@article{MAKHILLJEAS201712114012,
    title = {Build and Design of Atmospheric Balloon Altitude Control Based on Multiwii},
    journal = {Journal of Engineering and Applied Sciences},
    volume = {12},
    number = {1},
    pages = {1-9},
    year = {2017},
    issn = {1816-949x},
    doi = {jeasci.2017.1.9},
    url = {https://makhillpublications.co/view-article.php?issn=1816-949x&doi=jeasci.2017.1.9},
    author = {Agit,Agus and},
    keywords = {Atmosphere balloon,Multiwii,ballast,payload,altitude control},
    abstract = {Atmosphere balloon for weather monitoring and research application have long been developed in
Indonesia. However, the lack of this atmosphere balloon were difficult to control for its movement. By reducing
the vertical movement of the balloon, it could controlled the balloon in certain altitude. Atmosphere balloon
altitude control that proposed in this research is by using air control method applied in a ballast totex balloon.
The control are conducted by filling the air into ballast using dual head pump NOOA-FRD and discharge the
air naturally using air pressure inside the ballast controlled by valve integrated with servo motor as an actuator.
If the uplift of the atmosphere balloon filled with hydrogen reaching zero due to the ballast, then balloon will
float in certain altitude above surface. Control activation process in the payload conducted wirelessly through
radio signal transmission in 433 MHz frequency. Combination of all the component with this method will result
a control system that able to resist the uplift of an atmosphere balloon, unfortunately this system in still
unstable on floating in the desired altitude. This system still needs to be developed in the part of filled and
discharge of the ballast more efficiently.}
    }