초록 ▼

Modular control patches including assemblies of sensors and actuators are provided to impart or control vibration of foundation members such as struts in aerospace apparatus. Local digital electronic control means is associated with each control patch assembly. Programmable digital compensators in t

Modular control patches including assemblies of sensors and actuators are provided to impart or control vibration of foundation members such as struts in aerospace apparatus. Local digital electronic control means is associated with each control patch assembly. Programmable digital compensators in the control permits operation of the patches to be remotely varied. Patches are attached mechanically or by chemical bonding to the outside of the struts so that the electronics can be selectively removed and replaced. The patch being the sensors and actuators may also be attached or embedded with a composite structure.

대표청구항 ▼

[ What is claimed is:] [1.]1. A control unit for controlling strain in a foundation member, the control unit comprising an assembly being a pre-formed patch containing a base, a piezoelectric sensor and a piezoelectric actuator located in operative relative relationship, means for placing the assemb

[ What is claimed is:] [1.]1. A control unit for controlling strain in a foundation member, the control unit comprising an assembly being a pre-formed patch containing a base, a piezoelectric sensor and a piezoelectric actuator located in operative relative relationship, means for placing the assembly in operative relationship with the foundation member whereby the sensor detects a strain in the foundation member and whereby the actuator imparts a strain-inducing force to the foundation member, means for connecting control electronics in operative relationship with the assembly, and the control electronics including a programmable digital compensator, the compensator having means for periodically storing and updating an input list of most recent input values and an output list of most recent output values, and means for determining a new output value as a weighted algebraic sum of selected ones of the input and output values of the input and output lists.