Haithem Skima

  • Citations Per Year
Learn More
This paper presents a hybrid prognostic approach which is applied on electro-thermally actuated MEMS valve. The method can be applied on different categories of MEMS to assess their health state, calculate the remaining useful life (RUL) and take appropriate decisions to anticipate the failures. In this paper a detailed description of the proposed method is(More)
This paper presents a hybrid prognostics approach for Micro Electro Mechanical Systems (MEMS). This approach relies on two phases: an offline phase for the MEMS and its degradation modeling, and an online phase where the obtained degradation model is used with the available data for prognostics. In the online phase, the particle filter algorithm is used to(More)
We consider a surface designed to convey fragile and tiny micro-objects. It is composed of an array of decentralized blocks that contain MEMS valves. We are interested in the dynamics of the optimal path between two blocks in the surface. The criteria used for optimal paths are related to the degradation of the MEMS, namely its remaining useful life and its(More)
This paper presents accelerated lifetime tests for an electro-thermally actuated MEMS valve in order to identify and analyze its failures. To perform the different tests, two experimental setup are specially designed. Tests consist in cycling several MEMS valves by changing at each test the operating condition: with unfiltered air, without air and with(More)
In this paper, we study the optimal use of a conveying surface, called smart surface, using distributed microrobotic system that is designed to manipulate fragile micro objects. The smart surface is composed of a 2D array of decentralized micro-modules. Each micro-module is composed of a microactuator, a microsensor, computing and communication units. The(More)
This paper presents the data acquisition step of a Prognostics and Health Management (PHM) of Micro-Electro-Mechanical Systems (MEMS) application. The targeted MEMS device is an electro-thermally actuated MEMS valve. The data acquisition is performed during the accelerated lifetime tests. To perform tests, an experimental test bed is designed and built.(More)
Microelectromechanical systems (MEMS) are used in different applications such as automotive, biomedical, aerospace and communication technologies. They create new functionalities and contribute to miniaturize the systems and reduce their costs. However, the reliability of MEMS is one of their major concerns. They suffer from different failure mechanisms(More)
  • 1