The team focus on performing tests this week. Generally speaking, the results we get are not satisfying, as we find some outputs are different from what we expect. We are keep trying to migitate those problem, and this could be a risk for us to finish the project. However, the user experience looks good as we keep using the mobile steering wheel to play the game.
Weight test:
Our project has a weight of 666g and our design goal is 400g. It seems we underestimate the weight of our components, and probably made a mistake when define the use case requirement: the joysticks we refer to do not have a big screen and a battery as large as ours, so we may want to change our use case requirement.
Battery life test:
Our project has a battery life for approximatly 4.5 hours, and our initial design aims to have 8 hours of battery life. The test results is generated from our measurement for the power consumption of our project for an average of 4W, and we have a rechargable 18.5Wh battery. The screen drains a lot of energy and we cannot add larger battery due to our trade-off between weight and battery life. I think we need to change our use case requirement for this, since 4.5 hours should be enough for normal players.
Latency test:
We plan to have around 30ms latency for the bluetooth connection. We use a slow motion to record the frames passed between the time we press a button and the time the computer receives it. In our camera has 240fps, our project takes around 28 frames to make response, which gives us a latency around 116-125ms. This differs a lot from our expection, and we are thinking if we should change our design requirement, as the experience of latency is not that large when playing with it.
Gyroscope drift test:
The target for the gyroscope tests are checking its stability and accuracy. The stability test requires the gyroscope to keep its drifting with in 1 degree. The result shows that the gyroscope output has some noises, but its avearge’s change is with in the 1 degree limit, as the data shown below gives us an average change within 0.8 degrees for 8 consecutive readings, and it’s not drifting away.
