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Pneumatic Pressure Control Using on-off Valves with Pulse Width Modulation
Chemical Engineering & Technology ( IF 1.8 ) Pub Date : 2022-09-12 , DOI: 10.1002/ceat.202200410 Gabriel De Carvalho 1, 2 , Eric Bideaux 1 , Paolo Massioni 1 , Sylvie Sesmat 1 , Frederic Bristiel 2
Chemical Engineering & Technology ( IF 1.8 ) Pub Date : 2022-09-12 , DOI: 10.1002/ceat.202200410 Gabriel De Carvalho 1, 2 , Eric Bideaux 1 , Paolo Massioni 1 , Sylvie Sesmat 1 , Frederic Bristiel 2
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Servomotor-controlled valves are widely used in industry for pressure control of pneumatic systems. However, as a first stage, they can cause significant hysteresis that can result in loss of pressure or flow control accuracy at the second stage level. To reduce this effect and improve accuracy, a possible solution relies on the use of on-off switching valves controlled by Pulse Width Modulation (PWM). This approach is studied, firstly by analytically determining how the PWM parameters have to be tuned according to the on-off valve characteristics, secondly by ensuring that these characteristics provide the desired behavior of the system, and finally by experimentally verifying whether the PWM control can successfully reduce hysteresis, without decreasing the application range.
中文翻译：
使用脉冲宽度调制开关阀的气动压力控制
伺服电机控制阀在工业中广泛用于气动系统的压力控制。但是，作为第一级，它们可能会导致明显的滞后现象，从而导致第二级级别的压力或流量控制精度损失。为了减少这种影响并提高准确性，一种可能的解决方案是使用由脉冲宽度调制 (PWM) 控制的开关阀。对这种方法进行了研究，首先通过分析确定必须如何根据开关阀特性调整 PWM 参数，其次确保这些特性提供系统所需的行为，最后通过实验验证 PWM 控制是否可以在不降低应用范围的情况下成功地减少了滞后现象。
更新日期：2022-09-12
中文翻译：
使用脉冲宽度调制开关阀的气动压力控制
伺服电机控制阀在工业中广泛用于气动系统的压力控制。但是，作为第一级，它们可能会导致明显的滞后现象，从而导致第二级级别的压力或流量控制精度损失。为了减少这种影响并提高准确性，一种可能的解决方案是使用由脉冲宽度调制 (PWM) 控制的开关阀。对这种方法进行了研究，首先通过分析确定必须如何根据开关阀特性调整 PWM 参数，其次确保这些特性提供系统所需的行为，最后通过实验验证 PWM 控制是否可以在不降低应用范围的情况下成功地减少了滞后现象。
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