## 4 Results and Discussion
### Multi-Microwave Sources Collaborative Switching Heating
The power output trajectory of the microwave source is denoted as \(p_{i}(t)=2 square(0.1\times\pi t,\ 50 sawtooth(1.2\times\pi t))\), with a heating cycle of 20 s and duty cycle of \(P_{2}(t)/(P_{2}(t)+P_{1}(t))=0.5\); the time-frequency distribution of the output power aligns with the switching strategy (f), as shown in Figure 8. Excessive microwave power can cause changes in material properties due to the differences between SiC and potato, therefore, let \(P_{2}=300\) W, \(P_{1}=100\) W. The heating effects of potatoes are shown in Figure 10.  
In Table 5, it is demonstrated that the multi-microwave sources collaborative switching heating strategy, as described in this article, achieves 64.17% microwave energy utilization efficiency for potatoes; this efficiency is 20.3% higher than that achieved by the multi-microwave sources constant power strategy and surpasses the methods outlined in references [16; 29]. The heating strategy described in this article improves the potato's temperature uniformity by 20.82% under constant power heating, however, compared to continuous power heating, this improvement is lower than the 50.34% achieved with the heating strategy in \begin{table}
\begin{tabular}{c c c c} \hline
**Switching Strategies (Group)** & \(|S_{11}|\) & \(COV\) & \(\delta T\) (\({}^{\circ}\)C) \\ \hline Constant power heating group a & 0.4981 & 0.0117 & 33.900 \\ Experimental group b & 0.4769 & 0.0087 & 30.120 \\ Experimental group c & 0.4630 & 0.0076 & 17.816 \\ Experimental group d & 0.4660 & 0.0069 & 16.424 \\ Experimental group e & 0.4768 & 0.0066 & 15.502 \\ Experimental group f & 0.4449 & 0.0072 & 17.273 \\ Experimental group g & 0.4669 & 0.0073 & 17.335 \\ Experimental group h & 0.4561 & 0.0069 & 16.206 \\ Experimental group i & 0.4739 & 0.0076 & 17.693 \\ \hline \end{tabular}
\end{table} 
Table 4: Heating effect parameters of SiC under different switching strategies in multi-microwave sources systems. However, compared to references [16; 29], this paper has the following advantages: (i) employing an event-triggered strategy to reduce system communication frequency and conserve system computing power. (ii) Optimizing the control architecture of the intelligent agent system to enhance its resistance to DoS attacks, the system should maintain stability even under uncertain communication conditions and improve the controller's ability to withstand interference in high-frequency electromagnetic environments such as microwave heating systems. (iii) The heating strategy described in this article only has the magnetron's high and low power states. It offers higher operability and more direct control than the time-varying power heating strategy. In comparison to reference [25], this article focuses on optimizing the control architecture of multi-agent systems, which provides stability conditions for intelligent agents operating under uncertain communication conditions, reduces control variables, and utilizes low-power states to prevent the magnetrons from operating at zero power, thus enhancing the energy utilization efficiency of materials. The multi-microwave sources collaborative switching heating strategy improves material temperature uniformity compared to the traditional constant power heating model. However, the extent of this improvement is relatively small compared to references [16; 29]. However, under the same conditions, the heating method described in this article has the highest energy utilization efficiency. Multi-microwave sources effectively improve energy utilization efficiency and reduce heating time. The main reasons are analyzed as follows: While ensuring the same total power input for heating, the microwave power is periodically switched; the high-power state of the switching system is mainly concentrated in the first half of the heating cycle, which causes the material temperature to increase rapidly.