Question

1. A hydraulic cylinder has bore of 50 mm and moves a mass of 10 kg. It is controlled with a valve with a constant kv = 80 Pa/m. The damping coefficient is 2 Ns/m.

Answer 1

Find the area:

$$A=\pi D^2/4=1.96·10^{-3}\text{ m}^2.$$

Find the time constant:

$$T=\sqrt{\frac{M}{Ak_v}}=7.986\text{ s}.$$