# The Research of Complex Product Design Process Model under the Concept of Self-Recovery
## 5 Engineering Examples
### Self-Regulation Function Design of Intelligent Photovoltaic Power Generation System  
The existing product of the intelligent photovoltaic power generation system is the solar tracking system. Summarize the problems that occurred in the solar tracking system and predict the potential problems of the intelligent photovoltaic power generation system. After analysis, the main functions of the intelligent photovoltaic power generation system are \"store electricity\" and \"transform solar energy\". The \"store electricity\" function is stable, but \"transform solar energy\" is unstable, which is affected by the floating dust in the environment. To maintain the normal operation of the intelligent photovoltaic power generation system, add the self-regulation function to the \"solar energy conversion\" function. Figure 11: Function structure of the intelligent photovoltaic power generation system. \begin{table}
\begin{tabular}{c c c c} \hline \hline
**Element** & **Corresponding Function** & **Value of Functional Level** & **Calculation Rules** \\ \hline solar panel & transform solar energy & \(A_{0}+A_{1}+A_{1}=11\) & \\ battery & stored electricity & \(A_{0}=5\) & \\ control system & interactive data (drive motor 1) & \(A_{2}+A_{2}=4\) & \\ control system & interactive data (drive motor 2) & \(A_{2}+A_{2}=4\) & \(A_{3}=1\) \\ light sensor & detect light intensity & \(A_{1}+A_{3}=4\) & \(A_{2}=2\) \\ posture sensor 1/2 & detect angle/orientation & \(A_{1}+A_{3}=4\) & \(A_{1}=3\) \\ wind direction sensor & detect wind direction & \(A_{1}+A_{3}=4\) & \(A_{0}=5\) \\ wind speed sensor & detect wind speed & \(A_{1}+A_{3}=4\) & \\ motor 1, 2 & change angle/orientation & \(A_{1}=3\) & \\ voltage sensor & detect voltage & \(A_{1}=3\) & \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Self-recovery priority of the intelligent photovoltaic power generation system. First, predict the parameters corresponding to the self-regulation function of the system using the LT matrix. The problems that occur in \"transform solar energy\" can be described as follows: The environment contains a large amount of dust. When the dust contacts the solar panel, the solar panel will be deformed at the micro level. The dust will gather on the surface of the solar panel, causing the photosensitive area to decrease. The parameter of the problem is extracted as the area (L\({}^{2}\)T\({}^{0}\)). The semi-effective solution to this problem can be described as follows: The solar panel is an ideal rigid body with an infinite elastic modulus. When the dust contacts the battery panel, the panel will not produce any deformation, so the dust cannot gather and adhere and will naturally fall under the action of gravity. The extracted semi-effective solution parameter is the elastic modulus (L\({}^{2}\)T\({}^{-4}\)). According to Formula (1), the LT parameter corresponding to the self-regulation function is L\({}^{4}\)T\({}^{-4}\). In the LT matrix, the physical parameters corresponding to the LT parameters are \"force\" and \"temperature gradient\". Since the working environment of the intelligent photovoltaic power generation system is outdoors, it is not practical to use the temperature gradient for cleaning, so the LT parameter is converted into the physical parameter \"force\". A total of 82 effects are obtained by searching the parameter \"force\" in the effect library and recorded as set \(A\). After the parameter-effect retrieval is completed, the function-effect retrieval is supposed to be carried out by using the effect library, and the intersection of the two will be taken to narrow the effect selection range. Select \"converse solar energy to electric energy\" in the effect library software. A total of four effects are obtained and recorded as set \(C\). The cause for the problem of \"transform solar energy\" is dust adhesion. Therefore, select \"remove divided solid\" in the effect library software, and a total of 90 effects are obtained, which are recorded as set \(B\).