Why did you end up with this mix of balsa wood and plastic? Shane Kyi Hla Win: The wing structure of a monocopter requires rigidity in order to be controllable in flight. Although it is possible for the monocopter to fly with more flexible materials we tested, such as flexible plastic or polymide flex, they allow the wing to twist freely mid-flight making cyclic control effort from the motor less effective. The balsa laminated with plastic provides enough rigidity for an effective control, while allowing folding in a pre-determined triangular fold.
Can F-SAM fly outdoors? What is required to fly it outside of a motion capture environment? Yes it can fly outdoors. It is passively stable so it does not require a closed-loop control for its flight. The motion capture environment provides its absolute position for station-holding and waypoint flights when indoors.
For outdoor flight, an electronic compass provides the relative heading for the basic cyclic control. We are working on a prototype with an integrated GPS for outdoor autonomous flights. A camera can be added we have done this before , but due to its spinning nature, images captured can come out blurry. A conventional LiDAR system requires a dedicated actuator to create a spinning motion. Your paper says that "in the future, we may look into possible launching of F-SAM directly from the container, without the need for human intervention.
Currently, F-SAM can be folded into a compact form and stored inside a container. However, it still requires a human to unfold it and either hand-launch it or put it on the floor to fly off. In the future, we envision that F-SAM is put inside a container which has the mechanism such as pressured gas to catapult the folded unit into the air, which can begin unfolding immediately due to elastic materials used.
The motor can initiate the spin which allows the wing to straighten out due to centrifugal forces. F-SAM could be a good toy but it may not be a good alternative to quadcopters if the objective is conventional aerial photography or videography.
However, it can be a good contender for single-use GPS-guided reconnaissance missions. As it uses only one actuator for its flight, it can be made relatively cheaply. It is also very silent during its flight and easily camouflaged once landed. Various lightweight sensors can be integrated onto the platform for different types of missions, such as climate monitoring. F-SAM units can be deployed from the air, as they can also autorotate on their way down, while also flying at certain periods for extended meteorological data collection in the air.
We have a few exciting projects on hand, most of which focus on 'do more with less' theme. This means our projects aim to achieve multiple missions and flight modes while using as few actuators as possible.
This platform, published earlier this year in IEEE Transactions on Robotics , is able to achieve two flight modes autorotation and diving with just one actuator. It is ideal for deploying single-use sensors to remote locations. For example, we can use the platform to deploy sensors for forest monitoring or wildfire alert system.
The sensors can land on tree canopies, and once landed the wing provides the necessary area for capturing solar energy for persistent operation over several years. Another interesting scenario is using the autorotating platform to guide the radiosondes back to the collection point once its journey upwards is completed.
Currently, many radiosondes are sent up with hydrogen balloons from weather stations all across the world more than 20, annually from Australia alone and once the balloon reaches a high altitude and bursts, the sensors drop back onto the earth and no effort is spent to retrieve these sensors.
By guiding these sensors back to a collection point, millions of dollars can be saved every year—and also [it helps] save the environment by polluting less. In a continuation from our previous webinar within the Road to 6G Webinar Series, we will look at the impact of the specifications of Release 17 on testing and measurement.
The new features for Release 17 all into three main categories:. These new features will require new capabilities that will need to be tested. This webinar will examine strategies for testing these features to ensure they meet their expected capabilities. Explore by topic. The Magazine The Institute. IEEE Spectrum. Our articles, podcasts, and infographics inform our readers about developments in technology, engineering, and science.
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Telecommunications Topic Type Feature. Illustration: Mark Montgomery The problem has bedeviled designers for decades: How do you squeeze more and more antennas into smaller and smaller mobile devices?
All Together Now When laptops use traditional antennas, they are distributed along the edge of the device to minimize signal blockage, spaced as widely as possible to reduce interference with one another. Following antenna parameters are very useful in choosing the right one for your application. It includes resonant frequency, polarization, impedance, radiation pattern, efficiency, directivity and gain of the antenna.
Refer antenna tutorial to know more about antenna concepts and terminologies. The receiving requirements for the primary cell antenna are: TIS - In addition to TRP, the cellular carriers set minimum specifications for the amount of Total Isotropic Sensitivity TIS for every frequency band the phone will operate in. TIS is a function of the radio's conducted sensitivity, the antenna efficiency, and desense. We also need to know what frequencies the antenna will work at. The primary cellular antenna will typically have both a lowband somewhere between and MHz , and a highband somewhere between and MHz.
A phone that is developed for the U. Some companies try to develop world phones that support all bands, which greatly complicates the antenna design. Its aim is to simplify connections between electronic devices by bypassing cables. It can be used to replace cables between computers, tablets, speakers, mobile telephones between one another or with printers, scanners, keyboards, mice, game pads, portable phones, personal assistants, hands-free microphone or earphone systems, radios, digital cameras, bar code readers and interactive advertising booths.
With some mobile phone models, it is already being used for paying and validation of transport tickets, and could eventually replace credit cards see here opens in a new window an example of NFC application. It allows automatic detection with reading distances greater than for NFC. LoRa is a long-range network technology which supports low bandwidth communication between connected objects. The great advantage of LoRa, compared with a conventional cellular network, is the autonomy of receivers as well as the cost of use.
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