PID Controller
A PID controller is used for control applications to stabilise a system or a response by reducing steady state error in a smooth way. Liquid Instruments’ fully configurable PID Controllers have a high output sampling rate which enables them to be used in applications requiring both low and high feedback bandwidths.
Monitor the Effects of Change in Real-time
The intuitive, graphical user interface allows you to directly adjust the PID parameters on the Bode plot. You are able to monitor the effects of the change in real-time with the built-in oscilloscope saving the tedious trial and error approach required when using other equipment.
Below is the PID Controller’s user interface showcasing the real-time response and some of the key features explained below:
Key Features of the PID Controller:
Versatile Inputs with the Input Control Matrix
Change the values in the input control matrix to combine, rescale and redistribute the input signals to the two independent PID controllers.
Configurable Gain Profiles
There are six gain profiles that are adjustable using the interactive bode plot:
- Proportional (P)
- Integral (I)
- Derivative (D)
- Double-integral (I+)
- Integral saturation (IS)
- Differential saturation (DS)
Multi-section PID builder – This advanced mode features single or double integrators and differentiators with low- and high-frequency gain saturation
Interactive Bode Plot
Design your control system’s frequency response in real-time. The simple user interface allows you to change the gain profiles with the use of a slider. Results can be seen in real time in a very hands-on, user-friendly set-up.
Below is a video on Liquid Instruments’ YouTube channel showcasing the PID Controller instrument. 5:36 – 6:56 shows the interactivity and ease-of-use of the bode plot.
Built in Probe-Points
Easy signal monitoring – The intuitive user interface features a block-diagram view of the signal processing chain. Built-in probe points allow you to see the signal at various points throughout the signal process using the integrated oscilloscope.
Applications:
- Feedback and control systems design
- Laser frequency stabilization
- Temperature regulation
- Scan heads/sample stage positioning
- Pressure, force, flow rate, and other controls