Learn More
The piezo-actuated stages are composed of the piezo-electric actuator and the positioning mechanism. The positioning accuracy of the piezo-actuated stage is limited due to hysteretic nonlinearity of the PEA and friction behaviour of the positioning mechanism. To compensate this nonlinearity of piezoelectric actuator, a PI feedback control associated with(More)
Due to global energy crisis and severe environmental pollution, the photovoltaic (PV) system has become one of the most important renewable energy sources. Many previous studies on solar charger integrated system only focus on load charge control or switching Maximum Power Point Tracking (MPPT) and charge control modes. This study used two-stage system,(More)
Rapid pedestrian detection, distance cruise control, lane departure warning system, and reverse image system are widely used in automobile system, but the real-time detecting driver's drowsiness using the embedded system was not developed in the past. Recently, the biomedical signal processing have been using to solve biomechanical sciences problem, such as(More)
Mask alignment of photolithography technology is used in many applications, such as micro electro mechanical systems' semiconductor process, printed circuits board, and flat panel display. As the dimensions of the product are getting smaller and smaller, the automatic mask alignment of photolithography is becoming more and more important. The traditional(More)
In this study, we use two one-port SAW resonators (SAWR) oriented at 45 degree to the shaft to measure the strain of the shaft. When the shaft is applied by torque, the frequency of SAWRs with maximum received signal strength indication (RSSI) will be influenced by the applied torque. Therefore, we measure the shift of the central frequency for the SAWRs(More)
A motion planning problem for a planar robot on a path with singularity is studied in this paper. The motion planning problem is solved by a proposed hybrid motion planning method to guarantee the robustness of singularity and to reduce the computing load of the optimal-perturbation problem. To verify the proposed method, a tracking path with singularity is(More)
This paper presents the mechanical design, the locomotion and the associated dynamic model of a new robotic wheelchair on climbing winding stairs. The prototype stair-climbing robotic wheelchair is constructed comprising a pair of rotational multi-limbed structures pivotally mounted on opposite sides of a support base so that the robotic wheelchair can(More)