ZF-S200 Series Hydraulic Servo Drive SystemsHydraulic Servo Drive Systems are control systems that utilize
hydraulic power to achieve high-precision, high-response-speed
servo control. They are widely applied in industrial fields
requiring high power, high load stiffness, and rapid dynamic
response. The core principle involves precise tracking of input
signals (such as position, speed, or force) by hydraulic actuators
(e.g., hydraulic cylinders or motors) under closed-loop control,
enabling efficient and stable motion control.
I. Working PrincipleSignal Input and Comparison The system receives external input signals (e.g., position
commands) and compares them with feedback signals (actual position,
speed, or force) to generate an error signal. Controller Processing A controller (e.g., PID controller) calculates the control quantity
based on the error signal and outputs an electrical signal to the
servo valve. Servo Valve Regulation The servo valve converts the electrical signal into a hydraulic
signal, adjusting the flow rate and pressure of hydraulic oil to
drive the hydraulic actuator. Actuator Movement The hydraulic actuator (e.g., hydraulic cylinder) generates
displacement or force to drive the load. Feedback Detection Sensors (e.g., displacement sensors, pressure sensors) continuously
monitor the actuator’s output and send feedback signals back to the
controller, forming a closed-loop control system.
II. System Composition- Hydraulic Power Source: Hydraulic pump station providing high-pressure hydraulic oil.
- Servo Valve: High-precision electro-hydraulic servo valve for
electrical-to-hydraulic signal conversion.
- Actuator: Hydraulic cylinder or motor driving the load.
- Sensors: Displacement, speed, and force sensors for feedback signals.
- Controller: PLC, DSP, or dedicated motion controller implementing control
algorithms.
- Auxiliary Components: Oil tank, filters, coolers, pipelines, etc.
III. Technical Features- High Power Density
Capable of delivering high power, suitable for heavy-load and
high-inertia applications. - High Response Speed
Servo valve response time can reach milliseconds, ideal for dynamic
control. - High Load Stiffness
Exhibits high stiffness and strong resistance to disturbances. - Precise Control
Closed-loop control achieves micron-level position accuracy and
low-speed stability. - Wide Adjustable Range
Enables speed and force control over a broad range by regulating
hydraulic oil flow and pressure.
IV. Applications- Aerospace: Flight simulators, landing gear retraction, rudder surface
control.
- Industrial Automation: Injection molding machines, die-casting machines, stamping
presses, machine tool feed systems.
- Energy: Wind turbine blade pitch control, hydro turbine governors.
- Marine: Steering gear systems, fin stabilizers.
- Metallurgy: Rolling mill pressure systems, continuous casting mold vibrators.
- Testing Equipment: Material testing machines, vibration tables, fatigue testers.
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