发明名称 |
POSITIONING APPARATUS AND METHOD UTILIZING PWM CONTROL OF A DOUBLE-ACTING HYDRAULIC CYLINDER |
摘要 |
A double-acting hydraulic cylinder is controlled by a pair of three-way solenoid valves respectively fluid connected to the two ends of the cylinder and energized in parallel with a continuous stream of pulse width modulated (PWM) pulses to create a mean effective fluid pressure balance at the cylinder ends that hold a desired position of a connected load and mean effective fluid pressure imbalances in the cylinder ends that produce variable rate load movement in either of two directions to a desired new position, all determined by the pulse duty cycle. |
申请公布号 |
WO9633347(A1) |
申请公布日期 |
1996.10.24 |
申请号 |
WO1996US01750 |
申请日期 |
1996.02.07 |
申请人 |
LOCKHEED MARTIN CORPORATION |
发明人 |
LARKIN, ROBERT, FRANCIS |
分类号 |
F15B9/09;F15B9/03;G05D3/00;G05D3/18 |
主分类号 |
F15B9/09 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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