WIAS Preprint No. 1097, (2006)

Exact controllability on a curve for a semilinear parabolic equation


  • Hömberg, Dietmar
  • Yamamoto, Masahiro

2010 Mathematics Subject Classification

  • 93B05 80A22 35K55


  • Exact controllability, parabolic equation, laser material treatment




Motivated by the growing number of industrially important laser material treatments we investigate the controllability on a curve for a semilinear parabolic equation. We prove the local exact controllability and a global stability result in the twodimensional setting. As an application we consider the control of laser surface hardening. We show that our theory applies to this situation and present numerical simulations for a PID control of laser hardening. Moreover, the result of an industrial case study is presented confirming that the numerically derived temperature in the hot-spot of the laser can indeed be used as set-point for the machine-based process control.

Appeared in

  • Inverse Problems, 22 (2006) pp. 1855--1867.

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