Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE credits
The Orbital Systems Company faces the really important issues such a lack of water, sewerage and even public health infrastructure. Its proposition of the Shower of the Future, which is a high-tech purification system that recycles water was inspired by the NASA, spaceship technology with limited sources of water and can be the solution of these problems. Due to the patented technology, which bases on the special filters, it is possible to reuse water. This idea, which is used in the shower, allows on more than 90% savings in water usage and 80% savings in energy, while producing water that is cleaner than average tap water. The company aims to provide this special technology not only to the hotels or hospitals, but also to the regular house to maintain the sustainability issue and even achieve the economic profit.
The Shower of the Future is a new technology still in the developing phase. To achieve the goals of the company, in the software part of the system, two important problems have to be solved. First of them is the management issue. At this moment, three different versions of the showers, which differ in hardware and in software are in used. Much more versions adjusted to the place of destination such as hotel or hospital are planned. To manage the codes and integrate all of the possible version of the shower, the company desires to create one compatible software to control all of them. The mechanisms to integrate the codes by managing the configurable parameters of the system and to auto detect the version of the shower are proposed in the work.
The second company’s issue is the improvement of the control system. As performed research and tests show, the temperature control in the Shower of the Future is too slow and inaccurate. To solve this problem, the identification process of the model was conducted and the PID controllers for the heater were designed. Due to specific structure of the shower, which introduce delays and disturbances, a single PID controller is not sufficient to maintain the control system. As a final controller, the switching PID controller created from previously designed PID controllers is proposed. Thanks to it, the temperature rising time is reduced 2 times, the overshoot, which was equal to 5 °C does not appear and the steady state error is diminished. Thanks to improvement of the temperature control system, much less water is wasted and much more energy is saved.
The Shower of the Future of the Orbital System, which nevertheless needs improvements and more work, is only the first step in creating a new paradigm for daily water usage. The company and its product seriously consider the sustainability and environment aspect.
2017. , 103 p.
ET2566 Master's Thesis (120 credits) in Electrical Engineering with emphasis on Signal processing
ETASB Master of Science Programme in Electrical Engineering with emphasis on Signal Processing