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hw4 - The Hong Kong Polytechnic University Department of...

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The Hong Kong Polytechnic University Department of Mechanical Engineering 2008/09 Semester 1 ME4204 Mechatronics Systems Assignment 1 Name: Student ID: 1. Find out the currents through R1 and R3 in the circuit of Fig. 1. Given the voltage sources of V 1 = 10V, V 2 = 9V, V 3 = 1V, R 1 = 5 , R 2 = 10 , R 3 = 5 , R 4 = 5 . (20 marks) Fig. 1 2. Figure 2 shows a schematic strain gauge force transducer, in which force f is applied to the end of a cantilever beam of mild steel (Elastic modulus E = 2 × 10 11 N/m 2 ). Four metallic strain gauges (gauge factor 2) are attached to the upper and lower faces, as shown in Fig. 2, and are connected
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