International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 09 Issue: 11 | Nov 2022
p-ISSN: 2395-0072
www.irjet.net
CRASH AVOIDANCE SYSTEM FOR DRONES R.Snehith1, Vaibhavi Karanth2, Shikha Rai A3 Students, Department of Electronics & Communication Engineering, Sahyadri College of Engineering & Management, Mangalore, India 3Asst Professor, Department of Electronics & Communication Engineering, Sahyadri College of Engineering and Management, Mangalore, India ---------------------------------------------------------------------***--------------------------------------------------------------------communication link with the flight control system. The Abstract - Several factors must be considered to ensure a 1,2
crash avoidance system for drones is implemented where additional logic is combined externally with Pixhawk and the configuration is being made to change from quadcopter to tricopter when the motor breaks down. The dedicated switch in the transmitter is signaled for changing the configuration. Once the Pixhawk gets this signal, the drone seamlessly transitions to tri-mode. At this stage, the drone is working on a tricopter configuration state where it will consider only 3 inputs for the motors. Once the drone is in this state the only goal is to land the drone in a secure and sound manner, the pilot will have control over the drone and the drone will respond in a very subtle manner which will help the drone to be stable and take the inputs from the pilot at the same time. Lately, we can see the applications of drones in many fields, varying from medical, agriculture to the military and losing one would be the greater loss.
safe flight while a drone is in the air, there are times when one of the drone's motor does not respond or does not work at all. In this instance, the drone loses its stability and crashes into the ground at a high velocity, potentially causing harm to both the drone and its surroundings. Drones are high-priced pieces of equipment used in a variety of sectors for a variety of purposes, and losing drones on a frequent basis can be expensive. The presented methodology tackles this issue by focusing on both software and hardware perspective, in contrast to the existing strategy, which is primarily focused on software. We're aiming to convert a quadcopter to a tri-copter by developing a system that responds to this situation by altering the drone’s configuration via manual signal sent by the pilot and backed by an externally linked circuit to the flight controller. This technique provides the pilot control over the drone during the fail safe mechanism which switches the configuration to tri-copter, unlike the conventional fail safe systems, which ceases the control from pilots in many occasions. This solution ensures that the drone will do no harm to the surroundings or to itself by landing on the desired coordinates.
2. LITERATURE SURVEY Lee, Seung Jae et.al [1] explains a quadcopter failsafe flying system that can fly with the four controlled DOF as a typical quadcopter even if a failure occurs in one of the arms. The new method makes use of the T 3 -Multirotor, a novel multirotor platform that applies a unique strategy of actively manipulating the center of gravity to recover controlled degrees of freedom. A specific control structure is introduced, as well as a thorough examination of the platform properties as they alter during emergency flights. The practicality of the suggested method is validated using experimental data.
Key Words: Robotics, UAV, Pixhawk 1. INTRODUCTION A multi-rotor is a system that controls its aerial mobility by using thrust force produced by many fixed pitch propellers. Because the thrusters on the multirotor are all oriented vertically, the horizontal steering system of the platform requires fuselage attitude management, which would be the process of supplying a fraction of the thrust horizontally. The common hardware configurations, a quadrotor arrangement with four propellers is the minimum standards for a steady flight, and sustaining a smooth ride is exceedingly difficult if one or even more quadcopter thrusters fail. The ability to control the speed and rotation of the motor is critical in the construction of a drone. An electronic speed control (ESC) manages these tasks, which includes a power distribution stage, a current-sensing circuitry, a microprocessor, and a
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B. Wang et.al [2] presents addressing simultaneous actuator defects, a unique adaptive sliding-mode based control allocation system. The suggested control method consists of two independent control modules, one for virtual control and the other for control allocation. The control allotment system is being used as a basic control module in fault-free as well as defective situations to allocate virtual command signal among the available motors. When several actuators fail at the same time, the control allocation and reallocation module may not be able
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