Test Rigs for Actuators

Actuator Test Rig

Test rigs for performance study and Routine Testing of Industrial Electric Rotary Actuators

The Dynaspede Test Rig for Electric Rotary Actuators is designed to validate the performance of rotary valve actuators in process industry applications. The floor-mounted, self-standing, low vibration test structure is provided with integrated controls. The test sequences are programmed and automated through a PC based control system operating with dedicated engineering software.

Actuator Test Rig

Routine testing involves

  • Simulation of the operating conditions for the purpose of factory setting of various limit switches and torque switches
  • Validating the design limits and performance features when operating under full load and overload conditions

A PC-based control system serves all the control needs of the test bench. It facilitates Automatic sequencing of various tests according to a prescribed program, allows instantaneous display of performance parameters, and stores the results as tables, graphs and trends. The PC console houses all the digital controls and peripherals such as PLC, PC, colour monitor and keyboard.

Test rig for endurance testing of Servo-hydraulic and electro-mechanical actuators for Aviation and Aerospace applications

Actuator Test Rig
Actuator Test Rig

Linear Actuator Test Rigs

Actuator Test Rig
Actuator Test Rig

Dynaspede designs a variety of custom-built automated, computerized test rigs for endurance study on servo-hydraulic and electro-mechanical actuators and actuator motors. These test benches perform various tests in the proper sequence, simulate programmable load profiles, and acquire / and store data on performance parameters of the test actuators / motors.

The test rigs are capable of conducting following routine and endurance tests on actuators:

  • Routine Tests
    • Phase Sequence Test
    • Small Torque Test
    • Torque Switch Test
    • Limit Switch Test
    • Position Feed Test
    • 4-20mA command signal
  • Endurance Tests
    • Cyclic Load:
    • Temperature Rise Test

Routine tests:

1. Phase Sequence Test:

The test is conducted to check and correct the direction of rotation of valve actuator with respect to the incoming supply phase sequence. If the direction of rotation is incorrect, the incoming phase sequence is changed, by clicking t he sequence button on the computer, until the direction of rotation actuator is corrected, when tested for both directions.

2. Stall Torque Test:

In this test, the loading of the test actuator is increased for a selected direction of rotation till stall condition. All the input and output parameters of the actuator such as starting torque/current, stall torque/current, and supply voltage are displayed and recorded at stall. Once the actuator is stalled, loading is decreased till the motor starts running again with the recording of the pull up torque and current values. The test is repeated three times to get the average value.

3. Torque Switch Setting:

This test helps proper setting and calibration of the torque switch provided on the test actuators. To conduct this test, the direction of test rotation and the torque value setting required is defined on the PC. The actuator is automatically started with the load corresponding to set the torque. The torque switch is to be manually adjusted until it trips. PLC stops the actuator once the torque switch trips. The sequence is repeated until the torque switch is properly set for both directions.

4. Limit Switch Setting:

The test allows proper setting of the limit switches provided on the actuators (for setting the maximum rotational limit). To conduct this test, define the value of set turns and the number of open-close operations. The actuator is started automatically with the instructions displayed on the PC for manual setting of the limit switch for the set turns in both the directions.

5. Position Feedback:

This test is useful for calibrating the position feedback signal corresponding to the set turns. On starting the test, the actuator starts automatically with the position feedback signal being displayed on the PC screen. Adjust MAX and MIN setting in sensor for getting required signal (4-20mA) corresponding to the set turns. The PC stops the actuator once the limit switch is tripped.

6. 4-20mA command signal:

In this test, the command signal for the position controller of the actuator is set from the PC in the range of 4-20mA using the slider provided on the PC. After starting the test, actuator is started automatically to verify the position controller functionality. The test ends with the verification of the position feedback signal.

Endurance Tests:

1. Cyclic Load:

This test is performed for endurance study of the test actuator. The test performs Torque Switch trip cycles, Limit switch trip cycles, and Normal Run Cycles for specified cycle durations. The test actuator rotary travel, torque transmission, body temperature, winding resistance (cold / hot), input voltage, current, PF, speed, power and direction are monitored and recorded.

2. Temperature rise test:

The test is performed to monitor and record the motor winding temperature rise when run under predefined cyclic loads.

On starting the test, the cold resistance of the motor is first recorded and the actuator is started. The pre-set loads are applied for the set durations with the monitoring and recording of the hot resistance of the winding at specified durations. The recorded values are used to determine the temperature rise in the motor.