Dynamic six-component force measurement is of great significance in the area of aerodynamics. Although a large number of previous experiments had been carried out to study the static characteristics of wind tunnel balance, these test methods are difficult to apply to the dynamic measurement. In this article, a new mechanical device is developed to simulate the hatch open motion with wind loads, and then the dynamic loads is measured by the novel piezoelectric balance. Owing to the dynamic motion characteristics of nonlinearity, nonstationarity, and internal coupling, an effective control system, measuring principle and signal processing method have been proposed. A combined wavelet analysis and EMD adaptive algorithm with multi-sensor data fusion method is studied to process the complicated force signal. In addition, the inertial force of the hatch is eliminated and a force curve changing with angle and time has been obtained. Furthermore, dynamic experimental results demonstrate that the mechanical system and signal processing method can effectively control the hatch open motion and extract the feature of six-component force.