Multi-axis motion controller Lingdong series

hydraulicservomotoranalog

Product overview
The Lingdong series coordinated loading controller provides real-time, high-frequency force/position control for electro-hydraulic and electric servo systems. Implementing a force-position hybrid decoupling algorithm, the platform meets multi-channel coordinated static, dynamic and fatigue loading requirements as well as precise motion control in robotic and electromechanical test benches.

Key capabilities / highlights

• Fully digital closed-loop control with motion disturbance elimination
• Real-time control unit with closed-loop frequency up to 10 kHz
• Distributed architecture for large-scale channel expansion (up to 500 channels)
• Multiple control modes: open-loop, position, static load, dynamic load, speed
• Kinematic and dynamic decoupling to suppress motion-induced disturbance
• Supports electro-hydraulic servo and electric servo actuators
• Interconnect via fiber-optic reflective memory; clock synchronization supported
• BNC analog I/O, general-purpose analog/digital I/O and external calibration interfaces
• Real-time data exchange with external DAQ and host systems

Typical application topology
Refer to system diagram and product manual for typical topologies (illustrative diagrams available on the product page).

Lingdong A-Series
The A-series uses a centralized rack-mounted architecture for compact centralized control and modular expansion up to 32 channels.

• Standard rack chassis with integrated real-time scheduling and servo control
• Multi-channel coordinated control with modular expansion (up to 32 channels)
• Per-channel closed-loop frequency up to 5 kHz
• Supports reflective memory and clock synchronization

Notable A-series variants

• Lingdong A-4: 6U rack, up to 4 loading channels
• Lingdong A-8: 8U rack, up to 8 channels; expandable via bus to 32 channels
• Lingdong A-8E: 8U expansion chassis adding up to 8 channels per chassis

Lingdong B-Series
The B-series features a distributed architecture composed of the B main controller, B-E expansion chassis, SCU (servo control unit) and VCU (hydraulic station controller) for large-scale and flexible deployment.

Lingdong B main controller
The main controller includes a real-time scheduling unit hosting up to four SCUs. The scheduling unit runs on an RTOS to provide deterministic scheduling, channel computation and real-time communication with hosts and external systems.

Lingdong B-E expansion chassis
Expansion chassis connect via an expansion bus and provide slots for I/O and channel expansion modules to scale the system.

Control Unit (SCU)

• Control update rate: up to 10 kHz
• Feedback: two load feedback inputs and one position feedback input; load acquisition accuracy ≤ ±0.05% F.S. with calibration and compensation
• Control outputs: enable and servo outputs; supports voltage/current modes and adjustable valve dither
• BNC analog I/O plus general analog/digital I/O
• Per-channel safety: over-limit, tracking error, sensor open-circuit detection and interlocks

Vehicle Control Unit (VCU)

• Designed for hydraulic station control; each VCU can manage up to two hydraulic stations
• Each station offers two independent solenoid valve outputs for shutdown/low/high pressure control
• Modular expansion by adding VCU modules; supports external E-stop and safety interlocks

Valve Driver Unit (VDU)
VDU provides independent solenoid valve drive per electro-hydraulic channel. Typical mapping: SCU issues enable signals to relays inside VDU; example VDU offers 16 solenoid outputs serving up to eight channels depending on configuration.

Attachments and optional accessories
Power supply

• PSU supports dozens of channels via aviation connectors (example configurations up to 54 channels)
• Multiple rails with monitoring: examples include 24 V / 450 W (main), 24 V / 20 W (sensor excitation), 15 V / 10 W (sensor excitation)

Input/output signal expansion modules

• General multi-function I/O module (GMU)
• General analog I/O module (GAU)
• General digital I/O module (GDU)
• General bridge signal acquisition module (GBU)

Cables and connections

• Primary cable categories: power, control signal and earthing cables
• Power cable example: 3×1.0 mm², 250 V / 10 A, oil-resistant PVC, max recommended length 5 m
• Control cable example: twisted-pair shielded, conductor ≥ 0.2 mm², braid ≥ 85%, max recommended length 50 m
• Earthing cable: recommended cross-sectional area ≥ 2.5 mm²
• Use clear identification marks and quick-plug self-locking connectors matched to equipment interfaces

Cable model selection code (summary)
Format example: QT-X - X.X - X - X - X - X with fields indicating application type, length (m), cable type, connector cores, oil resistance level and other options.

Additional notes
System supports multi-channel coordinated loading, real-time interconnection with external DAQ and host systems. Product page and manual include topology diagrams, wiring recommendations and chassis/module images for system planning.

Technical specifications

• Control architectures: A-series centralized (rack) and B-series distributed
• Maximum closed-loop control frequency: up to 10 kHz
• A-series scalability: modular; single rack supports up to 32 channels (via expansion bus)
• A-4: 6U, up to 4 channels; A-8: 8U, 8 channels; A-8E: expansion chassis +8 channels
• B-series components: real-time scheduling unit, SCU, VCU, VDU
• SCU feedback accuracy: ≤ ±0.05% F.S. for load acquisition (with calibration/compensation)
• SCU I/O: two load + one position feedback; BNC and general analog/digital I/O
• Control outputs: voltage/current modes; adjustable servo valve dither
• Safety: independent per-channel protections and interlocks
• Channel expansion: distributed topologies scale to multi-hundred channels (feature notes up to 500 channels)
• PSU example outputs: 24 V / 450 W, 24 V / 20 W, 15 V / 10 W
• Cable recommendations as described above