The Qtcreate Lingdong Series Coordinated Loading Controllers are designed for high-frequency, high-precision electro-hydraulic and electric servo control applications. Powered by Qtcreate’s proprietary force-position hybrid control algorithm, the controllers achieve decoupled hybrid control of force/torque and position, meeting the demanding requirements for precise force and position control in motion-following loading, high-frequency loading tests, and robot motion control.Featuring hard real-time performance, high dynamic response, broad application versatility, and exceptional reliability, the Lingdong Series provides a unified software configuration environment together with a wide range of I/O interfaces and fieldbus expansion options. The system is widely used in motion-following loading, multi-channel coordinated static and fatigue loading, electromechanical dynamic performance testing, robot motion control, and parallel precision motion control.
- Advanced fully digital closed-loop control algorithm with proprietary motion disturbance elimination technology.
- Real-time operating system with closed-loop control frequencies of up to 10 kHz.
- Distributed architecture for flexible large-scale channel expansion.
- Supports multiple control modes, including open-loop, position, static load, dynamic load, and velocity control.
- Proprietary kinematic and dynamic decoupling algorithms significantly reduce motion disturbance.
- Supports multi-point coordinated loading with up to 500 loading channels.
- Supports electro-hydraulic servo control, electric servo control, pressure control, and temperature control applications.
- Supports high-speed communication with external systems via fiber-optic reflective memory.
- Supports clock synchronization with external systems.
- Supports BNC analog I/O, external command inputs, and integration with external frequency response analyzers.
Lingdong A-Series
Lingdong A-4
6U rack-mounted configuration, supporting up to 4 loading channels.
Lingdong A-8
8U rack-mounted configuration, supporting up to 8 loading channels per unit. Expansion via the expansion bus is supported, allowing scalability up to 32 loading channels.
Lingdong A-8E
Expansion chassis for the Lingdong A-8, featuring an 8U rack-mounted configuration. Each chassis supports expansion of up to 8 loading channels and connects to the Lingdong A-8 through the expansion bus, allowing system expansion up to 32 loading channels.
Lingdong B-Series
Lingdong B Main Controller
The Lingdong B controller main unit includes one real-time scheduling unit with up to four built-in Servo Control Units (SCUs). Each SCU servo control unit corresponds to one servo loading channel.
The real-time scheduling unit operates on a real-time operating system and real-time scheduling software, enabling real-time communication with the host computer, external systems (such as flight simulation systems), and servo control units. It performs real-time scheduling and computation for all connected loading control channels.
Lingdong B-E Expansion Chassis
The Lingdong B-E is the expansion chassis for the Lingdong B system. Through the expansion bus, each Lingdong B-E can expand the system by up to eight Lingdong B loading channels.
Control Unit (SCU)
Main features include:
- Maximum control update rate: 10 kHz;
- Feedback inputs: Two load feedback inputs and one position feedback input. Load signals support bidirectional shunt calibration and bridge excitation compensation, with feedback acquisition accuracy of ≤±0.05% F.S.;
- Control outputs: One enable output and one servo control output. Supports both voltage and current control modes, with adjustable servo valve dither;
- BNC analog input/output, plus general-purpose analog and digital I/O;
- Independent safety protection for each channel, including over-limit protection, tracking error protection, sensor open-circuit detection, and safety interlock.
Vehicle Control Unit (VCU)
The Vehicle Control Unit (VCU) is primarily used for hydraulic station valve group control, enabling scalable multi-station control.Main features include:
- Each VCU controls up to two hydraulic stations;
- Each station provides two independent solenoid valve outputs for shutdown, low-pressure, and high-pressure control of hydraulic substation solenoid valves;
- Additional hydraulic stations can be added by expanding the system with VCU modules;
- Supports external emergency stop (E-stop) inputs and safety interlock protection.
Valve Driver Unit (VDU)
The Valve Driver Unit (VDU) is designed for applications requiring independent solenoid valve drive control for each electro-hydraulic loading channel.
The Servo Control Unit (SCU) provides per-channel enable signals to control the solid-state relays integrated within the VDU, enabling two-channel solenoid valve drive control for each loading channel. Each VDU provides 16 solenoid valve drive outputs and supports up to eight loading channels.