This paper focuses on the development of a microsensor system that can simultaneously measure multidirectional forces generated by a tethered fly. The proposed sensor combines the well-understood concepts of piezoresistive force sensing with a very unique design that not only allows the measurement forces with more than one degree of freedom (DOF) but will simultaneously support the fly inside a virtual reality arena. The sensor is fabricated on a wafer-level using standard MicroElectro-Mechanical System or MEMS technology. By a directly measuring the thrust, lift, yaw and side slip generated by the fly, complex aerodynamics mechanisms due to rapidly rotating and flapping wings can be better understood.

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