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Optimization as an innovative design approach to improve the performances and the functionalities of mechatronic devices

Author(s): 
Didier Casner, Rémy Houssin, Jean Renaud, Dominique Knittel (INSA Strasbourg)

CHALLENGE - This paper deals with the use of optimization as a method to improve mechatronic designs from the embodiment stage. Requirements expressed by customers imply the design of complex products using less time-consuming approaches. The chosen case study is a laser cutter to investigate the design problem.

SOLUTION - Objectives of the study are the following: maximization of the velocity of the mechatronic device, and minimization of the electrical power and the integrated square error between reference velocity and the real velocity (output of the model). The constraint: torque applied to the pulley of the conveyor belt > 15 NmA. A Matlab script was created to select technical solutions. For each solution, an identifier is provided, which corresponds to its index in the morphological matrix. During the optimization process, performed using modeFRONTIER, the following parameters were optimized: subsystems selectors, parameters of the mechanical structure, actuators, and controllers.

 

 

 

 

 

 

 

 

 

 

BENEFITS - Results show that the best structure consist of a conveyor belt with simple gearbox, ca. 10kW DC motor, and PI velocity controller. NSGA-II algorithm in modeFRONTIER was applied to the optimization process formulating optimal results. This methodology has then been applied to the innovative design of an X-Y table to produce products by laser cutting.

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