An elevator moving at a constant speed of 1.75 m/s is brought to rest by a spring buffer (as shown in Fig 2) consisting of Four helical spring arranged in parallel.

An elevator moving at a constant speed of 1.75 m/s is brought to rest by a spring buffer (as shown in Fig 2) consisting of Four helical spring arranged in parallel. The mass of the elevator is 1020 kg. The springs are compressed by 80 mm in bringing the elevator to rest. The spring index can be taken as 8. The springs are made of steel wire with ultimate tensile strength of 1250 N/mm2 and modulus of rigidity of 81370 N/mm2. The permissible shear stress for the spring wire can be taken as 40% of the ultimate tensile strength. Design the spring and calculate:

Calculate the maximum achievable bridge out-of-balance voltage for an applied torque T of 103 N m given the following

Four strain gauges, with specification given below, are available to measure the torque on a cylindrical shaft 4 cm in diameter connecting a motor and load. (a) Draw clearly labelled….

Find the gain and phase characteristics of the maintaining amplifier.

A solid-state capacitive humidity sensor has a capacitance given by: C = 1.7 RH + 365pF where RH is the percentage relative humidity. The sensor has an associated parallel resistance….

calculate the mean velocity of the gas at maximum flow rate

A pitot tube is used to measure the mean velocity of high pressure gas in a 0.15 m diameter pipe. At maximum flow rate the mean pitot differential pressure is….