Optimizing Parameters of Signal Temporal Logic Formulas with Local Search

Aydin, Sertac Kagan
Aydın Göl, Ebru
Signal temporal logic (STL) is a formal language for expressing temporal and real-time properties of real valued signals. In this paper, we study the problem of generating an STL formula from a labeled dataset. We propose a local search algorithm to synthesize parameters of a template formula. Starting from a random initial point, the parameter space is explored in the directions improving the formula evaluation. In addition, the local search method is integrated to the genetic algorithms developed for formula synthesis as the adaptation step. The findings of the paper are shown on a case study and compared with the previous results, which shows that the adaptation step improves the convergence.


Synthesis of signal temporal logic formulas with genetic algorithms
Aydın, Sertaç Kağan; Aydın Göl, Ebru; Department of Computer Engineering (2019)
Signal Temporal Logic (STL) is used to reason about the behavior of continuous signals. Due to its expressivity and algorithms to generate signal monitors, it is used to define monitoring rules for hardware and software systems. However, it is a hard task to define an STL formula that describes the system behavior. An expert of the monitored system should write the formula and optimize its parameters to minimize the monitoring errors (false alarms and missed alarms). To simplify and disseminate the use of f...
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In this work, we studied use of genetic algorithms to synthesize Signal Temporal Logic formulas from a labeled data set. In the synthesis problem, the goal is to generate the best STL formula representing the labeled signals in the set. To use genetic algoritms in this domain, the basic genetic algoritm processes are defined for STL formulas. The developed synthesis method produces a formula from the data set efficiently in a fully automated way. In particular, the proposed approach does not require an expe...
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Citation Formats
S. K. Aydin and E. Aydın Göl, “Optimizing Parameters of Signal Temporal Logic Formulas with Local Search,” 2019, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/42543.