𝑚𝑚^2 (8) Minertia(S.A)=294.2 .𝑚𝑚 (9) 5 solar panel dimensions The rotating part mass moment of inertia of rotating part .𝑝

What is a solar tracker and is it worth the investment?

A solar tracker is a device that follows the sun as it moves across the sky. When solar trackers are coupled with solar panels, the panels can follow the path of the sun and produce more renewable energy for you to use. Solar trackers are usually paired with ground-mount solar systems, but recently, rooftop-mounted trackers have come onto the

Integrated Disturbance Observer Attitude Controller for a Satellite

The attitude of satellite is disturbed under the influence of step motor driving during the period of solar array pointing to the sun. Considering the coupling disturbances with satellite attitude

Khoumagueli Solar – InfraCo Africa

The Khoumagueli plant will be the first grid-connected solar power plant in Guinea and will deliver 40MW of clean power to Guinea''s national grid. Using existing grid infrastructure, Khoumagueli will also be well-positioned to enable a

NASA-TP-251119850025835 Paper 2511

The solar arrays and thermal radiators of the Space Station are required to maintain a specific alignment with the sun, whereas the main body in the rotating reference frame by the well-known relation: Figure 1. Space Station (Power Tower configuration). z p Figure 2. Inertial and moving reference frames.

Rotating Prism Array for Solar Tracking

ISES Solar World Congress Rotating Prism Array for Solar Tracking Noel León a, Carlos Ramírez a, Héctor García a,* a Tecnológico de Monterrey, Eugenio Garza Sada 2501, Monterrey, N.L., México Abstract Solar energy has become one of the most promising renewable energies being the most widespread used nowadays.

Attitude Feed-Forward Control for a Satellite with a Rotating Solar Array

The attitude control of a satellite under the influences induced by solar array driving is studied in this paper.There exists a fluctuation of driving speed of solar array,so the attitude is affected due to the coupling function.Based on the model of solar array driving issued before,the driving speed of solar array is analyzed.Then through offline fit and online estimation,combining with the

Modeling and disturbance suppression for spacecraft solar array

The solar array system, composed of the solar array and solar array drive assembly (SADA) installing on the spacecraft platform, is a major power supply device for spacecraft in orbit. which is demonstrated to compensate for the fluctuation of the rotating speed effectively and reduce the residual vibration of the solar arrays. Azimi and

Modeling for solar array drive assembly system and compensating for

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. The dynamic equations of the system are derived by

Guinea''s first grid-connected solar project signs PPA

The independent power producer (IPP) project will be the first grid-connected photovoltaic (PV) array in Guinea. The PPA milestone was announced on Wednesday by InfraCo Africa, which is developing the project

Active control technology for flexible solar array disturbance

The satellite attitude is disturbed by uneven movement of the solar array driven by traditional stepper motor assembly. In order to reduce the attitude disturbances resulting from solar array drive mechanisms of high-resolution satellites, permanent magnet synchronous motors are employed as driving units. The flexible modes of the solar array directly connected with the

Solar Trackers

Solar trackers tilt the angle of solar panels throughout the day, maximising generation by an extra 25%. Find out how they work & if they''re right for you. All solar tracking systems will cost more money up front than a fixed array, due to the complexity of the technology. With moving parts, they come with added maintenance costs.

Khoumagueli Solar Power Station

SummaryLocationOverviewDevelopersSee alsoExternal links

The Khoumagueli Solar Power Station is a 40 MW (54,000 hp) solar power plant under development in Guinea. When completed, it is expected to be the largest grid-connected, privately funded solar power plant in the country.

Guinea signs contract for first grid-connected solar

UK-based InfraCo Africa and France-based Solvéo Energie have signed a 25-year power purchase agreement (PPA) with Guinea''s national power utility, Electricité de Guinée (EDG), ahead of the country''s first on-grid

Homer J. Fincannon NASA Glenn Research Center Solar

For lunar polar bases, the lightest power generation available is from solar arrays. Solar arrays can take advantage of long sunlight periods (up to 6 continuous months a year) in favorable locations to generate one axis vertical rotating gimbals are adequate for most solar array concepts. It is possible to have stationary/fixed, non

Why do satellite solar arrays misalign from each other?

Normally the satellite body points to Earth so, in inertial terms, the body is rotating once per day. The solar arrays stick out North and South and have one drive motor each and thus can track the sun whilst the satellite body rotates. However, the sun''s relative path is not in the Earth''s equatorial plane.

Singular formalism and admissible control of spacecraft with rotating

DOI: 10.1016/J.CJA.2013.12.010 Corpus ID: 123241400; Singular formalism and admissible control of spacecraft with rotating flexible solar array @article{Lu2014SingularFA, title={Singular formalism and admissible control of spacecraft with rotating flexible solar array}, author={Dongning Lu and Yiwu Liu}, journal={Chinese Journal of Aeronautics}, year={2014},

Modeling for solar array drive assembly system and compensating for

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. [16] 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. Zribi

Rotating Prism Array for Solar Tracking

Selection and/or peer-review under responsibility of ISES. doi: 10.1016/j.egypro.2014.10.031 2013 ISES Solar World Congress Rotating Prism Array for Solar Tracking Noel León a, Carlos Ramírez a, Héctor García a,* a Tecnológico de Monterrey, Eugenio Garza Sada 2501, Monterrey, N.L., México Abstract Solar energy has become one

The Benefits of Rotating Solar Panels: Maximizing Sun Exposure

Rotating Solar Panels: Ideal Applications and Optimal Settings. Rotating solar panels are changing how we use solar energy beyond just homes. They work well with Time of Use (TOU) rates, making both large and small solar systems more effective and cost-efficient. The use of solar panel tilt trackers is a big leap forward.