Serial Communication Interface for UAV Throttle Control
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Solution Overview
Problem
Existing accelerator control methods for unmanned aerial vehicles (UAVs) suffer from long control cycles and poor accuracy, failing to meet the requirements for higher control frequencies and precision.
Innovation Solution
Implementing a serial communication interface between the electronic speed control (ESC) and the accelerator controller, using digital accelerator signals with high baud rates to achieve shorter control cycles and increased control frequencies, thereby enhancing control accuracy and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If pulse width modulation (PWM) signals are used for accelerator control, then the control method is simple and universal, but the control cycle is long and accuracy is poor
Solution Approach 1:
The patent replaces the traditional PWM signal transmission method with a serial communication interface that transmits digital accelerator signals. This substitution eliminates the need for pulse width measurement and conversion, directly transmitting control data in a digital format that can be processed at higher frequencies with greater precision, thereby resolving the contradiction between control simplicity and control accuracy.
2Adaptability or versatility
If pulse width modulation (PWM) signals are used for accelerator control, then the control method is universal, but the control frequency is low
Solution Approach 1:
The patent substitutes the PWM signal mechanism with a serial communication interface that transmits digital signals. This allows for much higher control frequencies because digital serial communication can operate at higher baud rates without the timing and measurement constraints of PWM pulse width detection, thereby increasing control frequency while maintaining adaptability through standardized digital communication protocols.
3Measurement precision
If higher control frequencies and shorter control cycles are required, then control accuracy is improved, but the existing PWM method cannot meet these requirements
Solution Approach 1:
The patent replaces the PWM signal transmission system with a serial communication interface that transmits digital accelerator signals. This substitution enables higher control frequencies and shorter control cycles because digital serial communication can transmit data at much higher rates without the timing constraints of pulse width measurement, directly achieving improved control accuracy through increased control frequency capability.
Data Source
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AI summary
The present application relates to an accelerator control method and device, a power system and an unmanned aerial vehicle (UAV). The method includes: receiving, by an electronic speed control (ESC), an accelerator signal through a serial communication interface; extracting accelerator control data from the accelerator signal; generating, according to the accelerator control data, a motor control signal for controlling operation of a motor; and transmitting the motor control signal to the motor. The accelerator signal received through the serial communication interface is a digital signal subjected to small interference during transmission, unlike an analog signal that is susceptible to interference such as impedance and capacitive reactance, which causes data inaccuracy. In addition, in the manner of serial communication, a higher baud rate may be adopted to shorten an accelerator control cycle, thereby achieving high-speed control of an accelerator and increasing the control frequency.