Guided rocket recovery prepares for a soft landing
Summary
This year, our subteam of eight people tackled another challenge: Guided recovery of a rocket after separation at apogee, which means having the system autonomously recover from its highest point in flight to a predefined location. From last years teams we already heard about Tracealyzer and how this debugging tool had helped them to spot and shave considerable time off certain logging tasks. Of the many things we learned these two stand out: Control of parachute-payload systems depends on having a good model that accurately captures the relevant aerodynamic effects, the dynamics between parachute and payload, and the influence of wind. In the end, we could single down on the tradeoff between RAM usage and performance that proved optimal for our purposes, and we could achieve our desired sampling rate. Increased noise from other components made the STM32F4 unable to recognise the response and it was timing out on the UART transmission, delaying our control loop!
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