Abstract
In pneumatic circuits, a solenoid valve is a key component for controlling and directing pneumatic energy. The solenoid valve functional performances are defined as response time parameters with respect to its actuations in terms of direction changing time. This paper aims to present response time parameters of solenoid valves under various working pressures. An experimental setup is employed in order to measure response time with reference to the input signals. The response time plays significant role for evaluating the valve performance in sensitive applications. The response time parameters includes the on delay, the off delay, the on time, the off time, the cycle time and the switching frequency. In this experimental investigation the influence of various input pressure conditions is recorded and tabulated. Valves with varying orifice diameter are employed and the investigation reveals the influence of orifice diameter in response time variations. The newly-proposed six response time parameters can be used to rate and select the appropriate valve for various industrial applications.
Highlights
Pneumatic control systems provide low cost automation to the industry with the added benefits of easy maintenance and greener environment
The Modified Pulse Width Modulation (MPWM) techniques are linked with performance deterioration due to the abrupt change in external loads and have been further rectified in [10] with the use of learning vector quantization neural networks (LVQNN)
The response parameters of the solenoid valve of orifice diameter of 1.2 mm are presented in Table I and for the
Summary
Pneumatic control systems provide low cost automation to the industry with the added benefits of easy maintenance and greener environment. This technology aims to great flexibility in the energy used in intricate machine parts and complex manufacturing activities using a cheap power source [1]. A pneumatic servo-system proposed in [9] was realized with digital on-off valves, instead of high cost proportional valves, to obtain a satisfactory dynamic performance by using modulation techniques. The switching type on-off valves (small in size, simple in construction, low cost, high flow rate gain) are preferred to for the control of pneumatic actuators. The development [14] of Al-Fe soft magnetic materials led to the redesign of the structure of magnetic circuits employed to achieve rapid response and strong magnetic force
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